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the astrophysical origins of r-process elements remain elusive. neutron star mergers (nsms) and special classes of core-collapse supernovae (rccsne) are leading candidates. due to these channels' distinct characteristic timescales (rccsne: prompt, nsms: delayed), measuring r-process enrichment in galaxies of similar ma... | evidence from disrupted halo dwarfs that r-process enrichment via neutron star mergers is delayed by ≳500 myr |
we present updated results of the large binocular telescope search for failed supernovae. this search monitors luminous stars in 27 nearby galaxies with a current baseline of 11 yr of data. we re-discover the failed supernova (sn) candidate n6946-bh1 as well as a new candidate, m101-oc1. m101-oc1 is a blue supergiant t... | the search for failed supernovae with the large binocular telescope: a new candidate and the failed sn fraction with 11 yr of data |
we report on the lowest-frequency detection to date of three bursts from the fast radio burst frb 180916.j0158+65, observed at 328 mhz with the sardinia radio telescope (srt). the srt observed the periodic repeater frb 180916.j0158+65 for five days from 2020 february 20 to 24 during a time interval of active radio burs... | the lowest-frequency fast radio bursts: sardinia radio telescope detection of the periodic frb 180916 at 328 mhz |
we propose a new constraint on light (sub-gev) particles beyond the standard model that can be produced inside the protoneutron star core resulting from the core-collapse supernova explosion. it is derived by demanding that the energy carried by exotic particles being transferred to the progenitor stellar envelopes not... | new constraint from supernova explosions on light particles beyond the standard model |
in recent years, wide-field sky surveys providing deep multiband imaging have presented a new path for indirectly characterizing the progenitor populations of core-collapse supernovae (sne): systematic light-curve studies. we assemble a set of 76 grizy-band type iip sn light curves from pan-starrs1, obtained over a con... | toward characterization of the type iip supernova progenitor population: a statistical sample of light curves from pan-starrs1 |
the physics of cosmic rays (crs) is a promising candidate for explaining the driving of galactic winds and outflows. recent galaxy formation simulations have demonstrated the need for active cr transport either in the form of diffusion or streaming to successfully launch winds in galaxies. however, due to computational... | galactic winds driven by isotropic and anisotropic cosmic-ray diffusion in disk galaxies |
new decay channels for the neutron into dark matter plus other particles have been suggested for explaining a long-standing discrepancy between the neutron lifetime measured from trapped neutrons versus those decaying in flight. many such scenarios are already ruled out by their effects on neutron stars, and the decay ... | dark decay of the neutron |
supernovae that show evidence of strong shock interaction between their ejecta and pre-existing slower circumstellar material (csm) constitute an interesting, diverse, and still poorly understood category of explosive transients. the chief reason they are extremely interesting is because they tell us that in a subset o... | interacting supernovae: types iin and ibn |
the apparent tension between the luminosity functions of red supergiant (rsg) stars and of rsg progenitors of type ii supernovae (sne) is often referred to as the rsg problem and it motivated some to suggest that many rsgs end their life without a sn explosion. however, the luminosity functions of rsg sn progenitors pr... | a bias-corrected luminosity function for red supergiant supernova progenitor stars |
in this work, we quantify the cosmological signatures of dark energy radiation -- a novel description of dark energy, which proposes that the dynamical component of dark energy is comprised of a thermal bath of relativistic particles sourced by thermal friction from a slowly rolling scalar field. for a minimal model wi... | the cosmology of dark energy radiation |
massive stars inject mechanical and radiative energy into the surrounding environment, which stirs it up, heats the gas, produces cloud and intercloud phases in the interstellar medium, and disrupts molecular clouds (the birth sites of new stars1,2). stellar winds, supernova explosions and ionization by ultraviolet pho... | disruption of the orion molecular core 1 by wind from the massive star θ1 orionis c |
we present the discovery and early evolution of asassn-19bt, a tidal disruption event (tde) discovered by the all-sky automated survey for supernovae (asas-sn) at a distance of d ≃ 115 mpc and the first tde to be detected by tess. as the tde is located in the tess continuous viewing zone, our data set includes 30 minut... | discovery and early evolution of asassn-19bt, the first tde detected by tess |
