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detecting and studying galactic gamma-ray sources emitting very-high energy photons sheds light on the acceleration and propagation of cosmic rays presumably created in these sources. currently, there are few sources emitting photons with energies exceeding 100 tev. in this work we revisit the unidentified source mgro ... | revisiting the pevatron candidate mgro j1908+06 with an updated h.e.s.s. analysis |
supernovae chemically enrich their environments, drive future generations of star formation, and can accelerate particles up to the knee of the cosmic-ray spectrum. supernovae are inherently asymmetric processes, and the degree of asymmetry is determined by the explosion and the internal structure of the progenitor sta... | dissecting the energetics of supernovae at high spectral resolution: lem studies of supernovae and supernova remnants |
x-ray binaries are long-standing source candidates of galactic cosmic rays and neutrinos. the compact object in a binary system can be the site for cosmic-ray acceleration, while high-energy neutrinos can be produced by the interactions of cosmic rays in the jet of the compact object, the stellar wind, or the atmospher... | searching for time-dependent high-energy neutrino emission from x-ray binaries with icecube |
ixpe has begun its first year of observations that will measure the linear polarization of energetic cosmic phenomena. this talk will discuss prospects for ixpe observations of selected radio-loud active galactic nuclei with sufficiently strong x-ray emission. during year 1, cen a and a number of quasars and bl lac obj... | observations of blazars and radio galaxies with ixpe |
we summarise observations and our current understanding of the interstellar medium (ism) in galaxies, which mainly consists of three phases: cold atomic or molecular gas and clouds, warm neutral or ionised gas, and hot ionised gas. these three gas phases form thermally stable states, while disturbances are caused by gr... | diffuse hot plasma in the interstellar medium and galactic outflows |
ixpe has completed its first year of measurements of the linear polarization of energetic cosmic phenomena. this talk will discuss ixpe observations of selected radio-loud active galactic nuclei (agn) with high x-ray fluxes and strong and variable optical polarization (blazars). during the first year of operation ixpe ... | observations and modeling of blazars with the imaging x-ray polarimetry explorer (ixpe) |
astrophysical collisionless shocks play a central role in magnetic field amplification, plasma heating, and acceleration of galactic cosmic rays. a fundamental open question is what are the mechanisms that control the energy partition between ions and electrons downstream of the shock. observations of high mach number ... | electron and ion thermalization in collisionless shocks |
recent studies show the importance of feedback in the evolution of the star formation rate in the universe. however, the nature and physics of the feedback are still pressing questions. radio continuum observations can provide unique dust-unbiased tracers of massive star formation and of the interstellar medium (ism) a... | unveiling the physics of star formation and feedback in galaxies |
there are approximately (2-4)·1011 stars in the galaxy. many of these stars produce stellar flares, that is, they are active stars. it is known that our sun accelerates charged particles during powerful solar flares. if solar and stellar flares are compared, one can find many common features in these phenomena, and it ... | why are new sources of cosmic rays nearby the solar system needed? |
one of the major scientific objectives of the future cherenkov telescope array (cta) observatory is the search for galactic pevatrons. galactic pevatrons are cosmic-ray factories able to accelerate nuclei at least up to 1 pev energies and beyond up to the knee feature seen at around 3 pev in the spectrum of cosmic rays... | searching for pevatrons with cta |
the non-resonant (bell) streaming instability driven by energetic particles is crucial for producing amplified magnetic fields that are key to the acceleration of cosmic rays (crs) in supernova remnants, around galactic and extra-galactic cr sources, and for the cr transport. we present a covariant theory for the satur... | the saturation of the bell instability and its implications for cosmic ray acceleration and transport |
recent measurements of primary and secondary cr spectra, their arrival directions, and our improved knowledge of the magnetic field geometry around the heliosphere allow us to set a bound on the distance beyond which a puzzling 10-tev "bump" cannot originate. the sharpness of the spectral breaks associated with the bum... | on why the 10-tev cosmic ray bump originates in the local interstellar medium |
