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type ia supernovae (sne ia) play a prominent role in understanding the evolution of the universe. they are thought to be thermonuclear explosions of mass-accreting carbon-oxygen white dwarfs (co wds) in binaries, although the mass donors of the accreting wds are still not well determined. in this article, i review rece... | mass-accreting white dwarfs and type ia supernovae |
we present results from simulations of core-collapse supernovae in flash using a newly implemented multidimensional neutrino transport scheme and a newly implemented general relativistic (gr) treatment of gravity. we use a two-moment method with an analytic closure (so-called m1 transport) for the neutrino transport. t... | two-dimensional core-collapse supernova explosions aided by general relativity with multidimensional neutrino transport |
we present the results from a search for gravitational-wave transients associated with core-collapse supernovae observed within a source distance of approximately 20 mpc during the first and second observing runs of advanced ligo and advanced virgo. no significant gravitational-wave candidate was detected. we report th... | optically targeted search for gravitational waves emitted by core-collapse supernovae during the first and second observing runs of advanced ligo and advanced virgo |
context. the efficiency of the different processes responsible for the evolution of interstellar dust on the scale of a galaxy are, to date, very uncertain, spanning several orders of magnitude in the literature. yet, precise knowledge of the grain properties is key to addressing numerous open questions about the physi... | a nearby galaxy perspective on dust evolution. scaling relations and constraints on the dust build-up in galaxies with the dustpedia and dgs samples |
we present observations of sn 2021csp, a unique supernova (sn) which displays evidence for interaction with h- and he- poor circumstellar material (csm) at early times. using high-cadence spectroscopy taken over the first week after explosion, we show that the spectra of sn 2021csp are dominated by c iii lines with a v... | sn 2021csp -- the explosion of a stripped envelope star within a h and he-poor circumstellar medium |
non-standard neutrino interactions with a massive boson can produce the bosons in the core of core-collapse supernovae (sne). after the emission of the bosons from the sn core, their subsequent decays into neutrinos can modify the sn neutrino flux. we show future observations of neutrinos from a next galactic sn in sup... | probing non-standard neutrino interactions with a light boson from next galactic and diffuse supernova neutrinos |
a novel analysis is performed, incorporating time-of-flight (tof) information to study the interactions of dark matter (dm) with standard model particles. after supernova (sn) explosions, dm with mass mχ≲o (mev ) in the halo can be boosted by sn neutrinos (sn ν ) to relativistic speed. the sn ν boosted dm (bdm) arrives... | searching for afterglow: light dark matter boosted by supernova neutrinos |
the kbc void is a local underdensity with the observed relative density contrast δ ≡ 1 - ρ/ρ0 = 0.46 ± 0.06 between 40 and 300 mpc around the local group. if mass is conserved in the universe, such a void could explain the 5.3σ hubble tension. however, the mxxl simulation shows that the kbc void causes 6.04σ tension wi... | the kbc void and hubble tension contradict λcdm on a gpc scale - milgromian dynamics as a possible solution |
we investigate the explosion of stars with zero-age main-sequence masses between 20 and 35 m⊙ and varying degrees of rotation and magnetic fields including ones commonly considered progenitors of gamma-ray bursts (grbs). the simulations, combining special relativistic magnetohydrodynamics, a general relativistic approx... | magnetorotational core collapse of possible grb progenitors - i. explosion mechanisms |
we investigated r-process nucleosynthesis in magneto-rotational supernovae, based on a new explosion mechanism induced by the magneto-rotational instability (mri). a series of axisymmetric magneto-hydrodynamical simulations with detailed microphysics including neutrino heating is performed, numerically resolving the mr... | the intermediate r-process in core-collapse supernovae driven by the magneto-rotational instability |
we present a new approach to understand the landscape of supernova explosion energies, ejected nickel masses, and neutron star birth masses. in contrast to other recent parametric approaches, our model predicts the properties of neutrino-driven explosions based on the pre-collapse stellar structure without the need for... | a simple approach to the supernova progenitor-explosion connection |
several stellar systems (white dwarfs, red giants, horizontal branch stars and possibly the neutron star in the supernova remnant cassiopeia a) show a mild preference for a non-standard cooling mechanism when compared with theoretical models. this exotic cooling could be provided by weakly interacting slim particles (w... | cool wisps for stellar cooling excesses |
