abstract stringlengths 3 192k | title stringlengths 4 857 |
|---|---|
gas blown away from galactic disks by supernova (sn) feedback plays a key role in galaxy evolution. we investigate outflows utilizing the solar neighborhood model of our high-resolution, local galactic disk simulation suite, tigress. in our numerical implementation, star formation and sn feedback are self-consistently ... | numerical simulations of multiphase winds and fountains from star-forming galactic disks. i. solar neighborhood tigress model |
we show that the h0 tension can be resolved by making recombination occur earlier, keeping the fit to cosmic microwave background (cmb) data almost intact. we provide a suite of general necessary conditions to give a good fit to cmb data while realizing a high value of h0 suggested by local measurements. as a concrete ... | early recombination as a solution to the h0 tension |
we present a novel framework for the equation of state of dense and hot quantum chromodynamics (qcd), which focuses on the region of the phase diagram relevant for neutron star mergers and core-collapse supernovae. the model combines predictions from the gauge/gravity duality with input from lattice field theory, qcd p... | dense and hot qcd at strong coupling |
we present ultraviolet through near-infrared photometry and spectroscopy of the host galaxies of all superluminous supernovae (slsne) discovered by the palomar transient factory prior to 2013 and derive measurements of their luminosities, star formation rates, stellar masses, and gas-phase metallicities. we find that t... | host-galaxy properties of 32 low-redshift superluminous supernovae from the palomar transient factory |
we present a new determination of the concentration-mass (c-m) relation for galaxy clusters based on our comprehensive lensing analysis of 19 x-ray selected galaxy clusters from the cluster lensing and supernova survey with hubble (clash). our sample spans a redshift range between 0.19 and 0.89. we combine weak-lensing... | clash: the concentration-mass relation of galaxy clusters |
we explore the impact of small-scale flavor conversions of neutrinos, the so-called fast flavor conversions (ffcs), on the dynamical evolution and neutrino emission of core-collapse supernovae (ccsne). in order to do that, we implement ffcs in the spherically symmetric (1d) ccsn simulations of a 20 m⊙ progenitor model ... | fast neutrino flavor conversion in core-collapse supernovae: a parametric study in 1d models |
fast-pairwise collective neutrino oscillation represents a key uncertainty in the theory of core-collapse supernova (ccsn). despite the potentially significant impact on ccsn dynamics, it is usually neglected in numerical models of ccsn because of the formidable technical difficulties of self-consistently incorporating... | where, when, and why: occurrence of fast-pairwise collective neutrino oscillation in three-dimensional core-collapse supernova models |
the all-sky automated survey for supernovae (asas-sn) provides long-baseline (∼4 yr) light curves for sources brighter than v ≲ 17 mag across the whole sky. the transiting exoplanet survey satellite (tess) has started to produce high-quality light curves with a baseline of at least 27 d, eventually for most of the sky.... | the asas-sn catalogue of variable stars iii: variables in the southern tess continuous viewing zone |
our current understanding of the stellar initial mass function and massive star evolution suggests that young globular clusters (gcs) may have formed hundreds to thousands of stellar-mass black holes (bhs), the remnants of stars with initial masses from ~20-100 m ⊙. birth kicks from supernova explosions may eject some ... | the dynamical evolution of stellar black holes in globular clusters |
context. as a result of their formation via massive single and binary stellar evolution, the masses of stellar-remnant black holes (bh) are subjects of great interest in this era of gravitational-wave detection from binary black hole (bbh) and binary neutron star merger events.aims: in this work, we present new develop... | bse versus startrack: implementations of new wind, remnant-formation, and natal-kick schemes in nbody7 and their astrophysical consequences |
we construct modified cosmological scenarios through the application of the first law of thermodynamics on the universe horizon, but using the generalized, nonextensive tsallis entropy instead of the usual bekenstein-hawking one. we result to modified cosmological equations that possess the usual ones as a particular l... | modified cosmology through nonextensive horizon thermodynamics |
in this paper, we present the results of our three-dimensional, multigroup, multineutrino-species radiation/hydrodynamic simulation using the state-of-the-art code fornax of the terminal dynamics of the core of a non-rotating 16 m⊙ stellar progenitor. the calculation incorporates redistribution by inelastic scattering,... | a successful 3d core-collapse supernova explosion model |
