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early data from the james webb space telescope (jwst) have revealed a bevy of high-redshift galaxy candidates with unexpectedly high stellar masses. an immediate concern is the consistency of these candidates with galaxy formation in the standard λcdm cosmological model, wherein the stellar mass (m⋆) of a galaxy is lim... | stress testing λcdm with high-redshift galaxy candidates |
the correlation of the tidal polarizabilities λ1-λ2 for gw170817 is predicted by combining dense-matter equations of state (eoss) that satisfy nuclear physics constraints with the chirp mass and mass asymmetry for this event. our models are constrained by calculations of the neutron-matter eos using chiral effective fi... | critical examination of constraints on the equation of state of dense matter obtained from gw170817 |
merging neutron stars offer an excellent laboratory for simultaneously studying strong-field gravity and matter in extreme environments. we establish the physical association of an electromagnetic counterpart (em170817) with gravitational waves (gw170817) detected from merging neutron stars. by synthesizing a panchroma... | illuminating gravitational waves: a concordant picture of photons from a neutron star merger |
the ligo and virgo collaborations have recently announced the detection of gravitational waves from a neutron star-neutron star merger (gw170817) and the simultaneous measurement of an optical counterpart (the γ -ray burst grb 170817a). the close arrival time of the gravitational and electromagnetic waves limits the di... | implications of the neutron star merger gw170817 for cosmological scalar-tensor theories |
using antiferromagnets as active elements in spintronics requires the ability to manipulate and read-out the néel vector orientation. here we demonstrate for mn2au, a good conductor with a high ordering temperature suitable for applications, reproducible switching using current pulse generated bulk spin-orbit torques a... | writing and reading antiferromagnetic mn2au by néel spin-orbit torques and large anisotropic magnetoresistance |
note to the readers: following the publication of the corrigendum, the article was corrected on 15 may 2020. context.aims: the goal of this paper is to demonstrate the outstanding quality of the second data release of the gaia mission and its power for constraining many different aspects of the dynamics of the satellit... | gaia data release 2. kinematics of globular clusters and dwarf galaxies around the milky way |
we explore in a parameterized manner a very large range of physically plausible equations of state (eoss) for compact stars for matter that is either purely hadronic or that exhibits a phase transition. in particular, we produce two classes of eoss with and without phase transitions, each containing one million eoss. w... | new constraints on radii and tidal deformabilities of neutron stars from gw170817 |
the line emission mapper (lem) is an x-ray probe for the 2030s that will answer the outstanding questions of the universe's structure formation. it will also provide transformative new observing capabilities for every area of astrophysics, and to heliophysics and planetary physics as well. lem's main goal is a comprehe... | line emission mapper (lem): probing the physics of cosmic ecosystems |
we use deep nirspec spectroscopic data from the jades survey to derive the star formation histories (sfhs) of a sample of 200 galaxies at 0.6$<$z$<$11 and spanning stellar masses from $\rm 10^6$ to $\rm 10^{9.5}~m_\odot$. we find that galaxies at high-redshift, galaxies above the main sequence (ms) and low-mass g... | jades: differing assembly histories of galaxies -- observational evidence for bursty sfhs and (mini-)quenching in the first billion years of the universe |
we present a sample of 88 candidate z~8.5-14.5 galaxies selected from the completed nircam imaging from the cosmic evolution early release science (ceers) survey. these data cover ~90 arcmin^2 (10 nircam pointings) in six broad-band and one medium-band imaging filter. with this sample we confirm at higher confidence ea... | the complete ceers early universe galaxy sample: a surprisingly slow evolution of the space density of bright galaxies at z ~ 8.5-14.5 |
context. the second gaia data release (dr2) contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million stars from selected variability classes, and orbits for ... | gaia data release 2. catalogue validation |
the star s2 orbiting the compact radio source sgr a* is a precision probe of the gravitational field around the closest massive black hole (candidate). over the last 2.7 decades we have monitored the star's radial velocity and motion on the sky, mainly with the sinfoni and naco adaptive optics (ao) instruments on the e... | detection of the schwarzschild precession in the orbit of the star s2 near the galactic centre massive black hole |