the coherent collaboration's primary objective is to measure coherent elastic neutrino-nucleus scattering (cevns) using the unique, high-quality source of tens-of-mev neutrinos provided by the spallation neutron source (sns) at oak ridge national laboratory (ornl). in spite of its large cross section, the cevns process... | the coherent experiment at the spallation neutron source |
we present x-ray and radio observations of the fast blue optical transient crts-css161010 j045834-081803 (css161010 hereafter) at t = 69-531 days. css161010 shows luminous x-ray (lx ∼ 5 × 1039 erg s-1) and radio (lν ∼ 1029 erg s-1 hz-1) emission. the radio emission peaked at ∼100 days post-transient explosion and rapid... | a mildly relativistic outflow from the energetic, fast-rising blue optical transient css161010 in a dwarf galaxy |
we present the nucleosynthesis of magneto-rotational supernovae (mr-sne) including neutrino-driven and magneto-rotational-driven ejecta based, for the first time, on 2d simulations with accurate neutrino transport. the models analysed here have different rotation and magnetic fields, allowing us to explore the impact o... | nucleosynthesis in magneto-rotational supernovae |
the china jinping underground laboratory (cjpl), which has the lowest cosmic-ray muon flux and the lowest reactor neutrino flux of any laboratory, is ideal to carry out low-energy neutrino experiments. with two detectors and a total fiducial mass of 2000 tons for solar neutrino physics (equivalently, 3000 tons for geo-... | physics prospects of the jinping neutrino experiment |
the neutrino-heated "gain layer" immediately behind the stalled shock in a core-collapse supernova is unstable to high-reynolds-number turbulent convection. we carry out and analyze a new set of 19 high-resolution three-dimensional (3d) simulations with a three-species neutrino leakage/heating scheme and compare with s... | the role of turbulence in neutrino-driven core-collapse supernova explosions |
many statistical models in cosmology can be simulated forwards but have intractable likelihood functions. likelihood-free inference methods allow us to perform bayesian inference from these models using only forward simulations, free from any likelihood assumptions or approximations. likelihood-free inference generical... | massive optimal data compression and density estimation for scalable, likelihood-free inference in cosmology |
presently, a >3σ tension exists between values of the hubble constant h0 derived from analysis of fluctuations in the cosmic microwave background by planck, and local measurements of the expansion using calibrators of type ia supernovae (sne ia). we perform a blinded re-analysis of riess et al. (2011) to measure h0 ... | a blinded determination of h0 from low-redshift type ia supernovae, calibrated by cepheid variables |
narrow transient emission lines (flash-ionization features) in early supernova (sn) spectra trace the presence of circumstellar material (csm) around the massive progenitor stars of core-collapse sne. the lines disappear within days after the sn explosion, suggesting that this material is spatially confined, and origin... | the prevalence and influence of circumstellar material around hydrogen-rich supernova progenitors |
radiative feedback (rfb) from stars plays a key role in galaxies, but remains poorly understood. we explore this using high-resolution, multifrequency radiation-hydrodynamics (rhd) simulations from the feedback in realistic environments (fire) project. we study ultrafaint dwarf through milky way mass scales, including ... | radiative stellar feedback in galaxy formation: methods and physics |
neutrinos are believed to have a key role in the explosion mechanism of core-collapse supernovae as they carry most of the energy released by the gravitational collapse of a massive star. if their flavor is converted fast inside the neutrino sphere, the supernova explosion may be influenced. this paper is reporting the... | fast collective neutrino oscillations inside the neutrino sphere in core-collapse supernovae |
if type ia supernovae (sne~ia) result from a white dwarf being ignited by roche lobe overflow from a nondegenerate companion, then as the supernova explosion runs into the companion star its ejecta will be shocked, causing an early blue excess in the lightcurve. a handful of these excesses have been found in single-obj... | early lightcurves of type ia supernovae are consistent with nondegenerate progenitor companions |
the angular momentum (am) content of massive stellar cores helps us to determine the natal spin rates of neutron stars and black holes. asteroseismic measurements of low-mass stars have proven that stellar cores rotate slower than predicted by most prior work, so revised models are necessary. in this work, we apply an ... | the spins of compact objects born from helium stars in binary systems |
in extreme astrophysical environments such as core-collapse supernovae and binary neutron star mergers, neutrinos play a major role in driving various dynamical and microphysical phenomena, such as baryonic matter outflows, the synthesis of heavy elements, and the supernova explosion mechanism itself. the interactions ... | quantum information and quantum simulation of neutrino physics |