non-thermal emission from relativistic electrons gives insight into the strength and morphology of intra-cluster magnetic fields, as well as providing powerful tracers of structure formation shocks. emission caused by cosmic ray (cr) protons on the other hand still challenges current observations and is therefore testi... | galaxy cluster simulations with a spectral cosmic ray model -- "wrong way" radio relics |
starburst galaxies undergo intense episodes of star formation. in these galaxies, gas is ejected into the surroundings in the form of strong winds, produced by the combined effect of numerous supernova explosions. when these winds interact with the intergalactic medium, they give rise to strong shocks that are capable ... | preliminary results of a search for radio halos in starburst galaxies |
in this paper, we review recent and ongoing work by our group on numerical simulations of relativistic jets. relativistic outflows in astrophysics are related to dilute, high energy plasmas, with physical conditions out of the reach of current laboratory capabilities. simulations are thus imperative for the study of th... | numerical simulations of relativistic jets |
although fanaroff-riley type 0 (fr 0) radio galaxies are known to be the most numerous jet population in the local universe, they are much less explored than the well-established class of fr type i (fr i) and fr type ii galaxies due to their intrinsic weakness. observationally, their nuclear radio, optical, and x-ray p... | on the subparsec-scale core composition of fr 0 radio galaxies |
aims: in this work, we analysed new low frequency array observations of the mini halo in the cluster rbs 797, together with archival very large array observations and the recent chandra results. this cluster is known to host a powerful active galactic nucleus (agn) at its centre, with two pairs of jets propagating in o... | shock imprints on the radio mini halo in rbs 797 |
observational evidence for the accelerated expansion of the universe requires dark energy for its explanation if general relativity is an accurate model of gravity. however, dark energy is a mysterious quantity and we do not know much about its nature so understanding dark energy is an exciting scientific challenge. co... | using quasar and gamma-ray burst measurements to constrain cosmological dark energy models |
odd radio circles (orcs) are mysterious rings of faint, diffuse emission recently discovered in radio surveys. some are potentially associated with galaxies, and proposed to be synchrotron emission from remnants of galactic outflows, which we call ogres. assuming that orcs arise from ogres, we discuss the broadband non... | broadband non-thermal emission of odd radio circles induced by galactic outflow remnants and their evolution |
magnetic fields are involved in every astrophysical process on every scale:from planetary and stellar interiors to neutron stars, stellar wind bubbles and supernova remnants; from the interstellar medium in galactic disks, nuclei, spiral arms and halos to the intracluster and intergalactic media.they are involved in es... | cosmic magnetism |
westerlund 1 (wd 1) is a massive stellar cluster located within the galaxy at a distance of ~5 kpc from the earth. the cluster is thought to be a site of significant galactic cosmic ray acceleration. further insight into this possibility can be gained through the study of gamma-ray emission from the cluster. the high e... | exploring evidence for cosmic ray acceleration in westerlund 1 |
i will review recent developments on the subject of acceleration and transport of galactic cosmic rays. recent observations, and the data collected by pamela and ams02 in particular, have revealed a number of unexpected features in the spectra of both primary and secondary cosmic rays. these findings seem to challenge ... | on the acceleration and transport of galactic cosmic rays |
this project focuses on the physics of the circumgalactic medium (cgm) and its role in galaxy evolution. the proposed work is motivated by evidence that the cgm holds the key to answering several of the outstanding central questions in galaxy formation, as well as by recent advances in galaxy formation simulations. the... | the physics of the cgm and its role in galaxy evolution |
the icecube collaboration (http://icecube.wisc.edu/) reports: icecube has performed a search for track-like muon neutrino events arriving from the direction of the type ii supernova sn 2023ixf in a time window of +/- 2 days from the ztf detection time (2023-05-17 07:45:07.200 to 2023-05-21 07:45:07.200) during which ic... | sn 2023ixf: upper limits from a neutrino search with icecube |