recent observations of supernovae (sne) have indicated that a fraction of massive stars possess dense circumstellar medium (csm) at the moment of their core collapses. they suggest the presence of additional activities of the sn progenitor driving the enhancement of the mass-loss rate, and some physical processes attri... | binary interaction can yield a diversity of circumstellar media around type ii supernova progenitors |
ultra-massive white dwarfs are powerful tools used to study various physical processes in the asymptotic giant branch (agb), type ia supernova explosions, and the theory of crystallization through white dwarf asteroseismology. despite the interest in these white dwarfs, there are few evolutionary studies in the literat... | the evolution of ultra-massive white dwarfs |
the excess of electron recoil events seen by the xenon1t experiment has been interpreted as a potential signal of axion-like particles (alps), either produced in the sun, or constituting part of the dark matter halo of the milky way. it has also been explained as a consequence of trace amounts of tritium in the experim... | global fits of axion-like particles to xenon1t and astrophysical data |
we present results of three wide-band directed searches for continuous gravitational waves from 15 young supernova remnants in the first half of the third advanced ligo and virgo observing run. we use three search pipelines with distinct signal models and methods of identifying noise artifacts. without ephemerides of t... | searches for continuous gravitational waves from young supernova remnants in the early third observing run of advanced ligo and virgo |
the diffuse cosmic supernova neutrino background (dsnb) is an observational target of the gadolinium-loaded super-kamiokande (sk) detector and the forthcoming juno and hyper-kamiokande detectors. current predictions are hampered by our still incomplete understanding of the supernova (sn) explosion mechanism and of the ... | stellar collapse diversity and the diffuse supernova neutrino background |
we present in this paper a public data release of an unprecedentedly large set of core-collapse supernova (ccsn) neutrino emission models, comprising 100 detailed 2d axisymmetric radiation-hydrodynamic simulations evolved out to as late as ~5 s post-bounce and spanning an extensive range of massive-star progenitors. th... | neutrino signatures of 100 2d axisymmetric core-collapse supernova simulations |
it has been intensively discussed if modifications in the dynamics of the universe at late times are able or not able to solve the h0 tension. on the other hand, it has also been argued that the h0 tension is actually a tension on the supernova absolute magnitude mb. in this work, we robustly constrain mb using pantheo... | dark sector interaction and the supernova absolute magnitude tension |
we investigate neutrino non-radiative two-body decay in vacuum, in relation to sn1987a. in a full 3ν decay framework, we perform a detailed likelihood analysis of the 24 neutrino events from sn1987a observed by kamiokande-ii, imb, and baksan. we consider both normal and inverted neutrino mass orderings, and the possibi... | sn1987a and neutrino non-radiative decay |
the modern study of astrophysical transients has been transformed by an exponentially growing volume of data. within the last decade, the transient discovery rate has increased by a factor of ~20, with associated survey data, archival data, and metadata also increasing with the number of discoveries. to manage the data... | yse-pz: a transient survey management platform that empowers the human-in-the-loop |
the λ -cold-dark-matter (λ cdm ) model provides an excellent fit to the cosmic microwave background (cmb) data. however, a statistically significant tension emerges when its determination of the hubble constant h0 is compared to the local distance-redshift measurements. the axi-higgs model, which couples an ultralight ... | hubble constant in the axi-higgs universe |
population-synthesis codes are an unique tool to explore the parameter space of massive binary star evolution and binary compact object (bco) formation. most population-synthesis codes are based on the same stellar evolution model, limiting our ability to explore the main uncertainties. here, we present the new version... | compact object mergers: exploring uncertainties from stellar and binary evolution with sevn |
using wide-field narrow-band surveys, we provide a new measurement of the z = 6.6 lymanα emitter (lae) luminosity function (lf), which constraints the bright end for the first time. we use a combination of archival narrow-band nb921 data in uds and new nb921 measurements in sa22 and cosmos/ultravista, all observed with... | identification of the brightest lyα emitters at z = 6.6: implications for the evolution of the luminosity function in the reionization era |
cosmological models and their corresponding parameters are widely debated because of the current discrepancy between the results of the hubble constant, h0, obtained by sne ia, and the planck data from the cosmic microwave background radiation. thus, considering high redshift probes like gamma-ray bursts (grbs) is a ne... | the gamma-ray bursts fundamental plane correlation as a cosmological tool |