the post-helium-burning evolution of stars from 7 {m}⊙to 11 {m}⊙is complicated by the lingering effects of degeneracy and off-center ignition. here, stars in this mass range are studied using a standard set of stellar physics. two important aspects of the study are the direct coupling of a reaction network of roughly 2... | the remarkable deaths of 9-11 solar mass stars |
the preponderance of matter over antimatter in the early universe, the dynamics of the supernovae that produced the heavy elements necessary for life, and whether protons eventually decay—these mysteries at the forefront of particle physics and astrophysics are key to understanding the early evolution of our universe, ... | volume iii. dune far detector technical coordination |
we introduce tigress, a novel framework for multi-physics numerical simulations of the star-forming interstellar medium (ism) implemented in the athena mhd code. the algorithms of tigress are designed to spatially and temporally resolve key physical features, including: (1) the gravitational collapse and ongoing accret... | three-phase interstellar medium in galaxies resolving evolution with star formation and supernova feedback (tigress): algorithms, fiducial model, and convergence |
interaction-powered supernovae (sne) explode within an optically thick circumstellar medium (csm) that could be ejected during eruptive events. to identify and characterize such pre-explosion outbursts, we produce forced-photometry light curves for 196 interacting sne, mostly of type iin, detected by the zwicky transie... | bright, months-long stellar outbursts announce the explosion of interaction-powered supernovae |
we present a set of multiwavelength mosaics and photometric catalogs in the atacama large millimeter/submillimeter array (alma) lensing cluster survey fields. the catalogs were built by the reprocessing of archival data from the complete hubble archive for galaxy evolution compilation, taken by the hubble space telesco... | alma lensing cluster survey: hubble space telescope and spitzer photometry of 33 lensed fields built with charge |
we wish to investigate whether there is an extension to the base λcdm cosmology that can resolve the tension between the planck observation of the cosmic microwave background anisotropies and the local measurement of the hubble constant. we consider various plausible extended models in this work, and we use the planck ... | can the h0 tension be resolved in extensions to λcdm cosmology? |
new developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic photon sorting have opened up the possibility for building a large-scale detector that can discriminate between cherenkov and scintillation signals. such a detector could reconstruct particle direction and species using cher... | uc(theia): an advanced optical neutrino detector |
we investigate the impact of stellar rotation on the formation of black holes (bhs) by means of our population synthesis code sevn. rotation affects the mass function of bhs in several ways. in massive metal-poor stars, fast rotation reduces the minimum zero-age main sequence (zams) mass for a star to undergo pair inst... | impact of the rotation and compactness of progenitors on the mass of black holes |
studies of dark energy at advanced gravitational-wave (gw) interferometers normally focus on the dark energy equation of state wde(z ). however, modified gravity theories that predict a nontrivial dark energy equation of state generically also predict deviations from general relativity in the propagation of gws across ... | modified gravitational-wave propagation and standard sirens |
we present final natural-system optical (ugribv) and near-infrared (yjh) photometry of 134 supernovae (sne) with probable white dwarf progenitors that were observed in 2004-2009 as part of the first stage of the carnegie supernova project (csp-i). the sample consists of 123 type ia sne, 5 type iax sne, 2 super-chandras... | the carnegie supernova project. i. third photometry data release of low-redshift type ia supernovae and other white dwarf explosions |
progenitor models for the "luminous" subclass of fast blue optical transients (lfbots; prototype: at2018cow) are challenged to simultaneously explain all of their observed properties: fast optical rise times of days or less; peak luminosities ≳1044 erg s-1; low yields ≲0.1m ⊙ of 56ni; aspherical ejecta with a wide velo... | luminous fast blue optical transients and type ibn/icn sne from wolf-rayet/black hole mergers |
in the present work, the optical properties of polyvinyl alcohol (pva)/polyvinyl pyrrolidone (pvp) (1:1) polymeric blend have been tuned in situ using tin sulfide (sns) semiconductor for optoelectronics. the solution casting technique was used to prepare plain pva/pvp polymeric blend and different weight ratios percent... | engineering the optical properties of pva/pvp polymeric blend in situ using tin sulfide for optoelectronics |
in 1964, refsdal hypothesized that a supernova whose light traversed multiple paths around a strong gravitational lens could be used to measure the rate of cosmic expansion. we report the discovery of such a system. in hubble space telescope imaging, we have found four images of a single supernova forming an einstein c... | multiple images of a highly magnified supernova formed by an early-type cluster galaxy lens |