in the dense supernova environment, neutrinos can undergo fast flavor conversions which depend on the large neutrino-neutrino interaction strength. it has been recently shown that both their presence and outcome can be affected when passing from the commonly used three neutrino species approach to the more general one ... | supernova fast flavor conversions in 1 +1 d : influence of mu-tau neutrinos |
two-moment neutrino transport methods have been widely used for developing theoretical models of core-collapse supernovae (ccsn), since they substantially reduce the computational burden inherent in the multidimensional neutrino-radiation hydrodynamical simulations. the approximation, however, comes at a price; the det... | constructing angular distributions of neutrinos in core-collapse supernovae from zeroth and first moments calibrated by full boltzmann neutrino transport |
light hypothetical particles with masses up to $\mathcal{o}(100)\ {\rm mev}$ can be produced in the core of supernovae. their subsequent decays to neutrinos can produce a flux component with higher energies than the standard flux. we study the impact of heavy neutral leptons, $z'$ bosons, in particular ${\rm u(1)}_{l_\... | limits on heavy neutral leptons, $z'$ bosons and majorons from high-energy supernova neutrinos |
the gravitational waves (gw) from core-collapse supernovae (ccsn) have been proposed as a probe to investigate physical properties inside of the supernova. however, how to search and extract the gw signals from core-collapse supernovae remains an open question due to its complicated time-frequency structure. in this pa... | waveform reconstruction of core-collapse supernovae gravitational-waves with ensemble empirical mode decomposition |
the cores of dense stars are a powerful laboratory for studying feebly-coupled particles such as axions. some of the strongest constraints on axionlike particles and their couplings to ordinary matter derive from considerations of stellar axion emission. in this work we study the radiation of axionlike particles from d... | neutron star cooling with lepton-flavor-violating axions |
we analyze the impact of resonant conversions mediated by non-vanishing magnetic moments between active neutrinos and a heavy sterile neutrino on the supernova neutrino flux. we present the level-crossing scheme for such a scenario and derive the neutrino fluxes after conversion, paying special attention to the order i... | resonant spin-flavor precession of sterile neutrinos |
supernovae provide fascinating opportunities to study various particles and their interactions. among these there are neutrinos, axions, and other light weakly interacting particles, which play a significant role in our understanding of fundamental physics. in this study, the focus lies on the recent advancements made ... | axion emission from supernovae: a cheatsheet |
time of flight delay in the supernova neutrino signal offers a unique tool to set model-independent constraints on the absolute neutrino mass. the presence of a sharp time structure during a first emission phase, the so-called neutronization burst in the electron neutrino flavor time distribution, makes this channel a ... | absolute ν mass measurement with the dune experiment |
in this article, we study the on-shell production of low-mass vector mediators from neutrino-antineutrino coalescence in the core of protoneutron stars. taking into account the radial dependence of the density, energy, and temperature inside the protoneutron star, we compute the neutrino-antineutrino interaction rate i... | constraints from the duration of supernova neutrino burst on on-shell light gauge boson production by neutrinos |
we explore the energy and entropy transport as well as the lepton number variation induced from the mixing between electron and sterile neutrinos with kev mass in the supernova core. we develop a radial- and time-dependent treatment of the νs-νe mixing, by including ordinary matter effects, reconversions between steril... | lifting the core-collapse supernova bounds on kev-mass sterile neutrinos |
cosmology in the near future promises a measurement of the sum of neutrino masses ∑ mν, a fundamental standard model parameter, as well as substantially-improved constraints on the dark energy. we use the shape of the boss redshift-space galaxy power spectrum, in combination with cmb and supernova data, to constrain th... | neutrino mass and dark energy constraints from redshift-space distortions |
heavy sterile neutrinos with masses script o(100) mev mixing with active neutrinos can be produced in the core of a collapsing supernova (sn). in order to avoid an excessive energy loss, shortening the observed duration of the sn 1987a neutrino burst, we show that the active-sterile neutrino mixing angle should satisfy... | heavy sterile neutrino emission in core-collapse supernovae: constraints and signatures |