we revise gamma-ray limits on axion-like particles (alps) emitted from supernova sn1987a based on solar maximum mission data. we improve and simplify the computation of the expected gamma-ray signal from alp decays, while also extending it to non-instantaneous alp emission. for the first time we make use of the tempora... | updated constraints on axion-like particles from temporal information in supernova sn1987a gamma-ray data |
what is the origin of the oxygen we breathe, the hydrogen and oxygen (in form of water h2o) in rivers and oceans, the carbon in all organic compounds, the silicon in electronic hardware, the calcium in our bones, the iron in steel, silver and gold in jewels, the rare earths utilized, e.g. in magnets or lasers, lead or ... | origin of the elements |
tin sulfide (sns) is a promising absorber material for solar energy harvesting owing to the high absorption coefficient. here, a novel inverted planar heterostructure of sns based solar cell (ito/niox/sns/zno/al) has been proposed for better efficiency among the different electron transport layers (etls), pcbm, c60, ce... | highly efficient sns-based inverted planar heterojunction solar cell with zno etl |
supernovae and their remnants are a central problem in astrophysics due to their role in the stellar evolution and nuclear synthesis. a supernova's explosion is driven by a blast wave causing the development of rayleigh-taylor and richtmyer-meshkov instabilities and leading to intensive interfacial mixing of materials ... | supernova, nuclear synthesis, fluid instabilities, and interfacial mixing |
heavy axion-like particles (alps), with masses ma gtrsim 100 kev, coupled with photons, would be copiously produced in a supernova (sn) core via primakoff process and photon coalescence. using a state-of-the-art sn model, we revisit the energy-loss sn 1987a bounds on axion-photon coupling. moreover, we point out that h... | heavy axion-like particles and core-collapse supernovae: constraints and impact on the explosion mechanism |
we assemble a sample of 24 hydrogen-poor superluminous supernovae (slsne). parameterizing the light-curve shape through rise and decline time-scales shows that the two are highly correlated. magnetar-powered models can reproduce the correlation, with the diversity in rise and decline rates driven by the diffusion time-... | on the diversity of superluminous supernovae: ejected mass as the dominant factor |
the distance ladder using supernovae yields higher values of the hubble constant h0 than those inferred from measurements of the cosmic microwave background (cmb) and galaxy surveys, a discrepancy that has come to be known as the "hubble tension". this has motivated the exploration of extensions to the standard cosmolo... | trouble beyond h0 and the new cosmic triangles |
sno+ is a large liquid scintillator-based experiment located 2km underground at snolab, sudbury, canada. it reuses the sudbury neutrino observatory detector, consisting of a 12m diameter acrylic vessel which will be filled with about 780 tonnes of ultra-pure liquid scintillator. designed as a multipurpose neutrino expe... | current status and future prospects of the sno+ experiment |
upcoming astronomical surveys such as the large synoptic survey telescope (lsst) will rely on photometric classification to identify the majority of the transients and variables that they discover. we present a set of techniques for photometric classification that can be applied even when the training set of spectrosco... | avocado: photometric classification of astronomical transients with gaussian process augmentation |
using recent supernova models, i revisit the supernova 1987a constraints on scalar/pseudoscalar axion-like-particles (alps). on the basis of the neutrino detections, the luminosity of alps must be $\lesssim 5\times10^{52} \,\mathrm{erg}/s$ after the core-bounce, and this bound limits alps couplings. contrary to the qcd... | revisiting supernova 1987a limits on axion-like-particles |
fink is a broker designed to enable science with large time-domain alert streams such as the one from the upcoming vera c. rubin observatory legacy survey of space and time (lsst). it exhibits traditional astronomy broker features such as automatized ingestion, annotation, selection, and redistribution of promising ale... | fink, a new generation of broker for the lsst community |
monte carlo (mc) algorithms are commonly employed to explore high-dimensional parameter spaces constrained by data. all the statistical information obtained in the output of these analyses is contained in the markov chains, which one needs to process and interpret. the marginalization technique allows us to digest thes... | fast test to assess the impact of marginalization in monte carlo analyses and its application to cosmology |