new physics can emerge at low energy scales, involving very light and very weakly interacting new particles. these particles can mediate interactions between neutrinos and usual matter and contribute to the wolfenstein potential relevant for neutrino oscillations. we compute the wolfenstein potential in the presence of... | wolfenstein potentials for neutrinos induced by ultra-light mediators |
we investigate the production sites and the enrichment history of r-process elements in the galaxy, as traced by the [eu/fe] ratio, using the high resolution, cosmological zoom-in simulation “eris.” at z = 0, eris represents a close analog to the milky way, making it the ideal laboratory to understand the chemical evol... | the history of r-process enrichment in the milky way |
galactic outflows are believed to play an important role in regulating star formation in galaxies, but estimates of the outflowing mass and momentum have historically been based on uncertain assumptions. here, we measure the mass, momentum and energy outflow rates of seven nearby star-forming galaxies using ultraviolet... | the mass and momentum outflow rates of photoionized galactic outflows |
we study in detail the nuclear aspects of a neutron-star merger in which deconfinement to quark matter takes place. for this purpose, we make use of the chiral mean field (cmf) model, an effective relativistic model that includes self-consistent chiral symmetry restoration and deconfinement to quark matter and, for thi... | on the deconfinement phase transition in neutron-star mergers |
we present the astrophysical science case for a space-based, decihertz gravitational-wave (gw) detector. we particularly highlight an ability to infer a source's sky location, both when combined with a network of ground-based detectors to form a long triangulation baseline, and by itself for the early warning of merger... | astrophysics and cosmology with a decihertz gravitational-wave detector: tiango |
we provide the time series and angular distributions of the neutrino and gravitational wave emissions of 11 state-of-the-art 3d non-rotating core-collapse supernova models and explore correlations between these signatures and the real-time dynamics of the shock and the proto-neutron star (pns) core. the neutrino emissi... | temporal and angular variations of 3d core-collapse supernova emissions and their physical correlations |
we present weak-lensing mass measurements of 50 x-ray luminous galaxy clusters at 0.15 ≤ z ≤ 0.3, based on uniform high-quality observations with suprime-cam mounted on the 8.2-m subaru telescope. we pay close attention to possible systematic biases, aiming to control them at the ≲4 per cent level. the dominant source ... | locuss: weak-lensing mass calibration of galaxy clusters |
we use numerical simulations to analyze the evolution and properties of superbubbles (sbs), driven by multiple supernovae (sne), that propagate into the two-phase (warm/cold), cloudy interstellar medium (ism). we consider a range of mean background densities navg=0.1--10 cm-3 and intervals between sne δ tsn=0.01-1 myr,... | superbubbles in the multiphase ism and the loading of galactic winds |
dark matter (dm) which sufficiently heats a local region in a white dwarf will trigger runaway fusion, igniting a type ia supernova (sn). in a companion paper [p. w. graham et al., phys. rev. d 98, 115027 (2018)], 10.1103/physrevd.98.115027, this instability was used to constrain dm heavier than 1 016 gev which ignites... | type ia supernovae from dark matter core collapse |
we explore properties of type ib and iib sn progenitors that are produced by stable mass transfer in binary systems using a new grid of stellar evolution models from an initial primary mass in the range of 10{--}18 {m}⊙at solar and large magellanic cloud metallicities. we find that blue and yellow supergiant sn iib pro... | type ib and iib supernova progenitors in interacting binary systems |
the cosmological principle assumes that the universe is homogeneous and isotropic on cosmic scales. there exist many works testing the cosmic homogeneity and/or the cosmic isotropy of the universe in the literature. in fact, some observational hints of the cosmic anisotropy have been claimed. however, we note that the ... | null signal for the cosmic anisotropy in the pantheon supernovae data |
we present the first self-consistent, 3d core-collapse supernova simulations performed with the prometheus-vertex code for a rotating progenitor star. besides using the angular momentum of the 15 m ⊙ model as obtained in the stellar evolution calculation with an angular frequency of ∼10-3 rad s-1 (spin period of more t... | rotation-supported neutrino-driven supernova explosions in three dimensions and the critical luminosity condition |
we introduce a new suite of simulations, `the cloud factory', which self-consistently forms molecular cloud complexes at high enough resolution to resolve internal substructure (up to 0.25 m⊙ in mass) all while including galactic-scale forces. we use a version of the arepo code modified to include a detailed treatment ... | the cloud factory i: generating resolved filamentary molecular clouds from galactic-scale forces |