context. modeling core-collapse supernovae (sne) with neutrino transport in three dimensions (3d) requires tremendous computing resources and some level of approximation. we present a first comparison study of core-collapse sne in 3d with different physics approximations and hydrodynamics codes.aims: the objective of t... | core-collapse supernovae in the hall of mirrors. a three-dimensional code-comparison project |
future large liquid-scintillator detectors can be implemented to observe neutrinos from a core-collapse supernova in our galaxy in various reaction channels: (1) the inverse beta decay ν¯ e+p →n +e+ , (2) the elastic neutrino-proton scattering ν +p →ν +p , (3) the elastic neutrino-electron scattering ν +e-→ν +e- , (4) ... | getting the most from the detection of galactic supernova neutrinos in future large liquid-scintillator detectors |
in the late stages of nuclear burning for massive stars (m > 8 m⊙), the production of neutrino-antineutrino pairs through various processes becomes the dominant stellar cooling mechanism. as the star evolves, the energy of these neutrinos increases and in the days preceding the supernova a significant fraction of em... | kamland sensitivity to neutrinos from pre-supernova stars |
the mixing of active neutrinos with their sterile counterparts with kev mass is known to have a potentially major impact on the energy loss from the supernova core. by relying on a set of three static hydrodynamical backgrounds mimicking the early accretion phase and the kelvin-helmoltz cooling phase of a supernova, we... | tau lepton asymmetry by sterile neutrino emission—moving beyond one-zone supernova models |
a large-scale neutrino observatory based on water-based liquid scintillator (wbls) will be excellently suited for a measurement of the diffuse supernova neutrino background (dsnb). the wbls technique offers high signal efficiency and effective suppression of the otherwise overwhelming background from neutral-current in... | detecting the diffuse supernova neutrino background in the future water-based liquid scintillator detector theia |
in modern analysis pipelines, einstein-boltzmann solvers (ebss) are an invaluable tool for obtaining cmb and matter power spectra. to significantly accelerate the computation of these observables, the cosmicnet strategy is to replace the usual bottleneck of an ebs, which is the integration of a system of differential e... | cosmicnet ii: emulating extended cosmologies with efficient and accurate neural networks |
feebly interacting particles with masses with o (10 - 100 ) mev can be copiously produced by core-collapse supernovae (sne). in this paper we consider the case of mev-ish sterile neutrinos and dark photons mixed with ordinary neutrinos and photons, respectively. furthermore, both sterile neutrinos and dark photons may ... | 511 kev line constraints on feebly interacting particles from supernovae |
we present a new method for neutrino-matter coupling in multi-dimensional radiation-hydrodynamic simulations of core-collapse supernovae (ccsne) with the full boltzmann neutrino transport. this development is motivated by the fact that accurate conservation of momentum is required for reliable numerical modelings of cc... | three-dimensional boltzmann-hydro code for core-collapse in massive stars. iii. a new method for momentum feedback from neutrino to matter |
context. core-collapse supernovae (ccsne) are expected to emit gravitational wave signals that could be detected by current and future generation interferometers within the milky way and nearby galaxies. the stochastic nature of the signal arising from ccsne requires alternative detection methods to matched filtering.a... | lstm and cnn application for core-collapse supernova search in gravitational wave real data |
in this paper, we revisit the sn1987a neutrino data to see its constraints on flavor conversion. we are motivated by the fact that most works that analyze this data consider a specific conversion mechanism, such as the msw (mikheyev-smirnov-wolfenstein) effect, although flavor conversion is still an open question in su... | sn1987a neutrino burst: limits on flavor conversion |
we suggest the future detection of neutrinos from a galactic core-collapse supernova can be used to infer the progenitor’s inner mass density structure. we present the results from 20 axisymmetric core-collapse supernova simulations performed with progenitors spanning initial masses in the range 11-30 {m}⊙ , and focus ... | estimating the core compactness of massive stars with galactic supernova neutrinos |