the tidal disruption of a star by a massive black hole is expected to yield a luminous flare of thermal emission. about two dozen of these stellar tidal disruption flares (tdfs) may have been detected in optical transient surveys. however, explaining the observed properties of these events within the tidal disruption p... | on the mass and luminosity functions of tidal disruption flares: rate suppression due to black hole event horizons |
in this paper, we propose a new phenomenological two parameter parameterization of q(z) to constrain barotropic dark energy models by considering a spatially flat universe, neglecting the radiation component, and reconstructing the effective equation of state (eos). this two free-parameter eos reconstruction shows a no... | constraints on barotropic dark energy models by a new phenomenological q( z) parameterization |
asymmetric mass ejection in the early phase of supernova (sn) explosions can impart a kick velocity to the new-born neutron star (ns). for neutrino-driven explosions the ns acceleration has been shown to be mainly caused by the gravitational attraction of the anisotropically expelled inner ejecta, while hydrodynamic fo... | neutron star kicks by the gravitational tug-boat mechanism in asymmetric supernova explosions: progenitor and explosion dependence |
since core-collapse supernova simulations still struggle to produce robust neutrino-driven explosions in 3d, it has been proposed that asphericities caused by convection in the progenitor might facilitate shock revival by boosting the activity of non-radial hydrodynamic instabilities in the post-shock region. we invest... | non-radial instabilities and progenitor asphericities in core-collapse supernovae |
we investigate the early impact of single and binary supernova (sn) explosions on dense gas clouds with three-dimensional, high-resolution, hydrodynamic simulations. the effect of cloud structure, radiative cooling and ionizing radiation from the progenitor stars on the net input of kinetic energy, fkin = ekin/esn, the... | the energy and momentum input of supernova explosions in structured and ionized molecular clouds |
we have analysed the pantheon+ sample using a new likelihood model that replaces the single type ia supernovae (snia) absolute magnitude parameter m used in the standard likelihood model of brout et. al. with two absolute magnitude parameters (m< and m>) and a transition distance (dcrit) that determines the dista... | on the homogeneity of snia absolute magnitude in the pantheon+ sample |
it has been pointed out that there exists a tension in σ _8-ω_m measurement between cmb and lss observation. in this paper we show that σ _8-ω_m observations can be used to test the dark energy theories. we study two models, (1) hu-sawicki (hs) model of f( r) gravity and (2) chavallier-polarski-linder (cpl) parametriza... | testing dark energy models in the light of σ _8 tension |
we present limits on the parameters of the o λ cdm , w0cdm , and w0wacdm models obtained from the joint analysis of the full-shape, baryon acoustic oscillations (bao), big bang nucleosynthesis (bbn) and supernovae data. our limits are fully independent of the data on the cosmic microwave background (cmb) anisotropies, ... | constraints on the curvature of the universe and dynamical dark energy from the full-shape and bao data |
we present a linear stability analysis of the fast-pairwise neutrino flavor conversion based on a result of our latest axisymmetric core-collapse supernova (ccsn) simulation with full boltzmann neutrino transport. in the ccsn simulation, coherent asymmetric neutrino emissions of electron-type neutrinos (ν e) and their ... | fast-pairwise collective neutrino oscillations associated with asymmetric neutrino emissions in core-collapse supernovae |
we present a suite of the first 3d grmhd collapsar simulations, which extend from the self-consistent jet launching by an accreting kerr black hole (bh) to the breakout from the star. we identify three types of outflows, depending on the angular momentum, l, of the collapsing material and the magnetic field, b, on the ... | black hole to breakout: 3d grmhd simulations of collapsar jets reveal a wide range of transients |
in the current work, we have implemented an extension of the standard gaussian process formalism, namely the multi-task gaussian process with the ability to perform a joint learning of several cosmological data simultaneously. we have utilised the "low-redshift" expansion rate data from supernovae type-ia (sn), baryon ... | an improved model-independent assessment of the late-time cosmic expansion |
the high temperature and electron degeneracy attained during a supernova allow for the formation of a large muon abundance within the core of the resulting protoneutron star. if new pseudoscalar degrees of freedom have large couplings to the muon, they can be produced by this muon abundance and contribute to the coolin... | muons in supernovae: implications for the axion-muon coupling |
every supernova so far observed has been considered to be the terminal explosion of a star. moreover, all supernovae with absorption lines in their spectra show those lines decreasing in velocity over time, as the ejecta expand and thin, revealing slower-moving material that was previously hidden. in addition, every su... | energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star |
