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most known terrestrial planets orbit small stars with radii less than 60 per cent of that of the sun1,2. theoretical models predict that these planets are more vulnerable to atmospheric loss than their counterparts orbiting sun-like stars3-6. to determine whether a thick atmosphere has survived on a small planet, one a... | absence of a thick atmosphere on the terrestrial exoplanet lhs 3844b |
the first deep-field observations of the jwst have immediately yielded a surprisingly large number of very high redshift candidates, pushing the frontier of observability well beyond z ≳ 10. we here present a detailed sed-fitting analysis of the 10 gravitationally lensed z ~ 9-16 galaxy candidates detected behind the g... | constraining the physical properties of the first lensed z 9 - 16 galaxy candidates with jwst |
cyclotron lines, also called cyclotron resonant scattering features are spectral features, generally appearing in absorption, in the x-ray spectra of objects containing highly magnetized neutron stars, allowing the direct measurement of the magnetic field strength in these objects. cyclotron features are thought to be ... | cyclotron lines in highly magnetized neutron stars |
according to the current understanding of cosmic structure formation, the precursors of the most massive structures in the universe began to form shortly after the big bang, in regions corresponding to the largest fluctuations in the cosmic density field. observing these structures during their period of active growth ... | galaxy growth in a massive halo in the first billion years of cosmic history |
merging binaries consisting of two neutron stars (nss) or an ns and a stellar-mass black hole typically form a massive accretion torus around the remnant black hole or long-lived ns. outflows from these neutrino-cooled accretion disks represent an important site for r-process nucleosynthesis and the generation of kilon... | three-dimensional grmhd simulations of neutrino-cooled accretion disks from neutron star mergers |
in this paper we study a key phase in the formation of massive galaxies: the transition of star-forming galaxies into massive (mstars ∼ 1011m⊙), compact (re ∼ 1 kpc) quiescent galaxies, which takes place from z ∼ 3 to z ∼ 1.5. we use hst grism redshifts and extensive photometry in all five 3d-hst/candels fields, more t... | forming compact massive galaxies |
we introduce a new self-consistent model of galaxy evolution and reionization, astraeus (seminumerical radiative transfer coupling of galaxy formation and reionization in n-body dark matter simulations), which couples a state-of-the-art n-body simulation with the semi-analytical galaxy evolution delphi and the seminume... | astraeus i: the interplay between galaxy formation and reionization |
using observations from the mosfire deep evolution field survey, we investigate the physical conditions of star-forming regions in z ∼ 2.3 galaxies, specifically the electron density and ionization state. from measurements of the [o ii]λλ3726,3729 and [s ii]λλ6716,6731 doublets, we find a median electron density of ∼25... | the mosdef survey: electron density and ionization parameter at z ~ 2.3 |
we reproduce the galaxy clustering catalogue from the sdss-iii baryon oscillation spectroscopic survey final data release (boss dr11&dr12) with high fidelity on all relevant scales in order to allow a robust analysis of baryon acoustic oscillations and redshift space distortions. we have generated (6000) 12 288 mul... | the clustering of galaxies in the sdss-iii baryon oscillation spectroscopic survey: mock galaxy catalogues for the boss final data release |
in the past two decades, high-amplitude electromagnetic outbursts have been detected from dormant galaxies and often attributed to the tidal disruption of a star by the central black hole1,2. x-ray emission from the seyfert 2 galaxy gsn 069 (2masx j01190869-3411305) at a redshift of z = 0.018 was first detected in july... | nine-hour x-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus |
we present results of an all-sky search for continuous gravitational waves which can be produced by spinning neutron stars with an asymmetry around their rotation axis, using data from the third observing run of the advanced ligo and advanced virgo detectors. four different analysis methods are used to search in a grav... | all-sky search for continuous gravitational waves from isolated neutron stars using advanced ligo and advanced virgo o3 data |
it has been a half-decade since the first direct detection of gravitational waves, which signifies the coming of the era of the gravitational-wave astronomy and gravitational-wave cosmology. the increasing number of the detected gravitational-wave events has revealed the promising capability of constraining various asp... | the gravitational-wave physics ii: progress |