the advent of gadolinium-loaded super-kamiokande (sk-gd) and of the soon-to-start juno liquid scintillator detector marks a substantial improvement in global sensitivity for the diffuse supernova neutrino background (dsnb). the present article reviews the detector properties most relevant for the dsnb searches in both ... | prospects for the detection of the diffuse supernova neutrino background with the experiments sk-gd and juno |
in the absence of high-statistics supernova neutrino measurements, estimates of the diffuse supernova neutrino background (dsnb) hinge on the precision of simulations of core-collapse supernovae. understanding the cooling phase of protoneutron star (pns) evolution (≳1 s after core bounce) is crucial, since approximatel... | impact of late-time neutrino emission on the diffuse supernova neutrino background |
background: nuclear pasta, emerging due to the competition between the long-range coulomb force and the short-range strong force, is believed to be present in astrophysical scenarios, such as neutron stars and core-collapse supernovae. its structure can have a high impact, e.g., on neutrino transport or the tidal defor... | survey of nuclear pasta in the intermediate-density regime: shapes and energies |
neutrinos from a galactic core-collapse supernova will be measured by neutrino detectors minutes to days before an optical signal reaches earth. we present a novel calculation showing the ability of current and near-future neutrino detectors to make fast predictions of the progenitor distance and place constraints on t... | measuring the distance and mass of galactic core-collapse supernovae using neutrinos |
neutron tagging in gadolinium-doped water may play a significant role in reducing backgrounds from atmospheric neutrinos in next generation proton-decay searches using megaton-scale water cherenkov detectors. similar techniques might also be useful in the detection of supernova neutrinos. accurate determination of neut... | letter of intent: the accelerator neutrino neutron interaction experiment (annie) |
we investigate the precision with which the supernova neutrino spectra can be reconstructed in water cherenkov detectors, in particular the large scale hyper-kamiokande and super-kamiokande. to this aim, we consider quasi-thermal neutrino spectra modified by the mikheev-smirnov-wolfenstein effect for the case of normal... | what can we learn on supernova neutrino spectra with water cherenkov detectors? |
we study the multi-dimensional properties of neutrino transfer inside supernova cores by solving the boltzmann equations for neutrino distribution functions in genuinely six-dimensional phase space. adopting representative snapshots of the post-bounce core from other supernova simulations in three dimensions, we solve ... | multi-dimensional features of neutrino transfer in core-collapse supernovae |
based on the recently formulated chiral radiation transport theory for left-handed neutrinos, we study the chiral transport of neutrinos near thermal equilibrium in core-collapse supernovae. we first compute the near-equilibrium solution of the chiral radiation transport equation under the relaxation time approximation... | magnetic field induced neutrino chiral transport near equilibrium |
in this review article, we discuss selected developments regarding the role of the equation of state in simulations of core-collapse supernovae. there are no first-principle calculations of the state of matter under supernova conditions since a wide range of conditions is covered, in terms of density, temperature, and ... | the state of matter in simulations of core-collapse supernovae—reflections and recent developments |
paleodetectors are a proposed experimental technique in which one would search for traces of recoiling nuclei in ancient minerals. natural minerals on earth are as old as o (1 ) gyr and, in many minerals, the damage tracks left by recoiling nuclei are also preserved for timescales long compared to 1 gyr once created. t... | paleodetectors for galactic supernova neutrinos |
the detection of neutrinos from core-collapse supernovae may reveal important process features as well as neutrino properties. the detection of supernova neutrinos is one of the main science drivers for future kiloton-scale neutrino detectors based on liquid argon. here we show that for such detectors the intrinsically... | enhanced low-energy supernova burst detection in large liquid argon time projection chambers enabled by q-pix |
the experimental searches for diffuse supernova neutrino background and proton decay in next-generation large liquid-scintillator (ls) detectors are competitive with and complementary to those in the water-cherenkov detectors. in this paper, we carry out a systematic study of the dominant background induced by atmosphe... | neutral-current background induced by atmospheric neutrinos at large liquid-scintillator detectors. i. model predictions |