in this paper, we investigate a recent proposed model - so called the tsallis holographic dark energy (thde) model with consideration of the hubble and the event future horizon as ir cutoffs. in this case, we consider the non-gravitational and phenomenological interaction between dark sectors. we fit the free parameter... | observational constraints on interacting tsallis holographic dark energy model |
feedback from massive stars plays a key role in molecular cloud evolution. after the onset of star formation, the young stellar population is exposed by photoionization, winds, supernovae, and radiation pressure from massive stars. recent observations of nearby galaxies have provided the evolutionary timeline between m... | on the duration of the embedded phase of star formation |
during the first three observing runs of the advanced gravitational-wave detector network, the ligo/virgo collaboration detected several black hole binary (bhbh) mergers. as the population of detected bhbh mergers grows, it will become possible to constrain different channels for their formation. here we consider the c... | cosmic rates of black hole mergers and pair-instability supernovae from chemically homogeneous binary evolution |
we present the fourth simulation of the cholla galactic outflow simulations suite. using a physically motivated prescription for clustered supernova feedback, we successfully drive a multiphase outflow from a disk galaxy. the high resolution (<5 pc) across a relatively large domain (20 kpc) allows us to capture the ... | the physical nature of starburst-driven galactic outflows |
over the last years some interest has been gathered by f (q ) theories, which are new candidates to replace einstein's prescription for gravity. the nonmetricity tensor q allows to put forward the assumption of a free torsionless connection and, consequently, new degrees of freedom in the action are taken into account.... | observational constraints on cosmological solutions of f (q ) theories |
i present a set of long-term, direct, relativistic many-body computations of model dense stellar clusters with up-to-date stellar-evolutionary, supernova (sn), and remnant natal-kick models, including pair instability and pulsation pair instability supernova (psn and ppsn), using an updated version of ${\rm{\small nbod... | stellar-mass black holes in young massive and open stellar clusters - iv. updated stellar-evolutionary and black hole spin models and comparisons with the ligo-virgo o1/o2 merger-event data |
the era of large transient surveys, gravitational-wave observatories, and multi-messenger astronomy has opened up new possibilities for our understanding of the evolution and final fate of massive stars. most massive stars are born in binary or higher-order multiple systems and exchange mass with a companion star durin... | pre-supernova evolution, compact-object masses, and explosion properties of stripped binary stars |
the most precise local measurements of h0 rely on observations of type ia supernovae (sne ia) coupled with cepheid distances to sn ia host galaxies. recent results have shown tension comparing h0 to the value inferred from cmb observations assuming λcdm, making it important to check for potential systematic uncertainti... | measuring the hubble constant with type ia supernovae as near-infrared standard candles |
low-mass galaxies are thought to provide the bulk of the ionizing radiation necessary to reionize the universe. the amount of photons escaping the galaxies is poorly constrained theoretically, and difficult to measure observationally. yet it is an essential parameter of reionization models. we study in detail how ioniz... | fluctuating feedback-regulated escape fraction of ionizing radiation in low-mass, high-redshift galaxies |
we introduce the 'engineering dwarfs at galaxy formation's edge' (edge) project to study the cosmological formation and evolution of the smallest galaxies in the universe. in this first paper, we explore the effects of resolution and sub-grid physics on a single low-mass halo (m_halo=109{ m}_⊙), simulated to redshift z... | edge: the mass-metallicity relation as a critical test of galaxy formation physics |
existing models for the dependence of the halo mass function on cosmological parameters will become a limiting source of systematic uncertainty for cluster cosmology in the near future. we present a halo mass function emulator and demonstrate improved accuracy relative to state-of-the-art analytic models. in this work,... | the aemulus project. ii. emulating the halo mass function |
we present the analysis underpinning the measurement of cosmological parameters from 207 spectroscopically classified sne ia from the first 3 years of the dark energy survey supernova program (des-sn), spanning a redshift range of 0.017 < z < 0.849. we combine the des-sn sample with an external sample of 122 low-... | first cosmology results using sne ia from the dark energy survey: analysis, systematic uncertainties, and validation |