recent measurements of rotation periods ( ${p}_{\mathrm{rot}}$ ) in the benchmark open clusters praesepe (670 myr), ngc 6811 (1 gyr), and ngc 752 (1.4 gyr) demonstrate that, after converging onto a tight sequence of slowly rotating stars in mass-period space, stars temporarily stop spinning down. these data also show t... | when do stalled stars resume spinning down? advancing gyrochronology with ruprecht 147 |
turbulence is a crucial factor in many models of planet formation, but it has only been directly constrained among a small number of planet-forming disks. building on the upper limits on turbulence placed in disks around hd 163296 and tw hya, we present alma co j = 2-1 line observations at ∼0"3 (20-50 au) resolution an... | measuring turbulent motion in planet-forming disks with alma: a detection around dm tau and nondetections around mwc 480 and v4046 sgr |
stellar heating causes atmospheres of close-in exoplanets to expand and escape. these extended atmospheres are difficult to observe because their main spectral signature—neutral hydrogen at ultraviolet wavelengths—is strongly absorbed by interstellar medium. we report the detection of the near-infrared triplet of neutr... | spectrally resolved helium absorption from the extended atmosphere of a warm neptune-mass exoplanet |
because of gravitational interactions with their companions, the rotational dynamics of planets and stars involve periodic perturbations of their shape, the direction of their rotational vector, and their rotation rate. these perturbations correspond in planetary terms to tides, precession, and longitudinal libration. ... | flows driven by libration, precession, and tides |
we study the dust content of galaxies from z = 0 to z = 9 in semi-analytic models of galaxy formation that include new recipes to track the production and destruction of dust. we include condensation of dust in stellar ejecta, the growth of dust in the interstellar medium (ism), the destruction of dust by supernovae an... | the dust content of galaxies from z = 0 to z = 9 |
background: the chart of the nuclides is limited by particle drip lines beyond which nuclear stability to proton or neutron emission is lost. predicting the range of particle-bound isotopes poses an appreciable challenge for nuclear theory as it involves extreme extrapolations of nuclear masses well beyond the regions ... | quantified limits of the nuclear landscape |
accurate numerical solutions of the equations of hydrodynamics play an ever more important role in many fields of astrophysics. in this work, we reinvestigate the accuracy of the moving-mesh code arepo and show how its convergence order can be improved for general problems. in particular, we clarify that for certain pr... | improving the convergence properties of the moving-mesh code arepo |
using ultraviolet absorption lines, we analyze the systematic properties of the warm ionized phase of starburst-driven winds in a sample of 39 low-redshift objects that spans broad ranges in starburst and galaxy properties. total column densities for the outflows are ∼1021 cm-2. the outflow velocity (vout) correlates o... | the systematic properties of the warm phase of starburst-driven galactic winds |
satellite galaxies are predicted to generate gravitational density wakes as they orbit within the dark matter (dm) halos of their hosts, causing their orbits to decay over time. the recent infall of the milky way’s (mw) most massive satellite galaxy, the large magellanic cloud (lmc), affords us the unique opportunity t... | hunting for the dark matter wake induced by the large magellanic cloud |
we study the expected spin misalignments of merging binary black holes formed in isolation by combining state-of-the-art population-synthesis models with efficient post-newtonian evolutions, thus tracking sources from stellar formation to gravitational-wave detection. we present extensive predictions of the properties ... | spin orientations of merging black holes formed from the evolution of stellar binaries |
we infer the mass distribution of neutron stars in binary systems using a flexible gaussian mixture model and use bayesian model selection to explore evidence for multimodality and a sharp cut-off in the mass distribution. we find overwhelming evidence for a bimodal distribution, in agreement with previous literature, ... | evidence for a maximum mass cut-off in the neutron star mass distribution and constraints on the equation of state |
the experiment to detect the global epoch of reionization signature (edges) recently reported a strong 21-cm absorption signal relative to the cosmic microwave background at z ∼ 18. while its anomalous amplitude may indicate new physics, in this work we focus on the timing of the signal, as it alone provides an importa... | what does the first highly redshifted 21-cm detection tell us about early galaxies? |
the milky way is a barred spiral galaxy, with physical properties inferred from various tracers informed by the extrapolation of structures seen in other galaxies. however, the distances of these tracers are measured indirectly and are model-dependent. we constructed a map of the milky way in three dimensions, based on... | a three-dimensional map of the milky way using classical cepheid variable stars |
