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we use the sphinx suite of high-resolution cosmological radiation hydrodynamics simulations to study how spatially and temporally inhomogeneous reionization impacts the baryonic content of dwarf galaxies and cosmic filaments. we compare simulations with and without stellar radiation to isolate the effects of radiation ... | how to quench a dwarf galaxy: the impact of inhomogeneous reionization on dwarf galaxies and cosmic filaments |
we present the first simulations evolving resolved spectra of cosmic rays (crs) from mev-tev energies (including electrons, positrons, (anti)protons, and heavier nuclei), in live kinetic-magnetohydrodynamics galaxy simulations with star formation and feedback. we utilize new numerical methods including terms often negl... | first predicted cosmic ray spectra, primary-to-secondary ratios, and ionization rates from mhd galaxy formation simulations |
recent work has revealed that the light curves of hydrogen-poor (type i) superluminous supernovae (slsne), thought to be powered by magnetar central engines, do not always follow the smooth decline predicted by a simple magnetar spin-down model. here we present the first systematic study of the prevalence and propertie... | bumpy declining light curves are common in hydrogen-poor superluminous supernovae |
we use the state-of-the-art data on cosmic chronometers (cch) and the pantheon+compilation of supernovae of type ia (snia) to test the constancy of the snia absolute magnitude, m, and the robustness of the cosmological principle (cp) at z ≲ 2 with a model-agnostic approach. we do so by reconstructing m(z) and the curva... | cosmic chronometers to calibrate the ladders and measure the curvature of the universe. a model-independent study |
stable mass transfer from a massive post-main sequence (post-ms) donor is thought to be a short-lived event of thermal-timescale mass transfer (∼10−3 m⊙ yr−1) which within ≲104 yr strips the donor star of nearly its entire h-rich envelope, producing a hot, compact helium star. this long-standing picture is based on ste... | partial-envelope stripping and nuclear-timescale mass transfer from evolved supergiants at low metallicity |
type ia supernovae (sne ia) are more precise standardizable candles when measured in the near-infrared (nir) than in the optical. with this motivation, from 2012 to 2017 we embarked on the raisin program with the hubble space telescope (hst) to obtain rest-frame nir light curves for a cosmologically distant sample of 3... | cosmological results from the raisin survey: using type ia supernovae in the near infrared as a novel path to measure the dark energy equation of state |
feedback from core collapse supernovae (sne), the final stage of evolution of massive stars, is a key element in galaxy formation theory. the energy budget of sn feedback, as well as the duration over which sne occur, are constrained by stellar lifetime models and the minimum mass star that ends its life as a sn. simpl... | uncertainties in supernova input rates drive qualitative differences in simulations of galaxy evolution |
the search for galactic pevatrons is now a well-identified key science project of all instruments operating in the very-high-energy domain. indeed, in this energy range, the detection of gamma rays clearly indicates that efficient particle acceleration is taking place, and observations can thus help identify which astr... | the hunt for pevatrons: the case of supernova remnants |
the mismatch between the locally measured expansion rate of the universe and the one inferred from observations of the cosmic microwave background (cmb) assuming the canonical λcdm model has become the new cornerstone of modern cosmology, and many new-physics set ups are rising to the challenge. concomitant with the so... | dissecting the h0 and s8 tensions with planck + bao + supernova type ia in multi-parameter cosmologies |
we present direct n-body simulations, carried out with nbody6+ + gpu, of young and compact low-metallicity (z = 0.0002) star clusters with 1.1 × 105 stars, a velocity dispersion of ~15 $\mathrm{km\, s^{-1}}$, a half-mass radius rh = 0.6 pc, and a binary fraction of $10{{\ \rm per\,cent}}$ including updated evolution mo... | black hole mergers in compact star clusters and massive black hole formation beyond the mass gap |
we investigate the effects of agn feedback on the cosmological evolution of an isolated elliptical galaxy by performing two-dimensional high-resolution hydrodynamical numerical simulations. the inner boundary of the simulation is chosen so that the bondi radius is resolved. compared to previous works, the two accretion... | active galactic nucleus feedback in an elliptical galaxy with the most updated agn physics. i. low angular momentum case |
with the advent of modern neutrino and gravitational wave (gw) detectors, the promise of multimessenger detections of the next galactic core-collapse supernova (ccsn) has become very real. such detections will give insight into the ccsn mechanism and the structure of the progenitor star, and may resolve longstanding qu... | constraining properties of the next nearby core-collapse supernova with multimessenger signals |