short gamma-ray bursts (grbs) are explosions of cosmic origins believed to be associated with the merger of two compact objects, either two neutron stars or a neutron star and a black hole (bh). the presence of at least one neutron star has long been thought to be an essential element of the model: its tidal disruption... | short gamma-ray bursts from the merger of two black holes |
we investigate r-process nucleosynthesis in 3d general-relativistic magnetohydrodynamic simulations of rapidly rotating strongly magnetized core collapse. the simulations include a microphysical finite-temperature equation of state and a leakage scheme that captures the overall energetics and lepton number exchange due... | r-process nucleosynthesis from three-dimensional magnetorotational core-collapse supernovae |
we extend the analysis of a physical model within the standard cosmology that robustly predicts a high star-formation efficiency (sfe) in massive galaxies at cosmic dawn due to feedback-free starbursts (ffb). it implies an excess of bright galaxies at z>~10 compared to the standard models based on the low sfe at lat... | feedback-free starbursts at cosmic dawn: observable predictions for jwst |
shock breakout emission is light that arises when a shockwave, generated by core-collapse explosion of a massive star, passes through its outer envelope. hitherto, the earliest detection of such a signal was at several hours after the explosion, though a few others had been reported. the temporal evolution of early lig... | a shock flash breaking out of a dusty red supergiant |
we consider a low redshift (z <0.7 ) cosmological data set comprising megamasers, cosmic chronometers, type ia supernovae and baryon acoustic oscillations, which we bin according to their redshift. for each bin, we read the value of h0 by fitting directly to the flat λ cdm model. doing so, we find that h0 descends w... | is there an early universe solution to hubble tension? |
the rapidly growing statistical precision of galaxy surveys has led to a need for ever more precise predictions of the observables used to constrain cosmological and galaxy formation models. the primary avenue through which such predictions will be obtained is suites of numerical simulations. these simulations must spa... | the aemulus project. i. numerical simulations for precision cosmology |
reliable indirect diagnostics of lyc photon escape from galaxies are required to understand which sources were the dominant contributors to reionization. while multiple escape fraction ($f_{\rm esc}$) indicators have been proposed to trace favourable conditions for lyc leakage from the interstellar medium of low-redshi... | the physics of indirect estimators of lyman continuum escape and their application to high-redshift jwst galaxies |
we present a new subgrid model for neutrino quantum kinetics, which is primarily designed to incorporate effects of collective neutrino oscillations into neutrino-radiation-hydrodynamic simulations for core-collapse supernovae and mergers of compact objects. we approximate the neutrino oscillation term in quantum kinet... | bgk subgrid model for neutrino quantum kinetics |
synthesized in the cores of stars and supernovae, most metals disperse over cosmic scales and are ultimately deposited well outside the gravitational potential of their host galaxies. since their presence is well visible through their x-ray emission lines in the hot gas pervading galaxy clusters, measuring metal abunda... | exploring chemical enrichment of the intracluster medium with the line emission mapper |
we present simulations of the multiphase interstellar medium (ism) at solar neighbourhood conditions including thermal and non-thermal ism processes, star cluster formation, and feedback from massive stars: stellar winds, hydrogen ionizing radiation computed with the novel treeray radiative transfer method, supernovae ... | silcc vi - multiphase ism structure, stellar clustering, and outflows with supernovae, stellar winds, ionizing radiation, and cosmic rays |
we further investigate the dark energy model based on the finsler geometry inspired osculating barthel-kropina cosmology. the barthel-kropina cosmological approach is based on the introduction of a barthel connection in an osculating finsler geometry, with the connection having the property that it is the levi-civita c... | cosmological tests of the osculating barthel-kropina dark energy model |
we describe the dark energy survey (des) deep fields, a set of images and associated multiwavelength catalogue (ugrizjhks) built from dark energy camera (decam) and visible and infrared survey telescope for astronomy (vista) data. the des deep fields comprise 11 fields (10 des supernova fields plus cosmos), with a tota... | dark energy survey year 3 results: deep field optical + near-infrared images and catalogue |
the tip of the red giant branch (trgb) provides a luminous standard candle for constructing distance ladders to measure the hubble constant. in practice, its measurements via edge-detection response (edr) are complicated by the apparent fuzziness of the tip and the multipeak landscape of the edr. previously, we optimiz... | cats: the hubble constant from standardized trgb and type ia supernova measurements |