we study the nature of phase transitions between dilute and dense axion stars interpreted as self-gravitating bose-einstein condensates. we develop a newtonian model based on the gross-pitaevskii-poisson equations for a complex scalar field with a self-interaction potential v (|ψ |2) involving an attractive |ψ |4 term ... | phase transitions between dilute and dense axion stars |
in this paper, we investigate anisotropic static spherically symmetric solutions in the framework of f(g) gravity through gravitational decoupling approach. for this purpose, we consider krori and barua (known solution) isotropic interior solution for static spherically symmetric self-gravitating system and extend it t... | gravitational decoupled anisotropic solutions in f(g) gravity |
we report the detection of 5 new candidate binary black hole (bbh) merger signals in the publicly released data from the second half of the third observing run (o3b) of advanced ligo and advanced virgo. the ligo-virgo-kagra (lvk) collaboration reported 35 compact binary coalescences (cbcs) in their analysis of the o3b ... | new binary black hole mergers in the ligo-virgo o3b data |
the recently-discovered stellar system ursa major iii/unions 1 (uma3/u1) is the faintest known milky way satellite to date. with a stellar mass of $16^{+6}_{-5}\,\rm m_\odot$ and a half-light radius of $3\pm1$ pc, it is either the darkest galaxy ever discovered or the faintest self-gravitating star cluster known to orb... | ursa major iii/unions 1: the darkest galaxy ever discovered? |
the gaia mission has provided an invaluable wealth of astrometric data for more than a billion stars in our galaxy. the synergy between gaia astrometry, photometry, and spectroscopic surveys gives us comprehensive information about the milky way. using the bayesian isochrone-fitting code starhorse, we derive distances ... | starhorse results for spectroscopic surveys and gaia dr3: chrono-chemical populations in the solar vicinity, the genuine thick disk, and young alpha-rich stars |
in the most extreme astrophysical environments, such as core-collapse supernovae (ccsne) and neutron star mergers (nsms), neutrinos can undergo fast flavor conversions (ffcs) on exceedingly short scales. intensive simulations have demonstrated that ffcs can attain equilibrium states in certain models. in this study, we... | physics-informed neural networks for predicting the asymptotic outcome of fast neutrino flavor conversions |
providing an accurate modeling of neutrino physics in dense astrophysical environments such as binary neutron star mergers presents a challenge for hydrodynamic simulations. nevertheless, understanding how flavor transformation can occur and affect the dynamics, the mass ejection, and the nucleosynthesis will need to b... | neutrino fast flavor oscillations with moments: linear stability analysis and application to neutron star mergers |
matrix sensing has many real-world applications in science and engineering, such as system control, distance embedding, and computer vision. the goal of matrix sensing is to recover a matrix $a_\star \in \mathbb{r}^{n \times n}$, based on a sequence of measurements $(u_i,b_i) \in \mathbb{r}^{n} \times \mathbb{r}$ such ... | a general algorithm for solving rank-one matrix sensing |
recent observations with the jwst are yielding tantalizing hints of an early population of massive, bright galaxies at z > 10, with atacama large millimeter/submillimeter array (alma) observations indicating significant dust masses as early as z ~ 7. to understand the implications of these observations, we use the d... | the dust enrichment of early galaxies in the jwst and alma era |
the capability of the event horizon telescope (eht) to image the nearest supermassive black hole candidates at horizon-scale resolutions offers a novel means to study gravity in its strongest regimes and to test different models for these objects. here, we study the observational appearance at 230 ghz of a surfaceless ... | how to tell an accreting boson star from a black hole |
we present the spectroscopic time-resolving observatory for broadband energy x-rays (strobe-x), a probe-class mission concept selected for study by nasa. it combines huge collecting area, high throughput, broad energy coverage, and excellent spectral and temporal resolution in a single facility. strobe-x offers an enor... | strobe-x: x-ray timing and spectroscopy on dynamical timescales from microseconds to years |
we present observations with the cosmic origins spectrograph onboard the hubble space telescope of nine low-mass star-forming galaxies at redshifts, z, in the range 0.3179-0.4524, with stellar masses $m_\star \, \lt $ 108 m⊙ and very high specific star-formation rates ssfr ~150-630 gyr-1, aiming to study the dependence... | lyman continuum leakage from low-mass galaxies with m⋆ < 108 m⊙ |