we present high angular resolution (∼80 mas) alma continuum images of the sn 1987a system, together with co j = 2 \to 1, j = 6 \to 5, and sio j = 5 \to 4 to j = 7 \to 6 images, which clearly resolve the ejecta (dust continuum and molecules) and ring (synchrotron continuum) components. dust in the ejecta is asymmetric a... | high angular resolution alma images of dust and molecules in the sn 1987a ejecta |
it has been recently pointed out that neutrino fluxes from a supernova can show substantial flavor conversions almost immediately above the core. using linear stability analyses and numerical solutions of the fully nonlinear equations of motion, we perform a detailed study of these fast conversions, focussing on the re... | fast neutrino flavor conversions near the supernova core with realistic flavor-dependent angular distributions |
compact neutron star binary systems are produced from binary massive stars through stellar evolution involving up to two supernova explosions. the final stages in the formation of these systems have not been directly observed. we report the discovery of iptf 14gqr (sn 2014ft), a type ic supernova with a fast-evolving l... | a hot and fast ultra-stripped supernova that likely formed a compact neutron star binary |
we report the results of analyses of galactic outflows in a sample of 45 low-redshift starburst galaxies in the cos legacy archive spectroscopic survey (classy), augmented by five additional similar starbursts with cosmic origins spectrograph (cos) data. the outflows are traced by blueshifted absorption lines of metals... | classy iii. the properties of starburst-driven warm ionized outflows |
the milky way (mw) stellar halo contains relics of ancient mergers that tell the story of our galaxy's formation. some of them are identified due to their similarity in energy, actions, and chemistry, referred to as the "chemodynamical space," and are often attributed to distinct merger events. it is also known that ou... | gastro library. i. the simulated chemodynamical properties of several gaia-sausage-enceladus-like stellar halos |
we present light curves and classification spectra of 17 hydrogen-poor superluminous supernovae (slsne) from the pan-starrs1 medium deep survey (ps1 mds). our sample contains all objects from the ps1 mds sample with spectroscopic classification that are similar to either of the prototypes sn 2005ap or sn 2007bi, withou... | hydrogen-poor superluminous supernovae from the pan-starrs1 medium deep survey |
we present our analysis of the type ii supernova dlt16am (sn 2016ija). the object was discovered during the ongoing d< 40 {mpc} (dlt40) one-day cadence supernova search at r∼ 20.1 {mag} in the “edge-on” nearby (d=20.0+/- 4.0 {mpc}) galaxy ngc 1532. the subsequent prompt and high-cadenced spectroscopic and photometri... | the early detection and follow-up of the highly obscured type ii supernova 2016ija/dlt16am |
we here propose a new model-independent technique to overcome the circularity problem affecting the use of gamma-ray bursts (grbs) as distance indicators through the use of ep-eiso correlation. we calibrate the ep-eiso correlation and find the grb distance moduli that can be used to constrain dark energy models. we use... | addressing the circularity problem in the ep-eiso correlation of gamma-ray bursts |
we investigate the star formation history (sfh) and chemical evolution of isolated analogs of local group (lg) ultrafaint dwarf galaxies (ufds; stellar mass range of {10}2 {m}⊙ < {m}* < {10}5 {m}⊙ ) and gas-rich, low-mass dwarfs (leo p analogs; stellar mass range of {10}5 {m}⊙ < {m}* < {10}6 {m}⊙ ). we perf... | connecting the first galaxies with ultrafaint dwarfs in the local group: chemical signatures of population iii stars |
we present a detailed mass reconstruction and a novel study on the substructure properties in the core of the cluster lensing and supernova survey with hubble (clash) and frontier fields galaxy cluster macs j0416.1-2403. we show and employ our extensive spectroscopic data set taken with the visible multi-object spectro... | clash-vlt: insights on the mass substructures in the frontier fields cluster macs j0416.1-2403 through accurate strong lens modeling |
we use observational data from the pantheon supernovae sample, direct hubble constant measurements with cosmic chronometers, the cosmic microwave background shift parameter cmbshift , and redshift-space distortion (f σ8 ) measurements, in order to constrain f (t ) gravity. we do not follow the common γ parametrization ... | bayesian analysis of f (t ) gravity using f σ8 data |
star clusters interact with the interstellar medium (ism) in various ways, most importantly in the destruction of molecular star-forming clouds, resulting in inefficient star formation on galactic scales. on cloud scales, ionizing radiation creates h ii regions, while stellar winds and supernovae (sne) drive the ism in... | winds and radiation in unison: a new semi-analytic feedback model for cloud dissolution |