the extension of the cosmic-ray spectrum beyond 1 petaelectronvolt (pev; 1015 electronvolts) indicates the existence of the so-called pevatrons—cosmic-ray factories that accelerate particles to pev energies. we need to locate and identify such objects to find the origin of galactic cosmic rays1. the principal signature... | ultrahigh-energy photons up to 1.4 petaelectronvolts from 12 γ-ray galactic sources |
using backwards ray tracing, we study the shadows of kerr black holes with scalar hair (kbhsh). kbhsh interpolate continuously between kerr bhs and boson stars (bss), so we start by investigating the lensing of light due to bss. moving from the weak to the strong gravity region, bss—which by themselves have no shadows—... | shadows of kerr black holes with scalar hair |
we construct from gaia edr3 an extensive catalogue of spatially resolved binary stars within ≈1 kpc of the sun, with projected separations ranging from a few au to 1 pc. we estimate the probability that each pair is a chance alignment empirically, using the gaia catalogue itself to calculate the rate of chance alignmen... | a million binaries from gaia edr3: sample selection and validation of gaia parallax uncertainties |
we present mass models of the milky way created to fit observational constraints and to be consistent with expectations from theoretical modelling. the method used to create these models is that demonstrated in our previous study, and we improve on those models by adding gas discs to the potential, considering the effe... | the mass distribution and gravitational potential of the milky way |
local galaxies are known to broadly follow a bimodal distribution: actively star forming and quiescent systems (i.e. galaxies with no or negligible star formation activity at the epoch of observation). why, when and how such bimodality was established, and whether it has been associated with different processes at diff... | discovery of a quiescent galaxy at z=7.3 |
the deci-hertz interferometer gravitational wave observatory (decigo) is a future japanese space mission with a frequency band of 0.1 hz to 10 hz. decigo aims at the detection of primordial gravitational waves, which could have been produced during the inflationary period right after the birth of the universe. there ar... | current status of space gravitational wave antenna decigo and b-decigo |
primordial black holes (pbhs) have long been suggested as a viable candidate for the elusive dark matter. the abundance of such pbhs has been constrained using a number of astrophysical observations, except for a hitherto unexplored mass window of mpbh = [10-14, 10-9] solar masses. here we carry out a dense-cadence, 7-... | microlensing constraints on primordial black holes with subaru/hsc andromeda observations |
we use the data from gaia early data release 3 (edr3) to study the kinematic properties of milky way globular clusters. we measure the mean parallaxes and proper motions (pm) for 170 clusters, determine the pm dispersion profiles for more than 100 clusters, uncover rotation signatures in more than 20 objects, and find ... | gaia edr3 view on galactic globular clusters |
fast radio bursts (frbs), millisecond-duration bursts prevailing in the radio sky, are the latest large puzzle in the universe and have been a subject of intense observational and theoretical investigations in recent years. the rapid accumulation of observational data has painted the following sketch about the physical... | the physics of fast radio bursts |
we use gravitational-wave observations of the binary neutron star merger gw170817 to explore the tidal deformabilities and radii of neutron stars. we perform a bayesian parameter estimation with the source location and distance informed by electromagnetic observations. we also assume that the two stars have the same eq... | tidal deformabilities and radii of neutron stars from the observation of gw170817 |
at a distance of 1.295 parsecs, the red dwarf proxima centauri (α centauri c, gl 551, hip 70890 or simply proxima) is the sun’s closest stellar neighbour and one of the best-studied low-mass stars. it has an effective temperature of only around 3,050 kelvin, a luminosity of 0.15 per cent of that of the sun, a measured ... | a terrestrial planet candidate in a temperate orbit around proxima centauri |
the large uv/optical/infrared surveyor (luvoir) mission is one of four decadal survey mission concepts studied by nasa in preparation for the us national academies' astro2020 decadal survey. this observatory has the major goal of characterizing a wide range of exoplanets, including those that might be habitable -- or e... | the luvoir mission concept study final report |
nonspherical mass motions are a generic feature of core-collapse supernovae, and hydrodynamic instabilities play a crucial role in the explosion mechanism. the first successful neutrino-driven explosions could be obtained with self-consistent, first-principles simulations in three spatial dimensions. but three-dimensio... | physics of core-collapse supernovae in three dimensions: a sneak preview |