we present the discovery of the type ii supernova sn 2023ixf in m101 and follow-up photometric and spectroscopic observations, respectively, in the first month and week of its evolution. our discovery was made within a day of estimated first light, and the following light curve is characterized by a rapid rise (≈5 days... | from discovery to the first month of the type ii supernova 2023ixf: high and variable mass loss in the final year before explosion |
we present a simple, analytic and straightforward method to elucidate the effects produced by polytropic fluids on any other gravitational source, no matter its nature, for static and spherically symmetric spacetimes. as a direct application, we study the interaction between polytropes and perfect fluids coexisting ins... | energy exchange between relativistic fluids: the polytropic case |
we introduce gwfast, a novel fisher-matrix code for gravitational-wave studies, tuned toward third-generation gravitational-wave detectors such as einstein telescope (et) and cosmic explorer (ce). we use it to perform a comprehensive study of the capabilities of et alone, and of a network made by et and two ce detector... | forecasting the detection capabilities of third-generation gravitational-wave detectors using gwfast |
we present the first james webb space telescope/nircam-led determination of 7 < z < 9 galaxy properties based on broadband imaging from 0.8 to 5 μm as part of the glass-jwst early release science program. this is the deepest data set acquired at these wavelengths to date, with an angular resolution ≲0.″14. we rob... | early results from glass-jwst. x. rest-frame uv-optical properties of galaxies at 7 < z < 9 |
spectroscopic detection of narrow emission lines traces the presence of circumstellar mass distributions around massive stars exploding as core-collapse supernovae. transient emission lines disappearing shortly after the supernova explosion suggest that the material spatial extent is compact and implies an increased ma... | a large fraction of hydrogen-rich supernova progenitors experience elevated mass loss shortly prior to explosion |
finding the emergence of the first generation of metals in the early universe, and identifying their origin, are some of the most important goals of modern astrophysics. we present deep jwst/nirspec spectroscopy of gs-z12, a galaxy at z=12.5, in which we report the detection of c iii]${\lambda}{\lambda}$1907,1909 nebul... | jades: carbon enrichment 350 myr after the big bang in a gas-rich galaxy |
the availability of reliable bolometric corrections and reddening estimates, rather than the quality of parallaxes, will be one of the main limiting factors in determining the luminosities of a large fraction of gaia stars. with this goal in mind, we provide gaiagbp, g, and grp synthetic photometry for the entire marcs... | on the use of gaia magnitudes and new tables of bolometric corrections |
we describe the next generation transit survey (ngts), which is a ground-based project searching for transiting exoplanets orbiting bright stars. ngts builds on the legacy of previous surveys, most notably wasp, and is designed to achieve higher photometric precision and hence find smaller planets than have previously ... | the next generation transit survey (ngts) |
we present euv solar observations showing evidence for omnipresent jetting activity driven by small-scale magnetic reconnection at the base of the solar corona. we argue that the physical mechanism that heats and drives the solar wind at its source is ubiquitous magnetic reconnection in the form of small-scale jetting ... | magnetic reconnection as the driver of the solar wind |
we present a new study of late-type eclipsing binary stars in the small magellanic cloud (smc) undertaken with the aim of improving the distance determination to this important galaxy. a sample of 10 new detached, double-lined eclipsing binaries identified from the ogle variable star catalogs and consisting of f- and g... | a distance determination to the small magellanic cloud with an accuracy of better than two percent based on late-type eclipsing binary stars |
context. the carmenes exoplanet survey of m dwarfs has obtained more than 18 000 spectra of 329 nearby m dwarfs over the past five years as part of its guaranteed time observations (gto) program.aims: we determine planet occurrence rates with the 71 stars from the gto program for which we have more than 50 observations... | the carmenes search for exoplanets around m dwarfs. planet occurrence rates from a subsample of 71 stars |
compose (compstar online supernovae equations of state) is an online repository of equations of state (eos) for use in nuclear physics and astrophysics, e.g., in the description of compact stars or the simulation of core-collapse supernovae and neutron-star mergers, see https://compose.obspm.fr. the main services, offe... | compose reference manual |
photometric stellar surveys now cover a large fraction of the sky, probe to fainter magnitudes than large-scale spectroscopic studies, and are relatively free from the target-selection biases often associated with such studies. photometric-metallicity estimates that include narrow/medium-band filters can achieve compar... | candidate members of the vmp/emp disk system of the galaxy from the skymapper and sages surveys |