we investigate the cosmological applications of fluids having an equation of state which is the analog to the one related to the isotropic deformation of crystalline solids, that is containing logarithmic terms of the energy density, allowing additionally for a bulk viscosity. we consider two classes of scenarios and w... | cosmological fluids with logarithmic equation of state |
recent determination of the hubble constant via cepheid-calibrated supernovae by riess et al.find ∼3σ tension with inferences based on cosmic microwave background (cmb) temperature and polarization measurements from planck. this tension could be an indication of inadequacies in the concordance λcold dark matter model. ... | insensitivity of the distance ladder hubble constant determination to cepheid calibration modelling choices |
we present a full-fledged analysis of brans-dicke cosmology with a cosmological constant and cold dark matter (bd-λcdm for short). we extend the scenarios where the current cosmological value of the bd-field is restricted by the local astrophysical domain to scenarios where that value is fixed only by the cosmological ... | brans-dicke cosmology with a λ-term: a possible solution to λcdm tensions |
a recent report has identified a central compact object (cco) within the supernova remnant hess j1731-347, with a mass and radius of $m=0.77^{+0.20}_{-0.17}m{\odot}$ and $r=10.4^{+0.86}_{-0.78}$ km, respectively. to investigate this light compact star, a density-dependent relativistic mean-field (ddrmf) model, specific... | the hadronic equation of state of hess j1731-347 from the relativistic mean-field model with tensor coupling |
recent cosmological tensions, in particular, to infer the local value of the hubble constant $h_0$, have developed new independent techniques to constrain cosmological parameters in several cosmologies. moreover, even when the concordance cosmological constant cold dark matter ($\lambda$cdm) model has been well constra... | constraining dark energy cosmologies with spatial curvature using supernovae jwst forecasting |
the physical collisions of two white dwarfs (wds) (i.e. not slow mergers) have been shown to produce type-ia-like supernovae (sne) explosions. most studies of wd-collisions have focused on zero impact-parameter (direct) collisions, which can also be studied in 2d. however, the vast majority of wd collisions arising fro... | thermonuclear explosion criteria for direct and indirect collisions of co white dwarfs: a study of the impact-parameter threshold for detonation |
the flavor evolution of neutrinos in dense astrophysical sources, such as core-collapse supernovae or compact binary mergers, is non-linear due to the coherent forward scattering of neutrinos among themselves. recent work in this context has been addressed to figure out whether flavor equipartition could be a generic f... | perturbing fast neutrino flavor conversion |
the latest improvements in the scale and calibration of type ia supernovae catalogues allow us to constrain the specific nature and evolution of dark energy through its effect on the expansion history of the universe. we present the results of bayesian cosmological model comparison on the sne~ia catalogue pantheon+, wh... | non-gaussian likelihoods for type ia supernovae cosmology: implications for dark energy and $h_0$ |
self-consistent, time-dependent supernova (sn) simulations in three spatial dimensions (3d) are conducted with the aenus-alcar code, comparing, for the first time, calculations with fully multidimensional (fmd) neutrino transport and the ray-by-ray-plus (rbr+) approximation, both based on a two-moment solver with algeb... | three-dimensional core-collapse supernova simulations with multidimensional neutrino transport compared to the ray-by-ray-plus approximation |
the spt-3g 2018 tt/te/ee cosmic microwave background (cmb) data set (temperature and polarization) is used to place constraints on an axion-like model of early dark energy (ede). these data do not favor axion-like ede and place an upper limit on the maximum fraction of the total energy density $f_{\rm ede}< 0.172$ (... | current small-scale cmb constraints to axion-like early dark energy |
we present global fits of cosmologically stable axion-like particle and qcd axion models in the mass range 0.1 nev to 10 ev. we focus on the case where the peccei-quinn symmetry is broken before the end of inflation, such that the initial value of the axion field can be considered to be homogeneous throughout the visib... | axion global fits with peccei-quinn symmetry breaking before inflation using gambit |
the origin of the solar system abundances of several proton-rich isotopes, especially $^{92,94}$mo and $^{96,98}$ru, has been an enduring mystery in nuclear astrophysics. an attractive proposal to solve this problem is the $\nu p$-process, which can operate in neutrino-driven outflows in a core-collapse supernova after... | successful $\\nu p$-process in neutrino-driven outflows in core-collapse supernovae |