all ten ligo/virgo binary black hole (bh-bh) coalescences reported following the o1/o2 runs have near-zero effective spins. there are only three potential explanations for this. if the bh spin magnitudes are large, then: (i) either both bh spin vectors must be nearly in the orbital plane or (ii) the spin angular moment... | evolutionary roads leading to low effective spins, high black hole masses, and o1/o2 rates for ligo/virgo binary black holes |
the existence of ∼109m⊙ supermassive black holes (smbhs) within the first billion years of the universe has stimulated numerous ideas for the prompt formation and rapid growth of black holes (bhs) in the early universe. here, we review ways in which the seeds of massive bhs may have first assembled, how they may have s... | the assembly of the first massive black holes |
we compute the radiation reacted momentum impulse δ piμ , spin kick δ siμ, and scattering angle θ between two scattered spinning massive bodies (black holes or neutron stars) using the n =1 supersymmetric worldline quantum field theory formalism up to fourth post-minkowskian (4pm) order. our calculation confirms the st... | dissipative scattering of spinning black holes at fourth post-minkowskian order |
observations of neutron-star mergers with distinct messengers, including gravitational waves and electromagnetic signals, can be used to study the behavior of matter denser than an atomic nucleus and to measure the expansion rate of the universe as quantified by the hubble constant. we performed a joint analysis of the... | multimessenger constraints on the neutron-star equation of state and the hubble constant |
the growing field of large-scale time domain astronomy requires methods for probabilistic data analysis that are computationally tractable, even with large data sets. gaussian processes (gps) are a popular class of models used for this purpose, but since the computational cost scales, in general, as the cube of the num... | fast and scalable gaussian process modeling with applications to astronomical time series |
heavy atomic nuclei have an excess of neutrons over protons, which leads to the formation of a neutron skin whose thickness is sensitive to details of the nuclear force. this links atomic nuclei to properties of neutron stars, thereby relating objects that differ in size by orders of magnitude. the nucleus 208pb is of ... | ab initio predictions link the neutron skin of 208pb to nuclear forces |
the james webb space telescope (jwst) early release observations (eros) is a set of public outreach products created to mark the end of commissioning and the beginning of science operations for jwst. colloquially known as the "webb first images and spectra," these products were intended to demonstrate to the worldwide ... | the jwst early release observations |
the fourth generation of the sloan digital sky survey (sdss-iv) began observations in 2014 july. it pursues three core programs: the apache point observatory galactic evolution experiment 2 (apogee-2), mapping nearby galaxies at apo (manga), and the extended baryon oscillation spectroscopic survey (eboss). as well as i... | the 13th data release of the sloan digital sky survey: first spectroscopic data from the sdss-iv survey mapping nearby galaxies at apache point observatory |
on 17 august 2017, gravitational waves (gws) were detected from a binary neutron star merger, gw170817, along with a coincident short gamma-ray burst, grb 170817a. an optical transient source, swope supernova survey 17a (sss17a), was subsequently identified as the counterpart of this event. we present ultraviolet, opti... | light curves of the neutron star merger gw170817/sss17a: implications for r-process nucleosynthesis |
the probe of inflation and cosmic origins (pico) is an imaging polarimeter that will scan the sky for 5 years in 21 frequency bands spread between 21 and 799 ghz. it will produce full-sky surveys of intensity and polarization with a final combined-map noise level of 0.87 $\mu$k arcmin for the required specifications, e... | pico: probe of inflation and cosmic origins |
we present phangs-alma, the first survey to map co j = 2 → 1 line emission at ~1″ ~100 pc spatial resolution from a representative sample of 90 nearby (d ≲ 20 mpc) galaxies that lie on or near the z = 0 "main sequence" of star-forming galaxies. co line emission traces the bulk distribution of molecular gas, which is th... | phangs-alma: arcsecond co(2-1) imaging of nearby star-forming galaxies |
using the n =1 supersymmetric, spinning worldline quantum field theory formalism, we compute the conservative spin-orbit part of the momentum impulse δ piμ , spin kick δ siμ, and scattering angle θ from the scattering of two spinning massive bodies (black holes or neutron stars) up to fourth post-minkowskian (pm) order... | conservative scattering of spinning black holes at fourth post-minkowskian order |
distant quasars are unique tracers to study the formation of the earliest supermassive black holes (smbhs) and the history of cosmic reionization. despite extensive efforts, only two quasars have been found at z ≥ 7.5, due to a combination of their low spatial density and the high contamination rate in quasar selection... | a luminous quasar at redshift 7.642 |