we explore the three-dimensional properties of convective, luminous (l ≈ 104.5-105 l ⊙), hydrogen-rich envelopes of red supergiants (rsgs) based on radiation hydrodynamic simulations in spherical geometry using athena++. these computations comprise ≈30% of the stellar volume, include gas and radiation pressure, and sel... | numerical simulations of convective three-dimensional red supergiant envelopes |
neutrinos in supernovae, neutron stars, and in the early universe may change flavor collectively and unstably, due to neutrino-neutrino forward scattering. we prove that, for collective instability to occur, the difference of momentum distributions of two flavors must change sign, i.e., there is a zero crossing. this n... | collective neutrino flavor instability requires a crossing |
detection of black holes (bhs) with detached luminous companions (lcs) can be instrumental in connecting the bh properties with their progenitors since the latter can be inferred from the observable properties of the lc. past studies showed the promise of gaia astrometry in detecting bh-lc binaries. we build on these s... | gaia may detect hundreds of well-characterized stellar black holes |
supernova remnants exhibit shock fronts (shells) that can accelerate charged particles up to very high energies. in the past decade, measurements of a handful of shell-type supernova remnants in very high-energy gamma rays have provided unique insights into the acceleration process. among those objects, rx j1713.7-3946... | h.e.s.s. observations of rx j1713.7-3946 with improved angular and spectral resolution: evidence for gamma-ray emission extending beyond the x-ray emitting shell |
type ia supernovae are destructive explosions of carbon-oxygen white dwarfs. although they are used empirically to measure cosmological distances, the nature of their progenitors remains mysterious. one of the leading progenitor models, called the single degenerate channel, hypothesizes that a white dwarf accretes matt... | a strong ultraviolet pulse from a newborn type ia supernova |
type ia supernovae (sne) are thought to originate from the thermonuclear explosions of carbon-oxygen (co) white dwarfs (wds). the proposed progenitors of standard type ia sne have been studied for decades and can be, generally, divided into explosions of co wds accreting material from stellar non-degenerate companions ... | normal type ia supernovae from disruptions of hybrid he-co white-dwarfs by co white-dwarfs |
we assess the occurrence of fast neutrino flavor instabilities in two three-dimensional state-of-the-art core-collapse supernova simulations performed using a two-moment three-species neutrino transport scheme: one with an exploding 9 m⊙ and one with a nonexploding 20 m⊙ model. apart from confirming the presence of fas... | on the characteristics of fast neutrino flavor instabilities in three-dimensional core-collapse supernova models |
we provide a new interpretation for the bayes factor combination used in the dark energy survey (des) first year analysis to quantify the tension between the des and planck datasets. the ratio quantifies a bayesian confidence in our ability to combine the datasets. this interpretation is prior dependent, with wider pri... | quantifying tensions in cosmological parameters: interpreting the des evidence ratio |
we study the accelerated expansion phase of the universe by using the kinematic approach. in particular, the deceleration parameter q is parametrized in a model-independent way. considering a generalized parametrization for q, we first obtain the jerk parameter j (a dimensionless third time derivative of the scale fact... | observational constraints on the jerk parameter with the data of the hubble parameter |
lsst will supply up to $10^6$ supernovae (sne) to constrain dark energy through the distance-redshift ($d_l$-$z$) test. obtaining spectroscopic sn redshifts (spec-$z$s) is unfeasible; alternatives are suboptimal and may be biased. we propose a powerful multi-tracer generalization of the alcock-paczynski test that pairs... | beyond the classical distance-redshift test: cross-correlating redshift-free standard candles and sirens with redshift surveys |
multidimensional simulations show that non-radial, turbulent, fluid motion is a fundamental component of the core-collapse supernova explosion mechanism. neutrino-driven convection, the standing accretion shock instability, and relic-perturbations from advanced nuclear burning stages can all impact the outcome of core ... | turbulence in core-collapse supernovae |
the peculiar velocity field offers a unique way to probe dark matter density field on large scales at low redshifts. in this work, we have compiled a new sample of 465 peculiar velocities from low redshift ( $z$ < 0.067) type ia supernovae. we compare the reconstructed velocity field derived from the 2m++ galaxy red... | cosmic flows in the nearby universe: new peculiar velocities from sne and cosmological constraints |