we present the second data release of the muse hubble ultra-deep field surveys, which includes the deepest spectroscopic survey ever performed. the muse data, with their 3d content, amazing depth, wide spectral range, and excellent spatial and medium spectral resolution, are rich in information. their location in the h... | the muse hubble ultra deep field surveys: data release ii |
we review the role of stellar flybys and encounters in shaping planet-forming discs around young stars, based on the published literature on this topic in the last 30 years. since most stars ≤2 myr old harbour protoplanetary discs, tidal perturbations affect planet formation. first, we examine the probability of experi... | close encounters: how stellar flybys shape planet-forming discs |
we present timing models for 20 millisecond pulsars in the parkes pulsar timing array. the precision of the parameter measurements in these models has been improved over earlier results by using longer data sets and modelling the non-stationary noise. we describe a new noise modelling procedure and demonstrate its effe... | timing analysis for 20 millisecond pulsars in the parkes pulsar timing array |
gravitational-wave (gw) and electromagnetic (em) signals from the merger of a neutron star (ns) and a black hole (bh) are a highly anticipated discovery. we present a simple formula, validated with 75 simulations, that distinguishes between potential merger outcomes and predicts the baryon mass left outside of the bh a... | remnant baryon mass in neutron star-black hole mergers: predictions for binary neutron star mimickers and rapidly spinning black holes |
the source of the gravitational-wave (gw) signal gw170817, very likely a binary neutron star merger, was also observed electromagnetically, providing the first multi-messenger observations of this type. the two-week-long electromagnetic (em) counterpart had a signature indicative of an r-process-induced optical transie... | estimating the contribution of dynamical ejecta in the kilonova associated with gw170817 |
the observation of binary neutron star merger gw170817, along with its optical counterpart, provided the first constraint on the hubble constant h0 using gravitational wave standard sirens. when no counterpart is identified, a galaxy catalog can be used to provide the necessary redshift information. however, the true h... | cosmological inference using gravitational wave standard sirens: a mock data analysis |
we prove that einstein's equations coupled to equations of the israel-stewart-type, describing the dynamics of a relativistic fluid with bulk viscosity and nonzero baryon charge (without shear viscosity or baryon diffusion) dynamically coupled to gravity, are causal in the full nonlinear regime. we also show that these... | causality of the einstein-israel-stewart theory with bulk viscosity |
the possibility that nucleosynthesis in neutron star mergers may reach fissioning nuclei introduces significant uncertainties in predicting the relative abundances of r-process material from such events. we evaluate the impact of using sets of fission yields given by the 2016 gef code for spontaneous (sf), neutron-indu... | using excitation-energy dependent fission yields to identify key fissioning nuclei in r-process nucleosynthesis |
we present a comparison of parallaxes and radii from asteroseismology and gaia dr1 (tgas) for 2200 kepler stars spanning from the main sequence to the red-giant branch. we show that previously identified offsets between tgas parallaxes and distances derived from asteroseismology and eclipsing binaries have likely been ... | asteroseismology and gaia: testing scaling relations using 2200 keplerstars with tgas parallaxes |
we report the detection of extended lyα haloes around 145 individual star-forming galaxies at redshifts 3 ≤ z ≤ 6 in the hubble ultra deep field observed with the multi-unit spectroscopic explorer (muse) at eso-vlt. our sample consists of continuum-faint (- 15 ≥ muv ≥ -22) lyα emitters (laes). using a 2d, two-component... | the muse hubble ultra deep field survey. viii. extended lyman-α haloes around high-z star-forming galaxies |
the javalambre photometric local universe survey (j-plus ) is an ongoing 12-band photometric optical survey, observing thousands of square degrees of the northern hemisphere from the dedicated jast/t80 telescope at the observatorio astrofísico de javalambre (oaj). the t80cam is a camera with a field of view of 2 deg2 m... | j-plus: the javalambre photometric local universe survey |
einstein's gravity minimally coupled to free, massive, classical fundamental fields admits particle-like solutions. these are asymptotically flat, everywhere non-singular configurations that realise wheeler's concept of a geon: a localised lump of self-gravitating energy whose existence is anchored on the non-lineariti... | asymptotically flat spinning scalar, dirac and proca stars |