in recent years our understanding of the dense matter equation of state (eos) of neutron stars has significantly improved by analyzing multimessenger data from radio/x-ray pulsars, gravitational wave events, and from nuclear physics constraints. here we study the additional impact on the eos from the jointly estimated ... | constraints on the dense matter equation of state and neutron star properties from nicer's mass-radius estimate of psr j0740+6620 and multimessenger observations |
in recent years our understanding of neutron stars has advanced remarkably, thanks to research converging from many directions. the importance of understanding neutron star behavior and structure has been underlined by the recent direct detection of gravitational radiation from merging neutron stars. the clean identifi... | from hadrons to quarks in neutron stars: a review |
during the first 500 million years of cosmic history, the first stars and galaxies formed, seeding the universe with heavy elements and eventually reionizing the intergalactic medium1-3. observations with the james webb space telescope (jwst) have uncovered a surprisingly high abundance of candidates for early star-for... | confirmation and refutation of very luminous galaxies in the early universe |
fast radio bursts are astronomical radio flashes of unknown physical nature with durations of milliseconds. their dispersive arrival times suggest an extragalactic origin and imply radio luminosities that are orders of magnitude larger than those of all known short-duration radio transients. so far all fast radio burst... | a direct localization of a fast radio burst and its host |
one of the main goals of the jwst is to study the first galaxies in the universe. we present a systematic photometric analysis of very distant galaxies in the first jwst deep field towards the massive lensing cluster smacs0723. as a result, we report the discovery of two galaxy candidates at z ~ 16, only 250 million ye... | revealing galaxy candidates out to z 16 with jwst observations of the lensing cluster smacs0723 |
the merger of two massive (about 30 solar masses) black holes has been detected in gravitational waves. this discovery validates recent predictions that massive binary black holes would constitute the first detection. previous calculations, however, have not sampled the relevant binary-black-hole progenitors—massive, l... | the first gravitational-wave source from the isolated evolution of two stars in the 40-100 solar mass range |
this overview paper describes the legacy prospect and discovery potential of the dark energy survey (des) beyond cosmological studies, illustrating it with examples from the des early data. des is using a wide-field camera (decam) on the 4 m blanco telescope in chile to image 5000 sq deg of the sky in five filters (gri... | the dark energy survey: more than dark energy - an overview |
fast radio bursts are millisecond-duration astronomical radio pulses of unknown physical origin that appear to come from extragalactic distances. previous follow-up observations have failed to find additional bursts at the same dispersion measure (that is, the integrated column density of free electrons between source ... | a repeating fast radio burst |
the transiting exoplanet survey satellite (tess) will be conducting a nearly all-sky photometric survey over two years, with a core mission goal to discover small transiting exoplanets orbiting nearby bright stars. it will obtain 30 minute cadence observations of all objects in the tess fields of view, along with two-m... | the tess input catalog and candidate target list |
we derive supernova (sn) bounds on muon-philic bosons, taking advantage of the recent emergence of muonic sn models. our main innovations are to consider scalars ϕ in addition to pseudoscalars a and to include systematically the generic two-photon coupling gγ γ implied by a muon triangle loop. this interaction allows f... | muonic boson limits: supernova redux |
we present an improved estimate of the occurrence rate of small planets orbiting small stars by searching the full four-year kepler data set for transiting planets using our own planet detection pipeline and conducting transit injection and recovery simulations to empirically measure the search completeness of our pipe... | the occurrence of potentially habitable planets orbiting m dwarfs estimated from the full kepler dataset and an empirical measurement of the detection sensitivity |
the orbital observatory spectrum-roentgen-gamma (srg), equipped with the grazing-incidence x-ray telescopes mikhail pavlinsky art-xc and erosita, was launched by roscosmos to the lagrange l2 point of the sun-earth system on july 13, 2019. the launch was carried out from the baikonur cosmodrome by a proton-m rocket with... | srg x-ray orbital observatory. its telescopes and first scientific results |