the core-collapse supernova (ccsn) mechanism is fundamentally 3d, with instabilities, convection, and turbulence playing crucial roles in aiding neutrino-driven explosions. simulations of ccnse including accurate treatments of neutrino transport and sufficient resolution to capture key instabilities remain among the mo... | simulating turbulence-aided neutrino-driven core-collapse supernova explosions in one dimension |
progressive increases in the precision of the hubble-constant measurement via cepheid-calibrated type ia supernovae (sne ia) have shown a discrepancy of ~4.4σ with the current value inferred from planck satellite measurements of the cosmic microwave background radiation and the standard $\lambda $cold dark matter (λcdm... | a measurement of the hubble constant from type ii supernovae |
early-time observations of type ia supernovae (sne ia) are essential to constrain the properties of their progenitors. in this paper, we present high-quality light curves of 127 sne ia discovered by the zwicky transient facility (ztf) in 2018. we describe our method to perform forced point-spread function photometry, w... | ztf early observations of type ia supernovae. i. properties of the 2018 sample |
long γ-ray bursts are associated with energetic, broad-lined, stripped-envelope supernovae1,2 and as such mark the death of massive stars. the scarcity of such events nearby and the brightness of the γ-ray burst afterglow, which dominates the emission in the first few days after the burst, have so far prevented the stu... | signatures of a jet cocoon in early spectra of a supernova associated with a γ-ray burst |
we present the feedback acting on baryons in large-scale environments suite of cosmological hydrodynamical simulations of galaxies, groups, and clusters. the simulations use the arepo moving-mesh code with a set of physical models for galaxy formation based on the successful illustris simulation, but with updated activ... | the fable simulations: a feedback model for galaxies, groups, and clusters |
we present extensive datasets for a class of intermediate-luminosity optical transients known as luminous red novae. they show double-peaked light curves, with an initial rapid luminosity rise to a blue peak (at -13 to -15 mag), which is followed by a longer-duration red peak that sometimes is attenuated, resembling a ... | luminous red novae: stellar mergers or giant eruptions? |
we introduce a dust model for cosmological simulations implemented in the moving-mesh code arepo and present a suite of cosmological hydrodynamical zoom-in simulations to study dust formation within galactic haloes. our model accounts for the stellar production of dust, accretion of gas-phase metals on to existing grai... | dust formation in milky way-like galaxies |
we construct data-driven solutions to the hubble tension which are perturbative modifications to the fiducial λ cdm cosmology, using the fisher bias formalism. taking as proof of principle the case of a time-varying electron mass and fine structure constant, and focusing first on planck cmb data, we demonstrate that a ... | what it takes to solve the hubble tension through modifications of cosmological recombination |
the fermi gamma-ray space telescope has revealed a diffuse γ-ray background at energies from 0.1 gigaelectronvolt to 1 teraelectronvolt, which can be separated into emission from our galaxy and an isotropic, extragalactic component1. previous efforts to understand the latter have been hampered by the lack of physical m... | the diffuse γ-ray background is dominated by star-forming galaxies |
very high energy (vhe) emission is usually interpreted in the synchrotron self-compton scenario and expected from the low-redshift and high-luminosity gamma-ray bursts (grbs), such as grb 180720b and grb 190114c. recently, the h.e.s.s. telescopes reported vhe emission from one of the closest bursts, grb 190829a, which ... | on the origin of the multi-gev photons from the closest burst with intermediate luminosity: grb 190829a |
half of the chemical elements heavier than iron are produced by the rapid neutron capture process (r-process). the sites and yields of this process are disputed, with candidates including some types of supernovae (sne) and mergers of neutron stars. we search for two isotopic signatures in a sample of pacific ocean crus... | 60fe and 244pu deposited on earth constrain the r-process yields of recent nearby supernovae |
in this paper, we consider the effects of adding curvature in extended cosmologies involving a free-to-vary neutrino sector and different parametrizations of dark energy (de). we make use of the planck 2018 cosmic microwave background temperature and polarization data, baryon acoustic oscillations and pantheon type ia ... | revealing the effects of curvature on the cosmological models |
contrary to the standard lore, there is mounting observational evidence that feedback from active galactic nuclei (agn) may also play a role at the low-mass end of the galaxy population. we investigate this using the cosmological simulation suite fable, with a particular focus on the dwarf regime (mstellar < 109.5 m... | a little fable: exploring agn feedback in dwarf galaxies with cosmological simulations |