multiwavelength observations have revealed that dense, confined circumstellar material (ccsm) commonly exists in the vicinity of supernova (sn) progenitors, suggesting enhanced mass losses years to centuries before their core collapse. interacting sne, which are powered or aided by interaction with the ccsm, are consid... | interacting supernovae as high-energy multimessenger transients |
we report results from a series of three-dimensional (3d) rotational core-collapse simulations for 11.2 and 27 m⊙ stars employing neutrino transport scheme by the isotropic diffusion source approximation. by changing the initial strength of rotation systematically, we find a rotation-assisted explosion for the 27 m⊙ pr... | three-dimensional simulations of rapidly rotating core-collapse supernovae: finding a neutrino-powered explosion aided by non-axisymmetric flows |
recent works have discovered a relatively tight correlation between $\omega_{\rm m}$ and properties of individual simulated galaxies. because of this, it has been shown that constraints on $\omega_{\rm m}$ can be placed using the properties of individual galaxies while accounting for uncertainties on astrophysical proc... | cosmology with multiple galaxies |
the next milky way supernova will be an epochal event in multi-messenger astronomy, critical to tests of supernovae, neutrinos, and new physics. realizing this potential depends on having realistic simulations of core collapse. we investigate the neutrino predictions of nearly all modern models (1-, 2-, and 3-d) over t... | old data, new forensics: the first second of sn 1987a neutrino emission |
we study the coupling of hydrodynamics and reactions in simulations of the double detonation model for type ia supernovae. when assessing the convergence of simulations, the focus is usually on spatial resolution; however, the method of coupling the physics together as well as the tolerances used in integrating a react... | sensitivity of simulations of double detonation type ia supernova to integration methodology |
we explore a possible explosion scenario resulting from core collapses of rotating massive stars that leave a black hole by performing radiation-viscous-hydrodynamics simulations in numerical relativity. we take moderately and rapidly rotating compact pre-collapse stellar models with zero-age main-sequence masses of 9m... | collapse of rotating massive stars leading to black hole formation and energetic supernovae |
cosmological observations in the new millennium have dramatically increased our understanding of the universe, but several fundamental questions remain unanswered. this topical group report describes the best opportunities to address these questions over the coming decades by extending observations to the $z<6$ univ... | snowmass2021 cosmic frontier: report of the cf04 topical group on dark energy and cosmic acceleration in the modern universe |
we determine the hubble constant h0 precisely (2.3% uncertainty) in a manner independent of the cosmological model through gaussian process regression, using strong lensing and supernova data. strong gravitational lensing of a variable source can provide a time-delay distance dδt and angular diameter distance to the le... | determining model-independent h0 and consistency tests |
gravitational wave (gw) detections of binary black holes (bbhs) have shown evidence for a dearth of component black holes with masses above ∼50m⊙. this is consistent with expectations of a mass gap due to the existence of pair-instability supernovae (pisn). we argue that ground-based gw detectors will be sensitive to b... | jumping the gap: searching for ligo's biggest black holes |
context. the dominant site of production of r-process elements remains unclear despite recent observations of a neutron star merger. observational constraints on the properties of the sites can be obtained by comparing r-process abundances in different environments. the recent gaia data releases and large samples from ... | r-process enhancements of gaia-enceladus in galah dr3 |
large uncertainties in the determinations of the equation of state of dense stellar matter allow the intriguing possibility that the bulk quark matter in beta equilibrium might be the true ground state of the matter at zero pressure. and quarks will form cooper pairs very readily since the dominant interaction between ... | two-flavor color superconducting quark stars may not exist |
the main aim of this paper is to perform a model comparison for some reconstructions of the key properties that describe the dark energy of the universe i.e. energy density and the equation of state (eos). we carry out this process by using a binning and a linear interpolation methodologies, and on top of that, we inco... | model selection applied to reconstructions of the dark energy |
gravitational wave observations of binary black holes have revealed unexpected structure in the black hole mass distribution. previous studies of the mass distribution employ physically-motivated phenomenological models and infer the parameters that directly control the features of the mass distribution that are allowe... | physical models for the astrophysical population of black holes: application to the bump in the mass distribution of gravitational wave sources |