star clusters stand at the intersection of much of modern astrophysics: the ism, gravitational dynamics, stellar evolution, and cosmology. here, we review observations and theoretical models for the formation, evolution, and eventual disruption of star clusters. current literature suggests a picture of this life cycle ... | star clusters across cosmic time |
we update the capabilities of the open-knowledge software instrument modules for experiments in stellar astrophysics (mesa). the new auto_diff module implements automatic differentiation in mesa, an enabling capability that alleviates the need for hard-coded analytic expressions or finite-difference approximations. we ... | modules for experiments in stellar astrophysics (mesa): time-dependent convection, energy conservation, automatic differentiation, and infrastructure |
globular clusters (gcs) exhibit star-to-star variations in specific elements (e.g., he, c, n, o, na, al) that bear the hallmark of high-temperature h-burning. these abundance variations can be observed spectroscopically and also photometrically, with the appropriate choice of filters, due to the changing of spectral fe... | multiple stellar populations in globular clusters |
scalarization is a mechanism that endows strongly self-gravitating bodies, such as neutron stars and black holes, with a scalar field configuration. it resembles a phase transition in that the scalar configuration only appears when a certain quantity that characterizes the compact object, e.g., its compactness or spin,... | scalarization |
fast radio bursts (frbs) are flashes of unknown physical origin1. the majority of frbs have been seen only once, although some are known to generate multiple flashes2,3. many models invoke magnetically powered neutron stars (magnetars) as the source of the emission4,5. recently, the discovery6 of another repeater (frb ... | a repeating fast radio burst source in a globular cluster |
context. gaia data release 1 (dr1) contains astrometric results for more than 1 billion stars brighter than magnitude 20.7 based on observations collected by the gaia satellite during the first 14 months of its operational phase.aims: we give a brief overview of the astrometric content of the data release and of the mo... | gaia data release 1. astrometry: one billion positions, two million proper motions and parallaxes |
this paper provides an update of our previous scaling relations between galaxy-integrated molecular gas masses, stellar masses, and star formation rates (sfrs), in the framework of the star formation main sequence (ms), with the main goal of testing for possible systematic effects. for this purpose our new study combin... | phibss: unified scaling relations of gas depletion time and molecular gas fractions |
context. gaia data release 3 (gaia dr3) contains the second release of the combined radial velocities. it is based on the spectra collected during the first 34 months of the nominal mission. the longer time baseline and the improvements of the pipeline made it possible to push the processing limit from grvs = 12 in gai... | gaia data release 3. properties and validation of the radial velocities |
the onset of galaxy formation is thought to be initiated by the infall of neutral, pristine gas onto the first protogalactic halos. however, direct constraints on the abundance of neutral atomic hydrogen (hi) in galaxies have been difficult to obtain at early cosmic times. here we present spectroscopic observations wit... | extreme damped lyman-$\\alpha$ absorption in young star-forming galaxies at $z=9-11$ |
the discovery of radio pulsars over a half century ago was a seminal moment in astronomy. it demonstrated the existence of neutron stars, gave a powerful observational tool to study them, and has allowed us to probe strong gravity, dense matter, and the interstellar medium. more recently, pulsar surveys have led to the... | fast radio bursts |
we report the discovery and monitoring of the near-infrared counterpart (at2017gfo) of a binary neutron-star merger event detected as a gravitational wave source by advanced laser interferometer gravitational-wave observatory (ligo)/virgo (gw170817) and as a short gamma-ray burst by fermi gamma-ray burst monitor (gbm) ... | the emergence of a lanthanide-rich kilonova following the merger of two neutron stars |
a new piece of evidence supporting the photoevaporation-driven evolution model for low-mass, close-in exoplanets was recently presented by the california-kepler survey. the radius distribution of the kepler planets is shown to be bimodal, with a “valley” separating two peaks at 1.3 and 2.6 r ⊕. such an “evaporation val... | the evaporation valley in the kepler planets |
i introduce batman, a python package for modeling exoplanet transit light curves. the batman package supports calculation of light curves for any radially symmetric stellar limb darkening law, using a new integration algorithm for models that cannot be quickly calculated analytically. the code uses c extension modules ... | batman: basic transit model calculation in python |