we explain the multiple populations recently found in the `prototype' globular cluster (gc) ngc 2808 in the framework of the asymptotic giant branch (agb) scenario. the chemistry of the five - or more - populations is approximately consistent with a sequence of star formation events, starting after the type ii supernov... | a single model for the variety of multiple-population formation(s) in globular clusters: a temporal sequence |
we model a compact black hole-accretion disk system in the collapsar scenario with full transport, frequency dependent, general relativistic radiation magnetohydrodynamics. we examine whether or not winds from a collapsar disk can undergo rapid neutron capture (r-process) nucleosynthesis and significantly contribute to... | full transport general relativistic radiation magnetohydrodynamics for nucleosynthesis in collapsars |
with the largest spectroscopic galaxy survey volume drawn from the sdss-iii baryon oscillation spectroscopic survey (boss), we can extract cosmological constraints from the measurements of redshift and geometric distortions at quasi-linear scales (e.g. above 50 h-1 mpc). we analyse the broad-range shape of the monopole... | the clustering of galaxies in the sdss-iii baryon oscillation spectroscopic survey: single-probe measurements from cmass anisotropic galaxy clustering |
the predicted strong piezoelectricity for monolayers of group iv monochalcogenides, together with their inherent flexibility, makes them likely candidates for developing flexible nanogenerators. within this group, sns is a potential choice for such nanogenerators due to its favourable semiconducting properties. to date... | liquid metal-based synthesis of high performance monolayer sns piezoelectric nanogenerators |
we introduce a family of equations of state (eos) for hybrid neutron star (ns) matter that is obtained by a two-zone parabolic interpolation between a soft hadronic eos at low densities and a stiff quark matter eos with color superconductivity at high densities within a finite region of baryonic chemical potentials μbh... | a new class of hybrid eos with multiple critical endpoints for simulations of supernovae, neutron stars and their mergers |
we present 2d hydrodynamics simulations of near-chandrasekhar-mass white dwarf (wd) models for type ia supernovae (sne ia) using the turbulent deflagration model with a deflagration-to-detonation transition (ddt). we perform a parameter survey for 41 models to study the effects of the initial central density (i.e., wd ... | explosive nucleosynthesis in near-chandrasekhar-mass white dwarf models for type ia supernovae: dependence on model parameters |
we report on studies of classical nova (cn) explosions where we follow the evolution of thermonuclear runaways (tnrs) on carbon-oxygen (co) white dwarfs (wds). we vary both the mass of the wd (from 0.6 m⊙ to 1.35 m⊙) and the composition of the accreted material. our simulations are guided by the results of multidimensi... | carbon-oxygen classical novae are galactic 7li producers as well as potential supernova ia progenitors |
we address the origin of the golden mass and time for galaxy formation and the onset of rapid black-hole growth. the preferred dark-halo mass of ~$10^{12}m_\odot$ is translated to a characteristic epoch, z~2, at which the typical forming halos have a comparable mass. we put together a coherent picture based on existing... | origin of the golden mass of galaxies and black holes |
neutrinos drive core-collapse supernovae, launch outflows from neutron star merger accretion disks, and set the ratio of protons to neutrons in ejecta from both systems that generate heavy elements in the universe. neutrinos of different flavors interact with matter differently, and much recent work has suggested that ... | particle-in-cell simulation of the neutrino fast flavor instability |
we have constructed a nuclear equation of state (eos) that includes a full nuclear ensemble for use in core-collapse supernova simulations. it is based on the eos for uniform nuclear matter that two of the authors derived recently, applying a variational method to realistic two- and three-body nuclear forces. we have e... | a new equation of state for core-collapse supernovae based on realistic nuclear forces and including a full nuclear ensemble |
the foundation supernova survey aims to provide a large, high-fidelity, homogeneous, and precisely calibrated low-redshift type ia supernova (sn ia) sample for cosmology. the calibration of the current low-redshift sn sample is the largest component of systematic uncertainties for sn cosmology, and new data are necessa... | the foundation supernova survey: motivation, design, implementation, and first data release |
neutrinos in a core-collapse supernova can undergo fast flavor conversions with a possible impact on the explosion mechanism and nucleosynthesis. we perform the first nonlinear simulations of fast conversions in the presence of three neutrino flavors. the recent supernova simulations with muon production call for such ... | mu-tau neutrinos: influencing fast flavor conversions in supernovae |