we present detailed optical photometry and spectroscopy of the type iin supernova (sn) 2021qqp. its unusual light curve is marked by a long gradual brightening (i.e., precursor) for about 300 days, a rapid increase in brightness for about 60 days, and then a sharp increase of about 1.6 mag in only a few days to a first... | multiple peaks and a long precursor in the type iin supernova 2021qqp: an energetic explosion in a complex circumsteller environment |
we identify the progenitor star of sn 2023ixf in the nearby galaxy messier 101 using keck/nirc2 adaptive optics imaging and pre-explosion hst/acs images. the supernova position, localized with diffraction-spike pattern and high precision relative astrometry, unambiguously coincides with a single progenitor candidate of... | the progenitor star of sn 2023ixf: a massive red supergiant with enhanced, episodic pre-supernova mass loss |
neutrinos play pivotal roles in determining fluid dynamics, nucleosynthesis, and their observables in core-collapse supernova (ccsn) and binary neutron star merger (bnsm). in this letter, we present a novel phenomenon, collisional flavor swap, in which neutrino-matter interactions trigger the complete interchange of ne... | collisional flavor swap with neutrino self-interactions |
we present 1.3 mm (230 ghz) observations of the recent and nearby type ii supernova, sn 2023ixf, obtained with the submillimeter array (sma) at 2.6-18.6 days after explosion. the observations were obtained as part the sma large program, poets (pursuit of extragalactic transients with the sma). we do not detect any emis... | millimeter observations of the type ii sn 2023ixf: constraints on the proximate circumstellar medium |
recent observations have revealed massive galactic molecular outflows that may have the physical conditions (high gas densities) required to form stars. indeed, several recent models predict that such massive outflows may ignite star formation within the outflow itself. this star-formation mode, in which stars form wit... | star formation inside a galactic outflow |
the origin of cosmic rays in our galaxy remains a subject of active debate. while supernova remnant (snr) shocks are often invoked as the sites of acceleration, it is now widely accepted that the difficulties of such sources in reaching pev energies are daunting and it seems likely that only a subclass of rare remnants... | particle acceleration in winds of star clusters |
the origin of heavy elements produced through rapid neutron capture (`r-process’) by seed nuclei is one of the current nucleosynthesis mysteries. core collapse supernovae (cc-sne; ref. ) and compact binary mergers are considered as possible sites. the first produces small amounts of material at a high event rate wherea... | short-lived 244pu points to compact binary mergers as sites for heavy r-process nucleosynthesis |
massive stars can explode in powerful supernovae (sne) forming neutron stars but they may also collapse directly into black holes (bhs). understanding and predicting their final fate is increasingly important, e.g, in the context of gravitational-wave astronomy. the interior mixing of stars in general and convective bo... | convective-core overshooting and the final fate of massive stars |
we have simulated the collapse and evolution of the core of a solar-metallicity 40 m ⊙ star and find that it explodes vigorously by the neutrino mechanism, despite its very high "compactness." within ~1.5 s of explosion, a black hole forms. the explosion is very asymmetrical and has a total explosion energy of ~1.6 × 1... | black hole formation accompanied by the supernova explosion of a 40 m ⊙ progenitor star |
the spallation neutron source (sns) at oak ridge national laboratory provides an intense, high-quality source of neutrinos from pion decay at rest. this source was recently used for the first measurements of coherent elastic neutrino-nucleus scattering (cevns) by the coherent collaboration, which resulted in new constr... | coherent at the spallation neutron source |
we present a comprehensive analysis of strong-lensing, weak-lensing shear and magnification data for a sample of 16 x-ray-regular and 4 high-magnification galaxy clusters at 0.19≲ z≲ 0.69 selected from cluster lensing and supernova survey with hubble (clash). our analysis combines constraints from 16-band hubble space ... | clash: joint analysis of strong-lensing, weak-lensing shear, and magnification data for 20 galaxy clusters |
we present the results of a search for z = 9-10 galaxies within the first eight pointings of the hubble frontier fields (hff) survey and 20 cluster fields from the cluster lensing and supernova survey with hubble (clash) survey. combined with our previous analysis of the hubble ultra deep field, we have now completed a... | the z = 9-10 galaxy population in the hubble frontier fields and clash surveys: the z = 9 luminosity function and further evidence for a smooth decline in ultraviolet luminosity density at z≥ 8 |