we calculate the axion emission rate from reactions involving thermal pions in matter encountered in supernovae and neutron star mergers, identify unique spectral features, and explore their implications for astrophysics and particle physics. we find that it is about 2-5 times larger than nucleon-nucleon bremsstrahlung... | enhanced supernova axion emission and its implications |
a crucial ingredient in population synthesis studies involving massive stars is the determination of whether they explode or implode in the end. while the final fate of a massive star is sensitive to its core structure at the onset of collapse, the existing binary population synthesis studies do not reach core collapse... | towards a realistic explosion landscape for binary population synthesis |
we present the early-time light curves of type ia supernovae (sne ia) observed in the first six sectors of transiting exoplanet survey satellite (tess) data. ten of these sne were discovered by asas-sn, seven by atlas, six by ztf, and one by gaia. for nine of these objects with sufficient dynamic range (>3.0 mag fro... | early-time light curves of type ia supernovae observed with tess |
we present a first study of the progenitor star dependence of the three-dimensional (3d) neutrino mechanism of core-collapse supernovae. we employ full 3d general-relativistic multi-group neutrino radiation-hydrodynamics and simulate the postbounce evolutions of progenitors with zero-age main sequence masses of 12, 15,... | the progenitor dependence of core-collapse supernovae from three-dimensional simulations with progenitor models of 12-40 m ⊙ |
the majority of galactic baryons resides outside of the galactic disk in the diffuse gas known as the circumgalactic medium (cgm). while state-of-the art simulations excel at reproducing galactic disk properties, many of them struggle to drive strong galactic winds or to match the observed ionization structure of the c... | the role of cosmic-ray transport in shaping the simulated circumgalactic medium |
the title theory is formulated. it entails a quantum-coherent variant of the fermi-dirac distribution and casts new light on neutrino oscillations. it might enable the incorporation of neutrino mixing into the modeling of core-collapse supernovae and neutron-star mergers. | thermodynamics of oscillating neutrinos |
the spatial and velocity distributions of nuclear species synthesized in the innermost regions of core-collapse supernovae can yield important clues about explosion asymmetries and the operation of the still disputed explosion mechanism. recent observations of radioactive 44ti with high-energy satellite telescopes (nuc... | production and distribution of 44ti and 56ni in a three-dimensional supernova model resembling cassiopeia a |
the ‘standard’ model of cosmology is founded on the basis that the expansion rate of the universe is accelerating at present — as was inferred originally from the hubble diagram of type ia supernovae. there exists now a much bigger database of supernovae so we can perform rigorous statistical tests to check whether the... | marginal evidence for cosmic acceleration from type ia supernovae |
we present the supernova explosion code (snec), an open-source lagrangian code for the hydrodynamics and equilibrium-diffusion radiation transport in the expanding envelopes of supernovae. given a model of a progenitor star, an explosion energy, and an amount and distribution of radioactive nickel, snec generates the b... | light curves of core-collapse supernovae with substantial mass loss using the new open-source supernova explosion code (snec) |
galactic winds from star-forming galaxies play at key role in the evolution of galaxies and the inter-galactic medium. they transport metals out of galaxies, chemically-enriching the inter-galactic medium and modifying the chemical evolution of galaxies. they affect the surrounding inter-stellar and circum-galactic med... | galactic winds and the role played by massive stars |
gravitational-wave (gw) detections are starting to reveal features in the mass distribution of double compact objects. the lower end of the black hole (bh) mass distribution is especially interesting as few formation channels contribute here and because it is more robust against variations in the cosmic star formation ... | no peaks without valleys: the stable mass transfer channel for gravitational-wave sources in light of the neutron star-black hole mass gap |
context. the majority of massive stars are part of binary systems. in about a quarter of these, the companions are so close that mass transfer occurs while they undergo core hydrogen burning, first on the thermal and then on the nuclear timescale. the nuclear timescale mass transfer leads to observational counterparts:... | detailed models of interacting short-period massive binary stars |