the flavor transformation in a dense neutrino gas can have a significant impact on the physical and chemical evolution of its surroundings. in this work we demonstrate that a dynamic, fast flavor oscillation wave can develop spontaneously in a one-dimensional (1d) neutrino gas when the angular distributions of the elec... | dynamic fast flavor oscillation waves in dense neutrino gases |
to better understand the impact of supernova (sn) explosions on the evolution of galaxies, we perform a suite of high-resolution (12 pc), zoom-in cosmological simulations of a milky way-like galaxy at z = 3 with adaptive mesh refinement. we find that sn explosions can efficiently regulate star formation, leading to the... | towards simulating star formation in turbulent high-z galaxies with mechanical supernova feedback |
explosive astrophysical systems - such as supernovae or compact star binary mergers - provide conditions where exotic degrees of freedom can be populated. within the covariant density functional theory of nuclear matter we build several general purpose equations of state which, in addition to the baryonic octet, accoun... | equations of state for hot neutron stars-ii. the role of exotic particle degrees of freedom |
there is mounting evidence that neutrinos undergo fast flavor conversion (ffc) in core-collapse supernova (ccsn). in this paper, we investigate the roles of stellar rotation on the occurrence of ffc by carrying out axisymmetric ccsn simulations with full boltzmann neutrino transport. our result suggests that electron n... | prospects of fast flavor neutrino conversion in rotating core-collapse supernovae |
the all-sky automated survey for supernovae (asas-sn) began observing in late-2011 and has been imaging the entire sky with nightly cadence since late 2017. a core goal of asas-sn is to release as much useful data as possible to the community. working towards this goal, in 2017 the first asas-sn sky patrol was establis... | asas-sn sky patrol v2.0 |
the explosion outcome and diagnostics of core-collapse supernovae depend sensitively on the nature of the stellar progenitor, but most studies to date have focused exclusively on one-dimensional, spherically symmetric massive star progenitors. we present some of the first core-collapse supernovae simulations of three-d... | the collapse and three-dimensional explosion of three-dimensional massive-star supernova progenitor models |
we present two hydrogen-rich superluminous supernovae (slsne): sn2103hx and ps15br. these objects, together with sn2008es, are the only slsne showing a distinct, broad h α feature during the photospheric phase; also, they show no sign of strong interaction between fast moving ejecta and circumstellar shells in their ea... | on the nature of hydrogen-rich superluminous supernovae |
we introduce the stars and multiphase gas in galaxies - smuggle model, an explicit and comprehensive stellar feedback model for the moving-mesh code arepo. this novel sub-resolution model resolves the multiphase gas structure of the interstellar medium and self-consistently generates gaseous outflows. the model impleme... | simulating the interstellar medium and stellar feedback on a moving mesh: implementation and isolated galaxies |
we present an open-source update to the spherically symmetric, general-relativistic hydrodynamics, core-collapse supernova (ccsn) code gr1d. the source code is available at http://www.gr1dcode.org. we extend its capabilities to include a general-relativistic treatment of neutrino transport based on the moment formalism... | an open-source neutrino radiation hydrodynamics code for core-collapse supernovae |
context. in the course of the turn off primordial stars (topos) survey, aimed at discovering the lowest metallicity stars, we have found several carbon-enhanced metal-poor (cemp) stars. these stars are very common among the stars of extremely low metallicity and provide important clues to the star formation processes. ... | topos . ii. on the bimodality of carbon abundance in cemp stars implications on the early chemical evolution of galaxies |
many core-collapse supernova (sn) progenitors show indications of enhanced pre-sn mass loss and outbursts, some of which could be powered by wave energy transport within the progenitor star. depending on the star's structure, convectively excited waves driven by late-stage nuclear burning can carry substantial energy f... | a diversity of wave-driven presupernova outbursts |
we present detailed radio observations of the tidal disruption event (tde) at2019dsg, obtained with the karl g. jansky very large array (vla) and the atacama large millimeter/submillimeter array (alma), and spanning 55-560 days post disruption. we find that the peak brightness of the radio emission increases until ~200... | radio observations of an ordinary outflow from the tidal disruption event at2019dsg |