the elemental abundances between strontium and silver ($z = 38-47$) observed in the atmospheres of very metal-poor stars (vmp) in the galaxy may contain the fingerprint of the weak $r$-process and $\nu p$-process occurring in early core-collapse supernovae explosions. in this work, we combine various astrophysical cond... | neutrino-driven outflows and the elemental abundance patterns of very metal-poor stars |
a thorough understanding of neutrino cross sections in a wide range of energies is crucial for the successful execution of the entire neutrino physics program. in order to extract neutrino properties, long-baseline experiments need an accurate determination of neutrino cross sections within their detector(s). since ver... | snowmass neutrino frontier: neutrino interaction cross sections (nf06) topical group report |
the cosmic curvature $ \omega_{k,0} $ , which determines the spatial geometry of the universe, is an important parameter in modern cosmology. any deviation from $ \omega_{k,0}=0 $ would have a profound impact on the primordial inflation paradigm and fundamental physics. in this work, we adopt a cosmological model-indep... | null test for cosmic curvature using gaussian process |
the giant spiral galaxy m101 is host to the nearest recent type ia supernova (sn 2011fe) and thus has been extensively monitored in the near-infrared to study the late-time lightcurve of the supernova. leveraging this existing baseline of observations, we derive the first mira-based distance to m101 by discovering and ... | the mira distance to m101 and a 4% measurement of h0 |
we train graph neural networks to perform field-level likelihood-free inference using galaxy catalogs from state-of-the-art hydrodynamic simulations of the camels project. our models are rotational, translational, and permutation invariant and do not impose any cut on scale. from galaxy catalogs that only contain 3d po... | robust field-level likelihood-free inference with galaxies |
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 http://compose.obspm.fr. the main services, offer... | compose reference manual |
in order to better understand the relationship between feedback and galactic chemical evolution, we have developed a new model for stellar feedback at grid resolutions of only a few parsecs in global disc simulations, using the adaptive mesh refinement hydrodynamics code enzo. for the first time in galaxy-scale simulat... | simulating an isolated dwarf galaxy with multichannel feedback and chemical yields from individual stars |
current cosmological analyses, which use type ia supernova observations, combine supernova (sn) samples to expand the redshift range beyond that of a single sample and increase the overall sample size. the inhomogeneous photometric calibration between different sn samples is one of the largest systematic uncertainties ... | supercal: cross-calibration of multiple photometric systems to improve cosmological measurements with type ia supernovae |
we present a comprehensive study of an unbiased sample of 150 nearby (median redshift, z = 0.014) core-collapse supernova (ccsn) host galaxies drawn from the all-sky automated survey for supernovae (asas-sn) for direct comparison to the nearest long-duration gamma-ray burst (lgrb) and superluminous supernova (slsn) hos... | core-collapse, superluminous, and gamma-ray burst supernova host galaxy populations at low redshift: the importance of dwarf and starbursting galaxies |
using a set of high-resolution hydrodynamical simulations run with the cholla code, we investigate how mass and momentum couple to the multiphase components of galactic winds. the simulations model the interaction between a hot wind driven by supernova explosions and a cooler, denser cloud of interstellar or circumgala... | hydrodynamical coupling of mass and momentum in multiphase galactic winds |
this chapter describes the current classification scheme of supernovae (sne). this scheme has evolved over many decades and now includes numerous sn types and subtypes, many universally recognized, others controversial. the types are defined according to observational properties, mostly visible-light spectra near maxim... | observational and physical classification of supernovae |
the sno+ experiment is located 2 km underground at snolab in sudbury, canada. a low background search for neutrinoless double beta (0νββ) decay will be conducted using 780 tonnes of liquid scintillator loaded with 3.9 tonnes of natural tellurium, corresponding to 1.3 tonnes of 130te. this paper provides a general overv... | the sno+ experiment |
we present cosmological, radiation-hydrodynamics simulations of galaxy formation during the epoch of reionization in an effort towards modelling the interstellar medium (ism) and interpreting atacama large millimeter array (alma) observations. simulations with and without stellar radiation are compared at large (mpc), ... | interpreting alma observations of the ism during the epoch of reionization |