the lowest luminosity (l < 105l⊙) milky way satellite galaxies represent the extreme lower limit of the galaxy luminosity function. these ultra-faint dwarfs are the oldest, most dark matter-dominated, most metal-poor, and least chemically evolved stellar systems known. they therefore provide unique windows into the ... | the faintest dwarf galaxies |
context. young circumstellar disks are the birthplaces of planets. their study is of prime interest to understand the physical and chemical conditions under which planet formation takes place. only very few detections of planet candidates within these disks exist, and most of them are currently suspected to be disk fea... | discovery of a planetary-mass companion within the gap of the transition disk around pds 70 |
we consider quarkyonic matter to naturally explain the observed properties of neutron stars. we argue that such matter might exist at densities close to that of nuclear matter, and at the onset, the pressure and the sound velocity in quarkyonic matter increase rapidly. in the limit of large number of quark colors nc, t... | quarkyonic matter and neutron stars |
recent rapid progress in neutron-star (ns) observations offers great potential to constrain the properties of strongly interacting matter under the most extreme conditions. in order to fully exploit the current observational inputs and to study the impact of future observations of ns masses, radii, and tidal deformabil... | multimessenger constraints for ultradense matter |
using a heavy-mass effective field theory (heft), we study gravitational-wave emission in the scattering of two spinless black holes or neutron stars of arbitrary masses at next-to-leading order in the post-minkowskian expansion. we compute the contributions to the one-loop scattering amplitude with four scalars and on... | one-loop gravitational bremsstrahlung and waveforms from a heavy-mass effective field theory |
the james webb space telescope is now detecting early black holes (bhs) as they transition from "seeds" to supermassive bhs. recently, bogdan et al. reported the detection of an x-ray luminous supermassive bh, uhz-1, with a photometric redshift at z > 10. such an extreme source at this very high redshift provides ne... | uncover: the growth of the first massive black holes from jwst/nirspec-spectroscopic redshift confirmation of an x-ray luminous agn at z = 10.1 |
we provide a comprehensive review of major developments in our understanding of gamma-ray bursts, with particular focus on the discoveries made within the last fifteen years when their true nature was uncovered. we describe the observational properties of photons from the radio to 100s gev bands, both in the prompt emi... | the physics of gamma-ray bursts & relativistic jets |
gravitational waves provide a unique tool for observational astronomy. while the first ligo-virgo catalogue of gravitational-wave transients (gwtc-1) contains 11 signals from black hole and neutron star binaries, the number of observations is increasing rapidly as detector sensitivity improves. to extract information f... | bayesian inference for compact binary coalescences with bilby: validation and application to the first ligo-virgo gravitational-wave transient catalogue |
we present the next generation public exoplanet fitting software, exofastv2. it is capable of fitting an arbitrary number of planets, radial velocity data sets, astrometric data sets, and/or transits observed with any combination of wavelengths. we model the star simultaneously in the fit and provide several state-of-t... | exofastv2: a public, generalized, publication-quality exoplanet modeling code |
picture yourself in the wave zone of a gravitational scattering event of two massive, spinning compact bodies (black holes, neutron stars or stars). we show that this system of genuine astrophysical interest enjoys a hidden n = 2 supersymmetry, at least to the order of spin-squared (quadrupole) interactions in arbitrar... | susy in the sky with gravitons |
in the era of precision cosmology, it is essential to determine the hubble constant empirically with an accuracy of one per cent or better1. at present, the uncertainty on this constant is dominated by the uncertainty in the calibration of the cepheid period-luminosity relationship2,3 (also known as the leavitt law). t... | a distance to the large magellanic cloud that is precise to one per cent |
we analyse the chemical properties of three z~ 8 galaxies behind the galaxy cluster smacs j0723.3-7327, observed as part of the early release observations programme of the james webb space telescope. exploiting [o iii]λ4363 auroral line detections in nirspec spectra, we robustly apply the direct te method for the very ... | the chemical enrichment in the early universe as probed by jwst via direct metallicity measurements at z ∼ 8 |
constraints set on key parameters of the nuclear matter equation of state (eos) by the values of the tidal deformability, inferred from gw170817, are examined by using a diverse set of relativistic and nonrelativistic mean-field models. these models are consistent with bulk properties of finite nuclei as well as with t... | gw170817: constraining the nuclear matter equation of state from the neutron star tidal deformability |