we construct barrow holographic dark energy in the case of nonflat universe. in particular, considering closed and open spatial geometry we extract the differential equations that determine the evolution of the dark-energy density parameter, and we provide the analytical expression for the corresponding dark energy equ... | barrow holographic dark energy in a nonflat universe |
we present strong bounds on the sum of three active neutrino masses (∑mν) using selected cosmological datasets and priors in various cosmological models. we use the following baseline datasets: cosmic microwave background (cmb) temperature data from planck 2015, baryon acoustic oscillations measurements from sdss-iii b... | updated bounds on sum of neutrino masses in various cosmological scenarios |
context. both multi-messenger astronomy and new high-throughput wide-field surveys require flexible tools for the selection and analysis of astrophysical transients.aims: here we introduce the alert management, photometry, and evaluation of light curves (ampel) system, an analysis framework designed for high-throughput... | transient processing and analysis using ampel: alert management, photometry, and evaluation of light curves |
peculiar velocities of objects in the nearby universe are correlated due to the gravitational pull of large-scale structure. by measuring these velocities, we have a unique opportunity to test the cosmological model at the lowest redshifts. we perform this test, using current data to constrain the amplitude of the ``si... | testing λcdm at the lowest redshifts with sn ia and galaxy velocities |
two-dimensional (2d) materials may have potential applications in thermoelectric devices. in this work, the thermoelectric properties of orthorhombic group iv-vi monolayers ab (a = ge and sn; b = s and se) are systematically investigated by the first-principles calculations and semiclassical boltzmann transport theory.... | thermoelectric properties of orthorhombic group iv-vi monolayers from the first-principles calculations |
the detection rate of electromagnetic (em) and gravitational wave (gw) transients is growing exponentially. as the accuracy of the transient rates will significantly improve over the coming decades, so will our understanding of their evolution through cosmic history. to this end, we present predicted rates for em and g... | estimating transient rates from cosmological simulations and bpass |
new early dark energy (nede) makes the cosmic microwave background consistent with a higher value of the hubble constant inferred from supernovae observations. it is a better alternative to the old ede model because it explains naturally the decay of the extra energy component in terms of a vacuum first-order phase tra... | hot new early dark energy |
neutrino-neutrino forward scatterings potentially induce collective neutrino oscillation in dense neutrino gases in astrophysical sites such as core-collapse supernovae (ccsne) and binary neutron star mergers (bnsms). in this paper, we present a detailed study of fast neutrino-flavor conversion (ffc), paying special at... | simple method for determining asymptotic states of fast neutrino-flavor conversion |
context. it is well known that massive o stars are frequently (if not always) found in binary or higher-order multiple systems, but this fact has been less robustly investigated for the lower mass range of the massive stars, represented by b-type stars. obtaining the binary fraction and orbital parameter distributions ... | the observed multiplicity properties of b-type stars in the galactic young open cluster ngc 6231 |
natal kicks are one of the most debated issues about double neutron star (dns) formation. several observational and theoretical results suggest that some dnss have formed with low natal kicks (≲ 50 km s-1), which might be attributed to electron-capture supernovae (ecsne). we investigate the impact of ecsne on the forma... | the impact of electron-capture supernovae on merging double neutron stars |
the hubble constant tension problem is analyzed in the framework of a class of modified gravity, the so-called f (r) gravity. to do so, we explore two models: an exponential and a power-law f (r) gravities, which includes an early dark energy (ede) term in the latter. these models can describe both an early time inflat... | analyzing the h0 tension in f(r) gravity models |
we investigate kaniadakis-holographic dark energy by confronting it with observations. we perform a markov chain monte carlo analysis using cosmic chronometers, supernovae type ia, and baryon acoustic oscillations data. concerning the kaniadakis parameter, we find that it is constrained around zero, namely around the v... | kaniadakis-holographic dark energy: observational constraints and global dynamics |
in this paper, we analyze the neutrino-driven winds that emerge in 12 unprecedentedly long-duration 3d core-collapse supernova simulations done using the code fornax. the 12 models cover progenitors with zero-age main-sequence mass between 9 and 60 solar masses. in all our models, we see transonic outflows that are at ... | neutrino-driven winds in three-dimensional core-collapse supernova simulations |
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