we discuss stiffening of matter in quark-hadron continuity. we introduce a model that relates quark wave functions in a baryon and the occupation probability of states for baryons and quarks in dense matter. in a dilute regime, the confined quarks contribute to the energy density through the masses of baryons but do no... | stiffening of matter in quark-hadron continuity |
the fast radio burst frb 121102 has repeated multiple times, enabling the identification of its host galaxy and of a spatially coincident, compact, steady (“persistent”) radio synchrotron source. it was proposed that frb 121102 is powered by a young flaring magnetar, embedded within a decades-old supernova remnant. usi... | a concordance picture of frb 121102 as a flaring magnetar embedded in a magnetized ion-electron wind nebula |
high-resolution doppler-resolved spectroscopy has opened up a new window into the atmospheres of both transiting and non-transiting exoplanets. here, we present vlt/uves observations of a transit of wasp-121b, an `ultra-hot' jupiter previously found to exhibit a temperature inversion and detections of multiple species ... | detection of fe i in the atmosphere of the ultra-hot jupiter wasp-121b, and a new likelihood-based approach for doppler-resolved spectroscopy |
we present cosmos-drift and shift (dash), a hubble space telescope (hst) wide field camera 3 (wfc3) imaging survey of the cosmos field in the h 160 filter. the survey comprises 456 individual wfc3 pointings corresponding to an area of 0.49 deg2 (0.66 deg2 when including archival data) and reaches a 5σ point-source limi... | cosmos-dash: the evolution of the galaxy size-mass relation since z ∼ 3 from new wide-field wfc3 imaging combined with candels/3d-hst |
we report the discovery of a milky way satellite in the constellation of antlia. the antlia 2 dwarf galaxy is located behind the galactic disc at a latitude of b ∼ 11° and spans 1.26°, which corresponds to ∼2.9 kpc at its distance of 130 kpc. while similar in spatial extent to the large magellanic cloud, antlia 2 is or... | the hidden giant: discovery of an enormous galactic dwarf satellite in gaia dr2 |
massive stars have strong stellar winds that direct their evolution through the upper hertzsprung-russell diagram and determine the black hole mass function. furthermore, wind strength dictates the atmospheric structure that sets the ionizing flux. finally, the wind directly intervenes with the stellar envelope structu... | theory and diagnostics of hot star mass loss |
if a phase transition is allowed to take place in the core of a compact star, a new stable branch of equilibrium configurations can appear, providing solutions with the same mass as the purely hadronic branch and hence giving rise to "twin-star" configurations. we perform an extensive analysis of the features of the ph... | constraining twin stars with gw170817 |
a long (110 cmpc h-1) and deep absorption trough in the ly α forest has been observed extending down to redshift 5.5 in the spectrum of ulas j0148+0600. although no ly α transmission is detected, ly β spikes are present which has led to claims that the gas along this trough must be ionized. using high-resolution cosmol... | long troughs in the lyman-α forest below redshift 6 due to islands of neutral hydrogen |
at the end of its life, a very massive star is expected to collapse into a black hole (bh). the recent detection of an 85 m⊙ bh from the gravitational wave event gw 190521 appears to present a fundamental problem as to how such heavy bhs exist above the approximately 50 m⊙ pair-instability (pi) limit where stars are ex... | maximum black hole mass across cosmic time |
the hot and dense core formed in the collapse of a massive star is a powerful source of hypothetical feebly interacting particles such as sterile neutrinos, dark photons, axionlike particles (alps), and others. radiative decays such as a →2 γ deposit this energy in the surrounding material if the mean free path is less... | low-energy supernovae severely constrain radiative particle decays |
kerr black holes (bhs) with scalar hair are solutions of the einstein-klein-gordon field equations describing regular (on and outside an event horizon), asymptotically flat bhs with scalar hair (herdeiro and radu 2014 phys. rev. lett. 112 221101). these bhs interpolate continuously between the kerr solution and rotatin... | construction and physical properties of kerr black holes with scalar hair |
with the advent of new wide-field, high-cadence optical transient surveys, our understanding of the diversity of core-collapse supernovae has grown tremendously in the last decade. however, the pre-supernova evolution of massive stars, which sets the physical backdrop to these violent events, is theoretically not well ... | confined dense circumstellar material surrounding a regular type ii supernova |
we introduce the cluster-eagle (c-eagle) simulation project, a set of cosmological hydrodynamical zoom simulations of the formation of 30 galaxy clusters in the mass range of 1014 < m200/m⊙ < 1015.4 that incorporates the hydrangea sample of bahé et al. (2017). the simulations adopt the state-of-the-art eagle gala... | the cluster-eagle project: global properties of simulated clusters with resolved galaxies |