the spectral analysis and data products in data release 16 (dr16; 2019 december) from the high-resolution near-infrared apache point observatory galactic evolution experiment (apogee)-2/sloan digital sky survey (sdss)-iv survey are described. compared to the previous apogee data release (dr14; 2017 july), apogee dr16 i... | apogee data and spectral analysis from sdss data release 16: seven years of observations including first results from apogee-south |
we present jwst/nirspec prism spectroscopy of seven galaxies selected from cosmic evolution early release science (ceers) survey nircam imaging with photometric redshifts z phot > 8. we measure emission line redshifts of z = 7.65 and 8.64 for two galaxies. for two other sources without securely detected emission lin... | spectroscopic confirmation of ceers nircam-selected galaxies at z ≃ 8-10 |
context. the gaia dr3 catalogue contains, for the first time, about 800 000 solutions with either orbital elements or trend parameters for astrometric, spectroscopic, and eclipsing binaries, and combinations of these three.aims: with this paper, we aim to illustrate the huge potential of this large non-single-star cata... | gaia data release 3. stellar multiplicity, a teaser for the hidden treasure |
the habitable exoplanet observatory, or habex, has been designed to be the great observatory of the 2030s. for the first time in human history, technologies have matured sufficiently to enable an affordable space-based telescope mission capable of discovering and characterizing earthlike planets orbiting nearby bright ... | the habitable exoplanet observatory (habex) mission concept study final report |
the hyper suprime-cam subaru strategic program (hsc-ssp) is a three-layered imaging survey aimed at addressing some of the most important outstanding questions in astronomy today, including the nature of dark matter and dark energy. the survey has been awarded 300 nights of observing time at the subaru telescope, and i... | first data release of the hyper suprime-cam subaru strategic program |
we present high-precision timing data over time spans of up to 11 years for 45 millisecond pulsars observed as part of the north american nanohertz observatory for gravitational waves (nanograv) project, aimed at detecting and characterizing low-frequency gravitational waves. the pulsars were observed with the arecibo ... | the nanograv 11-year data set: high-precision timing of 45 millisecond pulsars |
the astrophysical rapid neutron capture process or ' r process' of nucleosynthesis is believed to be responsible for the production of approximately half the heavy element abundances found in nature. this multifaceted problem remains one of the greatest open challenges in all of physics. knowledge of nuclear physics pr... | the impact of individual nuclear properties on r-process nucleosynthesis |
we present the details of the photometric and astrometric calibration of the pan-starrs1 3π survey. the photometric goals were to reduce the systematic effects introduced by the camera and detectors, and to place all of the observations onto a photometric system with consistent zero-points over the entire area surveyed... | pan-starrs photometric and astrometric calibration |
we introduce a new, powerful method to constrain properties of neutron stars (nss). we show that the total mass of gw170817 provides a reliable constraint on the stellar radius if the merger did not result in a prompt collapse as suggested by the interpretation of associated electromagnetic emission. the radius {r}1.6 ... | neutron-star radius constraints from gw170817 and future detections |
the advanced ligo and advanced virgo gravitational-wave (gw) detectors will begin operation in the coming years, with compact binary coalescence events a likely source for the first detections. the gravitational waveforms emitted directly encode information about the sources, including the masses and spins of the compa... | parameter estimation for compact binaries with ground-based gravitational-wave observations using the lalinference software library |
context. the large astrometric and photometric survey performed by the gaia mission allows for a panoptic view of the galactic disc and its stellar cluster population. hundreds of stellar clusters were only discovered after the latest gaia data release (dr2) and have yet to be characterised.aims: here we make use of th... | painting a portrait of the galactic disc with its stellar clusters |
the discovery of the gravitational-wave (gw) source gw150914 with the advanced ligo detectors provides the first observational evidence for the existence of binary black hole (bh) systems that inspiral and merge within the age of the universe. such bh mergers have been predicted in two main types of formation models, i... | astrophysical implications of the binary black-hole merger gw150914 |