two-dimensional (2d) materials, such as transition metal dichalcogenides (tmds), black phosphorus (bp), mxene and borophene, have aroused extensive attention since the discovery of graphene in 2004. they have wide range of applications in many research fields, such as optoelectronic devices, energy storage, catalysis, ... | recent advances in anisotropic two-dimensional materials and device applications |
van der waals heterojunctions (vdwhs) have gained extensive attention because they can integrate the excellent characteristics of the stacked materials and most vdwhs exhibit type-ii band alignment. however, type-iii vdwhs with broken gaps are still very rare, which limits the development and application of two-dimensi... | effects of electric field on the electronic structures of broken-gap phosphorene/sn x2 (x = s , se ) van der waals heterojunctions |
we present the pmas/ppak integral-field supernova hosts compilation (pisco), which comprises integral field spectroscopy (ifs) of 232 supernova (sn) host galaxies that hosted 272 sne, observed over several semesters with the 3.5 m telescope at the calar alto observatory (caha). pisco is the largest collection of sn hos... | pisco: the pmas/ppak integral-field supernova hosts compilation |
we investigate the constraints on total neutrino mass in the scenario of vacuum energy interacting with cold dark matter. we focus on two typical interaction forms, i.e., q = βh ρ c and q = βh ρ λ. to avoid the occurrence of large-scale instability in interacting dark energy cosmology, we adopt the parameterized post-f... | exploring neutrino mass and mass hierarchy in the scenario of vacuum energy interacting with cold dark matte |
we adopt a cosmographic approach in order to determine spatial curvature (i.e. ωk), combining the latest release of cosmic chronometer (cc) data, the pantheon sample of type ia supernovae observations and baryon acoustic oscillation measurements. we use the expanded transverse comoving distance dm(z) as a basic functio... | general cosmography model with spatial curvature |
we will follow the two-families scenario described in the accompanying paper, in which compact stars having a very small radius and masses not exceeding about 1.5 m ⊙ are made of hadrons, while more massive compact stars are quark stars. in the present paper we discuss the dynamics of the transition of a hadronic star ... | the scenario of two families of compact stars. part 2: transition from hadronic to quark matter and explosive phenomena |
the merger of binary neutron stars (nss) ejects a small quantity of neutron-rich matter, the radioactive decay of which powers a day to week long thermal transient known as a kilonova. most of the ejecta remains sufficiently dense during its expansion that all neutrons are captured into nuclei during the r-process. how... | neutron-powered precursors of kilonovae |
the all-sky medium energy gamma-ray observatory explorer (amego-x) is designed to identify and characterize gamma rays from extreme explosions and accelerators. the main science themes include supermassive black holes and their connections to neutrinos and cosmic rays; binary neutron star mergers and the relativistic j... | all-sky medium energy gamma-ray observatory explorer mission concept |
one of the key mysteries of star formation is the origin of the stellar initial mass function (imf). the imf is observed to be nearly universal in the milky way and its satellites, and significant variations are only inferred in extreme environments, such as the cores of massive elliptical galaxies and the central mole... | effects of the environment and feedback physics on the initial mass function of stars in the starforge simulations |
we determine the proper motion of the solar system from the pantheon sample of type ia supernovae (sne). the posterior distribution of the solar system proper velocity, its direction, and relevant cosmological parameters were obtained based on the observed distance moduli, heliocentric redshifts, and positions of sne b... | inference of the cosmic rest-frame from supernovae ia |
we present analysis of the light curves (lcs) of 77 hydrogen-poor superluminous supernovae (slsne i) discovered during the zwicky transient facility phase i operation. we find that the majority (67%) of the sample can be fit equally well by both magnetar and ejecta-circumstellar medium (csm) interaction plus 56ni decay... | the hydrogen-poor superluminous supernovae from the zwicky transient facility phase i survey. ii. light-curve modeling and characterization of undulations |
during the core collapse of massive stars that do not undergo a canonical energetic explosion, some of the hydrogen envelope of a red supergiant (rsg) progenitor may infall on to the newborn black hole (bh). within the athena++ framework, we perform 3d, hydrodynamical simulations of idealized models of supergiant conve... | numerical simulations of the random angular momentum in convection: implications for supergiant collapse to form black holes |
in the present paper, we investigate the dark energy equation of state using the gaussian processes analysis method, without confining a particular parametrization. the reconstruction is carried out by adopting the background data including supernova and hubble parameter, and perturbation data from the growth rate. it ... | gaussian processes reconstruction of dark energy from observational data |