the cosmic merger rate density of black hole binaries (bhbs) can give us an essential clue to constraining the formation channels of bhbs, in light of current and forthcoming gravitational wave detections. following a monte carlo approach, we couple new population-synthesis models of bhbs with the illustris cosmologica... | the cosmic merger rate of stellar black hole binaries from the illustris simulation |
recently, constructing van der waals (vdw) heterojunctions by stacking different two-dimensional (2d) materials has been considered to be effective strategy to obtain the desired properties. here, through first-principles calculations, we find theoretically that the 2d n -inse/p -gese(sns) vdw heterojunctions are the d... | two-dimensional n -inse/p -gese(sns) van der waals heterojunctions: high carrier mobility and broadband performance |
double white dwarf (dwd) binaries are expected to be very common in the milky way, but their intrinsic faintness challenges the detection of these systems. currently, only a few tens of detached dwds are know. such systems offer the best chance of extracting the physical properties that would allow us to address a weal... | prospects for detection of detached double white dwarf binaries with gaia, lsst and lisa |
we investigate whether the 4.4σ tension on h0 between sh0es 2019 and planck 2018 can be alleviated by a variation of newton's constant gn between the early and the late universe. this changes the expansion rate before recombination, similarly to the addition of δ neff extra relativistic degrees of freedom. we implement... | the h0 tension: δ gn vs. δ neff |
we present observations of asassn-19dj, a nearby tidal disruption event (tde) discovered in the post-starburst galaxy kug 0810+227 by the all-sky automated survey for supernovae (asas-sn) at a distance of d ≃ 98 mpc. we observed asassn-19dj from -21 to 392 d relative to peak ultraviolet (uv)/optical emission using high... | discovery and follow-up of asassn-19dj: an x-ray and uv luminous tde in an extreme post-starburst galaxy |
neutron star mergers have been long considered as promising sites of heavy r-process nucleosynthesis. we overview the observational evidence supporting this scenario including: the total amount of r-process elements in the galaxy, extreme metal-poor stars, geological radioactive elemental abundances, dwarf galaxies and... | neutron star mergers as sites of r-process nucleosynthesis and short gamma-ray bursts |
we use the physically consistent tilted spatially flat and untilted non-flat λcdm inflation models to constrain cosmological parameter values with the planck 2015 cosmic microwave background (cmb) anisotropy data and recent sne ia measurements, baryonic acoustic oscillations (bao) data, growth rate observations, and hu... | using the tilted flat-λcdm and the untilted non-flat λcdm inflation models to measure cosmological parameters from a compilation of observational data |
recent theoretical work indicates that the neutrino radiation in core-collapse supernovae may be susceptible to flavor instabilities that set in far behind the shock, grow extremely rapidly, and have the potential to profoundly affect supernova dynamics and composition. here we analyze the nonlinear collective oscillat... | neutrino oscillations in supernovae: angular moments and fast instabilities |
evolutionary models have shown the substantial effect that strong mass-loss rates ( $\dot{m}$ s) can have on the fate of massive stars. red supergiant (rsg) mass-loss is poorly understood theoretically, and so stellar models rely on purely empirical $\dot{m}$ -luminosity relations to calculate evolution. empirical pres... | a new mass-loss rate prescription for red supergiants |
we investigate the thermal cosmology and terrestrial and astrophysical phenomenology of a sub-gev hadrophilic dark sector. the specific construction explored in this work features a dirac fermion dark matter candidate interacting with a light scalar mediator that dominantly couples to the up-quark. the correct freeze-o... | probing light dark matter with a hadrophilic scalar mediator |
we analyze brans-dicke gravity with a cosmological constant, λ, and cold dark matter (bd-λcdm) in the light of the latest cosmological observations on distant supernovae, hubble rate measurements at different redshifts, baryonic acoustic oscillations, large-scale structure formation data, gravitational weak-lensing, an... | brans-dicke gravity with a cosmological constant smoothes out λcdm tensions |
realistic models of the galactic double white dwarf (dwd) population are crucial for testing and quantitatively defining the science objectives of the laser interferometer space antenna (lisa), a future european space agency's gravitational-wave observatory. in addition to numerous individually detectable dwds, lisa wi... | observationally driven galactic double white dwarf population for lisa |
we examine the scalings of galactic outflows with halo mass across a suite of 20 high-resolution cosmological zoom galaxy simulations covering halo masses in the range {10}9.5{--}{10}12 {m}⊙ . these simulations self-consistently generate outflows from the available supernova energy in a manner that successfully reprodu... | in-n-out: the gas cycle from dwarfs to spiral galaxies |