ultralight bosons and axion-like particles appear naturally in different scenarios and could solve some long-standing puzzles. their detection is challenging, and all direct methods hinge on unknown couplings to the standard model of particle physics. however, the universal coupling to gravity provides model-independen... | constraining the mass of dark photons and axion-like particles through black-hole superradiance |
the kepler survey provides a statistical census of planetary systems out to the habitable zone. because most planets are non-transiting, orbital architectures are best estimated using simulated observations of ensemble populations. here, we introduce epos, the exoplanet population observation simulator, to estimate the... | the exoplanet population observation simulator. i. the inner edges of planetary systems |
we study the rest-frame ultraviolet (uv) continuum slopes (β) of galaxies at redshifts 8 < z < 16 (⟨z⟩ = 10), using a combination of jwst ero and ers nircam imaging and ground-based near-infrared imaging of the cosmos field. the combination of jwst and ground-based imaging provides a wide baseline in both redshif... | the ultraviolet continuum slopes (β) of galaxies at z ≃ 8-16 from jwst and ground-based near-infrared imaging |
there is a long-standing debate regarding the origin of the terrestrial planets' water as well as the hydrated c-type asteroids. here we show that the inner solar system's water is a simple byproduct of the giant planets' formation. giant planet cores accrete gas slowly until the conditions are met for a rapid phase of... | origin of water in the inner solar system: planetesimals scattered inward during jupiter and saturn's rapid gas accretion |
distant star-forming galaxies show a correlation between their star formation rates (sfrs) and stellar masses, and this has deep implications for galaxy formation. here, we present a study on the evolution of the slope and scatter of the sfr-stellar mass relation for galaxies at 3.5 <= z <= 6.5 using multi-wavele... | the relation between star formation rate and stellar mass for galaxies at 3.5 <= z <= 6.5 in candels |
context. the astrometric discovery of sub-stellar mass companions orbiting stars is exceedingly hard due to the required sub-milliarcsecond precision, limiting the application of this technique to only a few instruments on a target-per-target basis and to the global astrometry space missions hipparcos and gaia. the thi... | gaia data release 3. astrometric orbit determination with markov chain monte carlo and genetic algorithms: systems with stellar, sub-stellar, and planetary mass companions |
high dust density in the midplane of protoplanetary disks is favorable for efficient grain growth and can allow fast formation of planetesimals and planets, before disks dissipate. vertical settling and dust trapping in pressure maxima are two mechanisms allowing dust to concentrate in geometrically thin and high-densi... | a highly settled disk around oph163131 |
we constrain the intrinsic architecture of kepler planetary systems by modeling the observed multiplicities of the transiting planets (tranets) and their transit timing variations (ttvs). we robustly determine that the fraction of sun-like stars with kepler-like planets, η kepler, is 30 ± 3%. here, kepler-like planets ... | about 30% of sun-like stars have kepler-like planetary systems: a study of their intrinsic architecture |
context. gaia data and stellar surveys open the way to the construction of detailed 3d maps of the galactic interstellar (is) dust based on the synthesis of star distances and extinctions. dust maps are tools of broad use, also for gaia-related milky way studies.aims: reliable extinction measurements require very accur... | three-dimensional maps of interstellar dust in the local arm: using gaia, 2mass, and apogee-dr14 |
nuclear matter and finite nuclei exhibit the property of superfluidity by forming cooper pairs. we review the microscopic theories and methods that are being employed to understand the basic properties of superfluid nuclear systems, with emphasis on the spatially extended matter encountered in neutron stars, supernova ... | superfluidity in nuclear systems and neutron stars |
the density structure surrounding the iron core of a massive star when it dies is known to have a major effect on whether or not the star explodes. here we repeat previous surveys of presupernova evolution with some important corrections to code physics and four to 10 times better mass resolution in each star. the numb... | a high-resolution study of presupernova core structure |
radio observations of tidal disruption events (tdes) probe material ejected by the disruption of stars by supermassive black holes (smbhs), uniquely tracing the formation and evolution of jets and outflows, revealing details of the disruption hydrodynamics, and illuminating the environments around previously-dormant sm... | radio properties of tidal disruption events |