we explore the orbital implications of the supermassive black hole (smbh) binary in ugc4211, for the frequency spectrum of stochastic gravitational wave background (sgwb) being measured with pulsar timing arrays. the smbh binary in ugc4211 has a projected separation of $\sim 230$ pc and relative velocity of $\sim 150$ ... | binary supermassive black holes orbiting dark matter solitons: from the dual agn in ugc4211 to nanohertz gravitational waves |
the next generation of ground-based gravitational-wave detectors will observe coalescences of black holes and neutron stars throughout the cosmos, thousands of them with exceptional fidelity. the science book is the result of a 3-year effort to study the science capabilities of networks of next generation detectors. su... | the next generation global gravitational wave observatory: the science book |
the dominant decay mode of atomic nuclei is beta decay (β-decay), a process that changes a neutron into a proton (and vice versa). this decay offers a window to physics beyond the standard model, and is at the heart of microphysical processes in stellar explosions and element synthesis in the universe1-3. however, obse... | discrepancy between experimental and theoretical β-decay rates resolved from first principles |
we present both the technical overview and main science drivers of the fourth phase of the optical gravitational lensing experiment (hereafter ogle-iv). ogle-iv is currently one of the largest sky variability surveys worldwide, targeting the densest stellar regions of the sky. the survey covers over 3000 square degrees... | ogle-iv: fourth phase of the optical gravitational lensing experiment |
context. espresso is the new high-resolution spectrograph of eso's very large telescope (vlt). it was designed for ultra-high radial-velocity (rv) precision and extreme spectral fidelity with the aim of performing exoplanet research and fundamental astrophysical experiments with unprecedented precision and accuracy. it... | espresso at vlt. on-sky performance and first results |
this paper presents the gravitational-wave measurement of the hubble constant (h0) using the detections from the first and second observing runs of the advanced ligo and virgo detector network. the presence of the transient electromagnetic counterpart of the binary neutron star gw170817 led to the first standard-siren ... | a gravitational-wave measurement of the hubble constant following the second observing run of advanced ligo and virgo |
low-mass galaxies in the early universe are believed to be the building blocks of present-day galaxies. these fledgling systems likely played a pivotal role in cosmic reionization, a major phase transition from neutral hydrogen to ionized plasma around 600-800 myr after the big bang. however, these galaxies have eluded... | first spectroscopic observations of the galaxies that reionized the universe |
we present the evolution of the mass-metallicity (mz) relation at z = 4-10 derived with 135 galaxies identified in jwst/nirspec data taken from the three major public spectroscopy programs of ero, glass, and ceers. because there are many discrepancies between the flux measurements reported by the early ero studies, we ... | jwst census for the mass-metallicity star formation relations at z = 4-10 with self-consistent flux calibration and proper metallicity calibrators |
we describe new jwst/nirspec observations of galaxies at z ≳ 7 taken from the ceers survey. previous observations of this area have revealed associations of lyα emitters at redshifts (z = 7.5, 7.7, and 8.7) where the intergalactic medium (igm) is thought to be mostly neutral, leading to suggestions that these systems a... | jwst/nirspec spectroscopy of z = 7-9 star-forming galaxies with ceers: new insight into bright lyα emitters in ionized bubbles |
the final evolution of stars in the mass range 70-140 {\text{}}{m}⊙is explored. depending upon their mass loss history and rotation rates, these stars will end their lives as pulsational pair-instability supernovae (ppisn) producing a great variety of observational transients with total durations ranging from weeks to ... | pulsational pair-instability supernovae |
we discuss new constraints on the epoch of cosmic reionization and test the assumption that most of the ionizing photons responsible arose from high-redshift star-forming galaxies. good progress has been made in charting the end of reionization through spectroscopic studies of z ≃ 6-8 qsos, gamma-ray bursts, and galaxi... | cosmic reionization and early star-forming galaxies: a joint analysis of new constraints from planck and the hubble space telescope |
we show a simple, systematic and direct approach to decoupling gravitational sources in general relativity. as a direct application, a robust and simple way to generate anisotropic solutions for self-gravitating systems from perfect fluid solutions is presented. | decoupling gravitational sources in general relativity: from perfect to anisotropic fluids |
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