we propose to use the unique event topology and reconstruction capabilities of liquid argon time projection chambers to study sub-gev atmospheric neutrinos. the detection of low energy recoiled protons in dune allows for a determination of the leptonic c p -violating phase independent from the accelerator neutrino meas... | sub-gev atmospheric neutrinos and c p violation in dune |
we show that the number of observed voids in galaxy redshift surveys is a sensitive function of the equation of state of dark energy. using the fisher matrix formalism, we find the error ellipses in the w0-wa plane when the equation of state of dark energy is assumed to be of the form wcpl(z )=w0+waz /(1 +z ) . we fore... | counting voids to probe dark energy |
young stars typically form in star clusters, so the supernovae (sne) they produce are clustered in space and time. this clustering of sne may alter the momentum per sn deposited in the interstellar medium (ism) by affecting the local ism density, which in turn affects the cooling rate. we study the effect of multiple s... | enhanced momentum feedback from clustered supernovae |
we assess the variance of the post-collapse evolution remnants of compact, massive, low-metallicity stars, under small changes in the degrees of rotation and magnetic field of selected pre-supernova cores. these stellar models are commonly considered progenitors of long gamma-ray bursts. the fate of the protoneutron st... | magnetorotational core collapse of possible grb progenitors - ii. formation of protomagnetars and collapsars |
we present photometric and spectroscopic observations of the extraordinary gamma-ray burst (grb) 221009a in search of an associated supernova. some past grbs have shown bumps in the optical light curve that coincide with the emergence of supernova spectral features, but we do not detect any significant light-curve feat... | limit on supernova emission in the brightest gamma-ray burst, grb 221009a |
we carried out a detailed strong lensing analysis of a sub-sample of eight galaxy clusters of the cluster lensing and supernova survey with hubble (clash) in the redshift range of zcluster = [0.23 - 0.59] using extensive spectroscopic information, primarily from the multi unit spectroscopic explorer (muse) archival dat... | strong lensing models of eight clash clusters from extensive spectroscopy: accurate total mass reconstructions in the cores |
palomar gattini-ir is a new wide-field, near-infrared (nir) robotic time domain survey operating at palomar observatory. using a 30 cm telescope mounted with a h2rg detector, gattini-ir achieves a field of view (fov) of 25 sq. deg. with a pixel scale of 8.″7 in j-band. here, we describe the system design, survey operat... | palomar gattini-ir: survey overview, data processing system, on-sky performance and first results |
we study large-scale inhomogeneous perturbations and instabilities of interacting dark-energy models. past analysis of large-scale perturbative instabilities has shown that we can only test interacting dark-energy models with observational data when their parameter ranges are either wx≥-1 and ξ ≥0 , or wx≤-1 and ξ ≤0 ,... | large-scale stability and astronomical constraints for coupled dark-energy models |
the description of nuclear reactions induced by supernova neutrinos has witnessed significant progress during the recent years. on one hand this progress is due to experimental data which serve as important constraints to model calculations, on the other hand it is related to advances in nuclear modeling itself and in ... | neutrino-nucleus reactions and their role for supernova dynamics and nucleosynthesis |
we present nearly 500 days of observations of the tidal disruption event (tde) asassn-18pg, spanning from 54 days before peak light to 441 days after peak light. our data set includes x-ray, uv, and optical photometry, optical spectroscopy, radio observations, and the first published spectropolarimetric observations of... | the rise and fall of asassn-18pg: following a tde from early to late times |
we report on the impact of a probabilistic prescription for compact remnant masses and kicks on massive binary population synthesis. we find that this prescription populates the putative mass gap between neutron stars and black holes with low-mass black holes. however, evolutionary effects reduce the number of x-ray bi... | binary population synthesis with probabilistic remnant mass and kick prescriptions |
we analyze the formation and evolution of the stellar components in "eris," a 120 pc resolution cosmological hydrodynamic simulation of a late-type spiral galaxy. the simulation includes the effects of a uniform uv background, a delayed-radiative-cooling scheme for supernova feedback, and a star formation recipe based ... | building late-type spiral galaxies by in-situ and ex-situ star formation |