recent studies have shown that the observed colour distributions of type ia sne (snia) are well-described by a combination of distributions from dust and intrinsic colour. here we present a new forward-modeling fitting method (dust2dust) to measure the parent dust and colour distributions, including their dependence on... | the pantheon+ analysis: forward-modeling the dust and intrinsic colour distributions of type ia supernovae, and quantifying their impact on cosmological inferences |
dark matter could be a thermal relic comprised of strongly interacting massive particles (simps), where 3 →2 interactions set the relic abundance. such interactions generically arise in theories of chiral symmetry breaking via the wess-zumino-witten term. in this work, we show that an axionlike particle can successfull... | strongly interacting massive particles through the axion portal |
we propose a new simple formalism to predict the orbital separations after common-envelope phases with massive-star donors. we focus on the fact that massive red supergiants tend to have a sizable radiative layer between the dense helium core and the convective envelope. our formalism treats the common-envelope phase i... | a two-stage formalism for common-envelope phases of massive stars |
we map the trends of elemental abundance ratios across the galactic disk, spanning r=3{--}15 {kpc} and midplane distance | z| =0{--}2 {kpc}, for 15 elements in a sample of 20,485 stars measured by the sdss/apogee survey (o, na, mg, al, si, p, s, k, ca, v, cr, mn, fe, co, ni). adopting mg rather than fe as our reference... | chemical cartography with apogee: multi-element abundance ratios |
massive stars, supernovae, and kilonovae are among the most luminous radiation sources in the universe. observations usually show near- to mid-infrared (nir-mir, λ ≈ 1-5 μm) emission excess from h ii regions around young massive star clusters. early-phase observations in optical-to-nir wavelengths of type ia supernovae... | rotational disruption of dust grains by radiative torques in strong radiation fields |
we report evidence for excess blue light from the type ia supernova (sn ia) sn 2012cg at 15 and 16 days before maximum b-band brightness. the emission is consistent with predictions for the impact of the supernova on a non-degenerate binary companion. this is the first evidence for emission from a companion to a normal... | sn 2012cg: evidence for interaction between a normal type ia supernova and a non-degenerate binary companion |
we calculate the evolution of massive stars, which undergo pulsational pair-instability (ppi) when the o-rich core is formed. the evolution from the main sequence through the onset of ppi is calculated for stars with initial masses of 80-140 m ⊙ and metallicities of z = 10-3-1.0 z ⊙. because of mass loss, z ≤ 0.5 z ⊙ i... | pulsational pair-instability supernovae. i. pre-collapse evolution and pulsational mass ejection |
two sources of geometric information are encoded in the galaxy power spectrum: the sound horizon at recombination and the horizon at matter-radiation equality. analyzing the boss 12th data release galaxy power spectra using perturbation theory with ωm priors from pantheon supernovae but no priors on ωb, we obtain const... | determining the hubble constant without the sound horizon: measurements from galaxy surveys |
in this manuscript we reassess the potential of interacting dark matter-dark energy models in solving the hubble constant tension. these models have been proposed but also questioned as possible solutions to the h0 problem. here we examine several interacting scenarios against cosmological observations, focusing on the... | late-time interacting cosmologies and the hubble constant tension |
exascale computing could soon enable a predictive theory of nuclear structure and reactions rooted in the standard model, with quantifiable and systematically improvable uncertainties. such a predictive theory will help exploit experiments that use nucleons and nuclei as laboratories for testing the standard model and ... | towards grounding nuclear physics in qcd |
in this article we compare a variety of well-known dynamical dark energy models using the cosmic microwave background measurements from the 2018 planck legacy and 2015 planck data releases, the baryon acoustic oscillations measurements and the local measurements of h0 obtained by the sh0es (supernovae, h0, for the equa... | dynamical dark energy after planck cmb final release and h0 tension |
motivated by the exciting features and a recent proposed general form of the function of non-metricity scalar q, we investigate the cosmological implications in f(q) gravity, through the resulting effective dark energy sector, extracting analytical expressions for the dark energy density, equation-of-state and the dece... | late-time cosmology with phantom dark-energy in f(q) gravity |
tin (ii) sulfide (sns) is a layered mineral found in nature. in this paper, we study the two-dimensional (2d) form of this material using a combination of ab initio calculation and k .p theory. in particular, we address the valley properties and the optical selection rules of 2d sns. our study reveals sns as an extraor... | valley physics in tin (ii) sulfide |