mapping nearby galaxies at apache point observatory (manga), one of three core programs in the sloan digital sky survey-iv, is an integral-field spectroscopic survey of roughly 10,000 nearby galaxies. it employs dithered observations using 17 hexagonal bundles of 2″ fibers to obtain resolved spectroscopy over a wide wa... | sdss-iv/manga: spectrophotometric calibration technique |
we have entered a new era where integral-field spectroscopic surveys of galaxies are sufficiently large to adequately sample large-scale structure over a cosmologically significant volume. this was the primary design goal of the sami galaxy survey. here, in data release 3, we release data for the full sample of 3068 un... | the sami galaxy survey: the third and final data release |
outflows from accreting, rotating, and magnetized systems are ubiquitous. protostellar outflows can be observed from radio to x-ray wavelengths in the continuum and a multitude of spectral lines that probe a wide range of physical conditions, chemical phases, radial velocities, and proper motions. wide-field visual and... | protostellar outflows |
some of the heavy elements, such as gold and europium (eu), are almost exclusively formed by the rapid neutron capture process (r-process). however, it is still unclear which astrophysical site between core-collapse supernovae and neutron star-neutron star (ns-ns) mergers produced most of the r-process elements in the ... | the origin of r-process elements in the milky way |
since more than 70 years ago, the colours of galaxies derived from flux measurements at different wavelengths have been used to estimate their cosmological distances. such distance measurements, called photometric redshifts, are necessary for many scientific projects, ranging from investigations of the formation and ev... | the many flavours of photometric redshifts |
the detailed observations of gw170817 proved for the first time directly that neutron star mergers are a major production site of heavy elements. the observations could be fit by a number of simulations that qualitatively agree, but can quantitatively differ (e.g., in total r-process mass) by an order of magnitude. we ... | axisymmetric radiative transfer models of kilonovae |
six gravitational wave detections have been reported so far, providing crucial insights on the merger rate of double compact objects. we investigate the cosmic merger rate of double neutron stars (dnss), neutron star black hole binaries (nsbhs), and black hole binaries (bhbs) by means of population-synthesis simulation... | the cosmic merger rate of neutron stars and black holes |
motivated by the recent discovery of a compact object with mass in the range 2.5-2.67 m⊙ in the binary merger gw190814, we revisit the question of the maximum mass of neutron stars (nss). we use a markov chain monte carlo approach to generate about two million phenomenological equations of state with and without first-... | on the maximum mass of neutron stars and gw190814 |
context. reliable predictions of mass-loss rates are important for massive-star evolution computations.aims: we aim to provide predictions for mass-loss rates and wind-momentum rates of o-type stars, while carefully studying the behaviour of these winds as functions of stellar parameters, such as luminosity and metalli... | new predictions for radiation-driven, steady-state mass-loss and wind-momentum from hot, massive stars. ii. a grid of o-type stars in the galaxy and the magellanic clouds |
kilonova spectra imprint valuable information about the elements synthesized in neutron star mergers. in at2017gfo, the kilonova associated with gw170817, the spectroscopic feature centered around 8000 angstroms has been interpreted as the p-cygni profile arising from singly ionized strontium. recently, perego et al. (... | non-lte analysis for helium and strontium lines in the kilonova at2017gfo |
clear windows onto emergent hadron mass (ehm) and modulations thereof by higgs boson interactions are provided by observable measures of pion and kaon structure, many of which are accessible via generalised parton distributions (gpds). beginning with algebraic gpd ansätze, constrained entirely by hadron-scale $\pi$ and... | revealing pion and kaon structure via generalised parton distributions |
we apply novel, recently developed plasma ray-tracing techniques to model the propagation of radio photons produced by axion dark matter in neutron star magnetospheres and combine this with both archival and new data for the galactic center magnetar psr j1745-2900. the emission direction to the observer and the magneti... | towards robust constraints on axion dark matter using psr j1745-2900 |
we present a much improved equation of state for neutron star matter, qhc19, with a smooth crossover from the hadronic regime at lower densities to the quark regime at higher densities. we now use the togashi et al. equation of state, a generalization of the akmal-pandharipande-ravenhall equation of state of uniform nu... | new neutron star equation of state with quark-hadron crossover |
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