standard sirens are the gravitational wave (gw) analog of the astronomical standard candles and can provide powerful information about the dynamics of the universe. in this work, we simulate a catalog with 1000 standard siren events from binary neutron star mergers, within the sensitivity predicted for the third genera... | probing observational bounds on scalar-tensor theories from standard sirens |
the localization of the repeating fast radio burst (frb) 121102 to a low-metallicity dwarf galaxy at z = 0.193, and its association with a luminous quiescent radio source, suggests the possibility that frbs originate from magnetars, formed by the unusual supernovae that occur in such galaxies. we investigate this possi... | empirical constraints on the origin of fast radio bursts: volumetric rates and host galaxy demographics as a test of millisecond magnetar connection |
gamma-ray bursts (grbs), as a possible probe to extend the hubble diagram to high redshifts, have attracted much attention recently. in this paper, we select two samples of grbs that have a plateau phase in x-ray afterglow. one is short grbs (sgrbs) with plateau phases dominated by magnetic dipole (md) radiations. the ... | measuring cosmological parameters with a luminosity-time correlation of gamma-ray bursts |
this research paper deals with a transit dark energy cosmological model in f(r,lm)-gravity with observational constraints. for this, we consider a flat friedman-lamatre-robertson-walker (flrw) space-time and have taken a cosmological constant-like parameter β in our field equations. the model has two energy parameters ... | modeling transit dark energy in f(r,lm)-gravity |
we constrain spatially flat tilted and nonflat untilted scalar field (ϕ) dynamical dark energy inflation (ϕcdm) models by using planck 2015 cosmic microwave background (cmb) anisotropy measurements and recent baryonic acoustic oscillation distance observations, type ia supernovae apparent magnitude data, hubble paramet... | observational constraints on the tilted spatially flat and the untilted nonflat ϕcdm dynamical dark energy inflation models |
we propose a simple analytic model to understand when star formation is time steady versus bursty in galaxies. recent models explain the observed kennicutt-schmidt relation between star formation rate and gas surface densities in galaxies as resulting from a balance between stellar feedback and gravity. we argue that b... | a model for the origin of bursty star formation in galaxies |
dark matter direct detection experiments have poor sensitivity to a galactic population of dark matter with mass below the gev scale. however, such dark matter can be produced copiously in supernovae. since this thermally produced population is much hotter than the galactic dark matter, it can be observed with direct d... | supernova signals of light dark matter |
we present a sample of 21 hydrogen-free superluminous supernovae (slsne-i) and one hydrogen-rich slsn (slsn-ii) detected during the five-year dark energy survey (des). these sne, located in the redshift range 0.220 < z < 1.998, represent the largest homogeneously selected sample of slsn events at high redshift. w... | superluminous supernovae from the dark energy survey |
we quantify the stellar abundances of neutron-rich r-process nuclei in cosmological zoom-in simulations of a milky way-mass galaxy from the feedback in realistic environments project. the galaxy is enriched with r-process elements by binary neutron star (ns) mergers and with iron and other metals by supernovae. these c... | galactic r-process enrichment by neutron star mergers in cosmological simulations of a milky way-mass galaxy |
we present the first 4π-three-dimensional (3d) simulation of the last minutes of oxygen shell burning in an 18 m ⊙ supernova progenitor up to the onset of core collapse. a moving inner boundary is used to accurately model the contraction of the silicon and iron core according to a one-dimensional stellar evolution mode... | the last minutes of oxygen shell burning in a massive star |
the nature of the first pop iii stars is still a mystery and the energy distribution of the first supernovae is completely unexplored. for the first time we account simultaneously for the unknown initial mass function (imf), stellar mixing, and energy distribution function (edf) of pop iii stars in the context of a cos... | the energy distribution of the first supernovae |
cosmological analyses with type ia supernovae (sne ia) often assume a single empirical relation between colour and luminosity (β) and do not account for varying host-galaxy dust properties. however, from studies of dust in large samples of galaxies, it is known that dust attenuation can vary significantly. here, we tak... | the dark energy survey supernova program results: type ia supernova brightness correlates with host galaxy dust |
in recent years, several analytic models have demonstrated that simple assumptions about halo growth and feedback-regulated star formation can match the (limited) existing observational data on galaxies at $z \gtrsim6$. by extending such models, we demonstrate that imposing a time delay on stellar feedback (as inevitab... | bursty star formation during the cosmic dawn driven by delayed stellar feedback |
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