an excess of ∼10 - 20 gev cosmic-ray antiprotons has been identified in the spectrum reported by the ams-02 collaboration. the systematic uncertainties associated with this signal, however, have made it difficult to interpret these results. in this paper, we revisit the uncertainties associated with the time, charge an... | a robust excess in the cosmic-ray antiproton spectrum: implications for annihilating dark matter |
we use the largest sample to date of spectroscopic supernova (sn) ia distances and redshifts to look for evidence in the hubble diagram of large-scale outflows caused by local voids suggested to exist at z < 0.15. our sample combines data from the pantheon sample with the foundation survey, and the most recent relea... | the local perspective on the hubble tension: local structure does not impact measurement of the hubble constant |
we report the discovery of a multiply imaged, gravitationally lensed type ia supernova, iptf16geu (sn 2016geu), at redshift z = 0.409. this phenomenon was identified because the light from the stellar explosion was magnified more than 50 times by the curvature of space around matter in an intervening galaxy. we used hi... | iptf16geu: a multiply imaged, gravitationally lensed type ia supernova |
red supergiants are the most common final evolutionary stage of stars that have initial masses between 8 and 35 times that of the sun1. during this stage, which lasts roughly 100,000 years1, red supergiants experience substantial mass loss. however, the mechanism for this mass loss is unknown2. mass loss may affect the... | a dusty veil shading betelgeuse during its great dimming |
we perform systematic investigation on the geometric, energetic, and electronic properties of group iv-vi binary monolayers (xy ), which are the counterparts of phosphorene, by employing density functional theory based electronic structure calculations. for this purpose, we choose the binary systems x y consisting of e... | direct band gaps in group iv-vi monolayer materials: binary counterparts of phosphorene |
we explore three sets of cosmological hydrodynamical simulations, illustristng (tng50, tng100, and tng300), eagle, and simba, to investigate the physical processes impacting the distribution of baryons in and around haloes across an unprecedented mass range of $10^8\lt m_{\rm 200c}/\rm {{\rm m}_{\odot }}\lt 10^{15}$, f... | feedback reshapes the baryon distribution within haloes, in halo outskirts, and beyond: the closure radius from dwarfs to massive clusters |
coordination-related, 2d structural phase transitions are a fascinating facet of 2d materials with structural degeneracy. phosphorene and its new phases, exhibiting unique electronic properties, have received considerable attention. the 2d group iv-iv monochalcogenides (i.e. ges, gese, sns and snse) like black phosphor... | recent progress in 2d group iv-iv monochalcogenides: synthesis, properties and applications |
we present a novel set of stellar feedback models, implemented in the moving-mesh code arepo, designed for galaxy formation simulations with near-parsec (or better) resolution. these include explicit sampling of stars from the imf, allowing feedback to be linked to individual massive stars, an improved method for the m... | efficient early stellar feedback can suppress galactic outflows by reducing supernova clustering |
gw190521 is a merger of two black holes (bhs), wherein at least one bh lies within the pair-instability (pi) mass gap, and it is difficult to form because of the effects of pi supernovae and pulsational pi (ppi). in this study, we examined the formation of gw190521-like bh-bhs under population (pop) iii environments by... | population iii binary black holes: effects of convective overshooting on formation of gw190521 |
with myriads of detection events from a prospective galactic core-collapse supernova, current and future neutrino detectors will be able to sample detailed, time-dependent neutrino fluxes and spectra. this will offer significant possibilities of inferring supernova physics from the various phases of the neutrino signal... | neutrino emission as diagnostics of core-collapse supernovae |
the ligo/virgo gravitational-wave observatories have detected at least 50 double black hole (bh) coalescences. this sample is large enough to have allowed several recent studies to draw conclusions about the implied branching ratios between isolated binaries versus dense stellar clusters as the origin of double bhs. it... | the uncertain future of massive binaries obscures the origin of ligo/virgo sources |
we use 1169 pan-starrs supernovae (sne) and 195 low-z (z < 0.1) sne ia to measure cosmological parameters. though most pan-starrs sne lack spectroscopic classifications, in a previous paper we demonstrated that photometrically classified sne can be used to infer unbiased cosmological parameters by using a bayesian m... | measuring dark energy properties with photometrically classified pan-starrs supernovae. ii. cosmological parameters |
we investigate the star formation-feedback cycle in cosmological galaxy formation simulations, focusing on the progenitors of milky way (mw)-sized galaxies. we find that in order to reproduce key properties of the mw progenitors, such as semi-empirically derived star formation histories (sfhs) and the shape of rotation... | on the interplay between star formation and feedback in galaxy formation simulations |