superluminous supernovae are a new class of supernovae that were recognized about a decade ago. both observational and theoretical progress has been significant in the last decade. in this review, we first briefly summarize the observational properties of superluminous supernovae. we then introduce the three major sugg... | superluminous supernovae |
we determine limits from sn 1987a on massive axionlike particles with masses in the 10 kev-100 mev range and purely coupled to two photons. axionlike particles produced in the core collapse escape from the star and decay into photons that can be observed as a delayed and diffuse burst. we discuss the time and angular d... | decay photons from the axionlike particles burst of type ii supernovae |
the proposal that core collapse supernovae are neutrino driven is still the subject of active investigation more than 50 years after the seminal paper by colgate and white. the modern version of this paradigm, which we owe to wilson, proposes that the supernova shock wave is powered by neutrino heating, mediated by the... | physical, numerical, and computational challenges of modeling neutrino transport in core-collapse supernovae |
understanding the escape of lyman continuum (lyc) and lyman alpha (lyα) photons from molecular clouds is one of the keys to constraining the reionization history of the universe. using a set of radiation-hydrodynamic simulations, we investigate how photons propagate and escape from turbulent clouds with different masse... | understanding the escape of lyc and lyα photons from turbulent clouds |
dense clouds of neutrinos and antineutrinos can exhibit fast collective flavor oscillations. previously, in [s. bhattacharyya and b. dasgupta, phys. rev. lett. 126, 061302 (2021)., 10.1103/physrevlett.126.061302], we proposed that such flavor oscillations lead to depolarization—i.e., an irreversible mixing of the flavo... | elaborating the ultimate fate of fast collective neutrino flavor oscillations |
the universe may feature large-scale inhomogeneities beyond the standard paradigm, implying that statistical homogeneity and isotropy may be reached only on much larger scales than the usually assumed ~100 mpc. this means that we are not necessarily typical observers and that the copernican principle could be recovered... | a void in the hubble tension? the end of the line for the hubble bubble |
most treatments of neutrino flavor evolution, above a surface of the last scattering, take identical angular distributions on this surface for the different initial (unmixed) flavors, and for particles and antiparticles. differences in these distributions must be present, as a result of the species-dependent scattering... | neutrino cloud instabilities just above the neutrino sphere of a supernova |
the current discrepancy between the hubble constant, h0, derived from the local distance ladder and from the cosmic microwave background is one of the most crucial issues in cosmology, as it may possibly indicate unknown systematics or new physics. here, we present a novel non-parametric method to estimate the hubble c... | evidence of a decreasing trend for the hubble constant |
in this document, the technical details of the jsns$^2$ (j-parc sterile neutrino search at j-parc spallation neutron source) experiment are described. the search for sterile neutrinos is currently one of the hottest topics in neutrino physics. the jsns$^2$ experiment aims to search for the existence of neutrino oscilla... | technical design report (tdr): searching for a sterile neutrino at j-parc mlf (e56, jsns2) |
recent weak lensing surveys have revealed that the direct measurement of the parameter combination $s_8\equiv\sigma_8(\omega_m/0.3)^{0.5}$ -- where $\sigma_8$ is a measure of the amplitude of matter fluctuations on 8 $h^{-1}$mpc scales -- is $\sim3\sigma$ discrepant with the value reconstructed from cosmic microwave ba... | implications of the $s_8$ tension for decaying dark matter with warm decay products |
models of pair-instability supernovae (pisne) predict a gap in black hole (bh) masses between ∼45 m⊙ and 120 m⊙, which is referred to as the upper bh mass-gap. with the advent of gravitational-wave astrophysics, it has become possible to test this prediction, and there is an important associated effort to understand wh... | the impact of stellar rotation on the black hole mass-gap from pair-instability supernovae |
we investigate the thermal emission and extinction from dust associated with the nearby superluminous supernova (slsn) 2018bsz. our dataset has daily cadence and simultaneous optical and near-infrared coverage up to ~ 100 days, together with late time (+ 1.7 yr) mir observations. at 230 days after light curve peak the ... | sn 2018bsz: significant dust formation in a nearby superluminous supernova |
we consider gamma-ray burst (grb) jets that are choked by extended material as sources of high-energy cosmic neutrinos. we take into account the jet propagation physics both inside the progenitor star and the surrounding dense medium. radiation constraints, which are relevant for high-energy neutrino production, are co... | choked jets and low-luminosity gamma-ray bursts as hidden neutrino sources |