we study the impact of stellar winds and supernovae on the multiphase interstellar medium using three-dimensional hydrodynamical simulations carried out with flash. the selected galactic disc region has a size of (500 pc)2 × ±5 kpc and a gas surface density of 10 m⊙ pc-2. the simulations include an external stellar pot... | the silcc project - iii. regulation of star formation and outflows by stellar winds and supernovae |
gravitational transitions at low redshifts (zt<0.1 ) have been recently proposed as a solution to the hubble and growth tensions. such transitions would naturally lead to a transition in the absolute magnitude m of type ia supernovae (snia) at zt (late m transitions—l m t ) and possibly in the dark energy equation o... | late-transition versus smooth h (z )-deformation models for the resolution of the hubble crisis |
we investigate the impacts of the gravitational-wave (gw) standard siren observation of the einstein telescope (et) on constraining the total neutrino mass. we simulate 1000 gw events that would be observed by the et in its 10-year observation by taking the standard λcdm cosmology as a fiducial model. we combine the si... | impacts of gravitational-wave standard siren observation of the einstein telescope on weighing neutrinos in cosmology |
we make the case that there can be no low-redshift solution to the h0 tension. to robustly answer this question, we use a very flexible parametrization for the dark energy equation of state such that every cosmological distance still allowed by data exists within this prior volume. to then answer whether there exists a... | ruling out new physics at low redshift as a solution to the h0 tension |
gravitational waves (gws) from binary black hole (bbh) mergers provide a new probe of massive-star evolution and the formation channels of binary compact objects. by coupling the growing sample of bbh systems with population synthesis models, we can begin to constrain the parameters of such models and glean unprecedent... | constraining formation models of binary black holes with gravitational-wave observations |
improving the thermoelectric efficiency is one of the greatest challenges in materials science. the recent discovery of excellent thermoelectric performance in simple orthorhombic snse crystal offers new promise in this prospect [zhao et al. nature 508, 373 (2014)]. by calculating the thermoelectric properties of ortho... | high-efficient thermoelectric materials: the case of orthorhombic iv-vi compounds |
we introduce a new relativistic astrophysics code, spectre, that combines a discontinuous galerkin method with a task-based parallelism model. spectre's goal is to achieve more accurate solutions for challenging relativistic astrophysics problems such as core-collapse supernovae and binary neutron star mergers. the rob... | spectre: a task-based discontinuous galerkin code for relativistic astrophysics |
this paper describes the design and implementation of our new multigroup, multidimensional radiation hydrodynamics code fornax and provides a suite of code tests to validate its application in a wide range of physical regimes. instead of focusing exclusively on tests of neutrino radiation hydrodynamics relevant to the ... | fornax: a flexible code for multiphysics astrophysical simulations |
the superluminous supernova host galaxies survey aims to provide strong new constraints on the progenitors of superluminous supernovae (slsne) by understanding the relationship to their host galaxies. we present the photometric properties of 53 h-poor and 16 h-rich slsn host galaxies out to z ∼ 4. we model their spectr... | cosmic evolution and metal aversion in superluminous supernova host galaxies |
the electromagnetic observations of gw170817 were able to dramatically increase our understanding of neutron star mergers beyond what we learned from gravitational waves alone. these observations provided insight on all aspects of the merger from the nature of the gamma-ray burst to the characteristics of the ejected m... | a line-binned treatment of opacities for the spectra and light curves from neutron star mergers |
we present optical, near-infrared, and mid-infrared imaging of the host galaxy of frb 121102 with the gemini north telescope, the hubble space telescope, and the spitzer space telescope. the frb 121102 host galaxy is resolved, revealing a bright star-forming region located in the outskirts of the irregular, low-metalli... | frb 121102 is coincident with a star-forming region in its host galaxy |
recent studies suggest spectroscopic differences explain a fraction of the variation in type ia supernova (sn ia) luminosities after light-curve/color standardization. in this work, (i) we empirically characterize the variations of standardized sn ia luminosities, and (ii) we use a spectroscopically inferred parameter,... | leveraging sn ia spectroscopic similarity to improve the measurement of h 0 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.