we investigate the impact of cosmic rays (crs) on galactic outflows from a multiphase interstellar medium with solar neighbourhood conditions. the three-dimensional magnetohydrodynamical simulations include crs as a relativistic fluid in the advection-diffusion approximation. the thermal and chemical state of the inter... | cooler and smoother - the impact of cosmic rays on the phase structure of galactic outflows |
the prolonged near infrared (nir) emission observed following the long duration grb 211211a is inconsistent with afterglow emission from the shock driven into the circum-stellar medium (csm), and with emission from a possible underlying supernova. it has therefore been suggested that the observed nir flux is the signat... | strong nir emission following the long duration grb 211211a: dust heating as an alternative to a kilonova |
we present improved photometric measurements for the host galaxies of 206 spectroscopically confirmed type ia supernovae discovered by the dark energy survey supernova program (des-sn) and used in the first des-sn cosmological analysis. for the des-sn sample, when considering a 5d (z, x1, c, α, β) bias correction, we f... | first cosmology results using type ia supernovae from the dark energy survey: the effect of host galaxy properties on supernova luminosity |
we present observations of sn 2015bn (=ps15ae = css141223-113342+004332 = mls150211-113342+004333), a type i superluminous supernova (slsn) at redshift z = 0.1136. as well as being one of the closest slsne i yet discovered, it is intrinsically brighter ({m}u≈ -23.1) and in a fainter galaxy ({m}b≈ -16.0) than other slsn... | sn 2015bn: a detailed multi-wavelength view of a nearby superluminous supernova |
ridged, orthorhombic two-dimensional atomic crystals with a bulk {\em pnma} structure such as black phosphorus and monochalcogenide monolayers are an exciting and novel material platform for a host of applications. key to their crystallinity, monolayers of these materials have a four-fold degenerate structural ground s... | two-dimensional disorder in black phosphorus and monochalcogenide monolayers |
there is growing observational evidence for dwarf galaxies hosting active galactic nuclei (agn), including hints of agn-driven outflows in dwarfs. however, in the common theoretical model of galaxy formation, efficient supernova (sn) feedback is the tool of choice for regulating star formation in the low-mass regime. i... | two can play at that game: constraining the role of supernova and agn feedback in dwarf galaxies with cosmological zoom-in simulations |
we present details on the observing strategy, data-processing techniques, and spectroscopic targeting algorithms for the first three years of operation for the dark energy survey supernova program (des-sn). this five-year program using the dark energy camera mounted on the 4 m blanco telescope in chile was designed to ... | first cosmology results using supernovae ia from the dark energy survey: survey overview, performance, and supernova spectroscopy |
the role of cosmic rays generated by supernovae and young stars has very recently begun to receive significant attention in studies of galaxy formation and evolution due to the realization that cosmic rays can efficiently accelerate galactic winds. microscopic cosmic-ray transport processes are fundamental for determin... | impact of cosmic-ray transport on galactic winds |
fast flavor conversions of supernova neutrinos, possible near the neutrinosphere, depends on an interesting interplay of collisions and neutrino oscillations. contrary to naïve expectations, the rate of self-induced neutrino oscillations, due to neutrino-neutrino forward scattering, comfortably exceeds the rate of coll... | collisional triggering of fast flavor conversions of supernova neutrinos |
we present an exquisite 30 minute cadence kepler (k2) light curve of the type ia supernova (sn ia) 2018oh (asassn-18bt), starting weeks before explosion, covering the moment of explosion and the subsequent rise, and continuing past peak brightness. these data are supplemented by multi-color panoramic survey telescope (... | k2 observations of sn 2018oh reveal a two-component rising light curve for a type ia supernova |
we present the results of a multiwavelength campaign targeting frb 20201124a, the third closest repeating fast radio burst (frb), which was recently localized in a nearby (z = 0.0978) galaxy. deep vla observations led to the detection of quiescent radio emission, which was also marginally visible in x-rays with chandra... | the fast radio burst frb 20201124a in a star-forming region: constraints to the progenitor and multiwavelength counterparts |
automated classification of supernovae (sne) based on optical photometric light-curve information is essential in the upcoming era of wide-field time domain surveys, such as the legacy survey of space and time (lsst) conducted by the rubin observatory. photometric classification can enable real-time identification of i... | superraenn: a semisupervised supernova photometric classification pipeline trained on pan-starrs1 medium-deep survey supernovae |
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