in this work, for the first time in literature, we compare the predictions of non-minimally coupled natural and coleman-weinberg potentials in the $n_s-r$ plane against the constraints from the latest cosmological data in an extended $\lambda$cdm model where we include non-standard self-interactions among massive neutr... | first constraints on non-minimally coupled natural and coleman-weinberg inflation in the light of massive neutrino self-interactions and planck+bicep/keck |
neutrino propagation through a turbulent medium can be highly non-adiabatic leading to distinct signatures in the survival probabilities. a core-collapse supernova can be host to a number of hydrodynamic instabilities which occur behind the shockfront. such instabilities between the forward shock and a possible reverse... | on probing turbulence in core-collapse supernovae in upcoming neutrino detectors |
in view of the great interest in liquid argon neutrino detectors, the 40ar(γ ,γ')40ar reaction was revisited to guide a calculation of the neutral current neutrino cross section at supernova energies. using the nuclear resonance fluorescence technique with a monoenergetic, 99% linearly polarized photon beam, we report ... | neutral-current neutrino cross section and expected supernova signals for 40ar from a three-fold increase in the magnetic dipole strength |
we develop an approach to chiral kinetic theories for electrons close to equilibrium and neutrinos away from equilibrium based on a systematic power counting scheme for different timescales of electromagnetic and weak interactions. under this framework, we derive electric and energy currents along magnetic fields induc... | effective chiral magnetic effect from neutrino radiation |
measuring precise all-flavor neutrino information from a supernova is crucial for understanding the core-collapse process as well as neutrino properties. we apply a chi-squared analysis for different detector setups to explore determination of νe spectral parameters. using a long-term two-dimensional core-collapse simu... | robust measurement of supernova νe spectra with future neutrino detectors |
we investigate correlated gravitational wave and neutrino signals from rotating core-collapse supernovae with simulations. using an improved mode identification procedure based on mode function matching, we show that a linear quadrupolar mode of the core produces a dual imprint on gravitational waves and neutrinos in t... | multimessenger asteroseismology of core-collapse supernovae |
we investigate the influences of the nuclear composition on the weak interaction rates of heavy nuclei during the core collapse of massive stars. the nuclear abundances in nuclear statistical equilibrium (nse) are calculated by some equation of state (eos) models including in-medium effects on nuclear masses. we system... | dependence of weak interaction rates on the nuclear composition during stellar core collapse |
the zwicky transient facility (ztf) performs a systematic neutrino follow-up programme, searching for optical counterparts to high-energy neutrinos with dedicated target-of-opportunity (too) observations. since first light in march 2018, ztf has taken prompt observations for 24 high-quality neutrino alerts from the ice... | neutrino follow-up with the zwicky transient facility: results from the first 24 campaigns |
the detection of the high-energy (∼290 tev) neutrino coincident with the flaring blazar txs 0506+056, the first and only 3σ neutrino-source association to date, provides new, multimessenger tests of the weak equivalence principle (wep) and lorentz invariance. assuming that the flight time difference between the tev neu... | multimessenger tests of einstein's weak equivalence principle and lorentz invariance with a high-energy neutrino from a flaring blazar |
building on the framework of zhang & shu [1,2], we develop a realizability-preserving method to simulate the transport of particles (fermions) through a background material using a two-moment model that evolves the angular moments of a phase space distribution function f. the two-moment model is closed using algebr... | realizability-preserving dg-imex method for the two-moment model of fermion transport |
supernova neutrino boosted dark matter (sn ν bdm) and its afterglow effect have been shown to be a promising signature for beyond standard model (bsm) physics. the time-evolution feature of sn ν bdm allows for possibly direct inference of dm mass mχ, and results in significant background suppression with improving sens... | signatures of afterglows from light dark matter boosted by supernova neutrinos in current and future large underground detectors |
we study the influence of density-dependent symmetry energy at high densities in simulations of core-collapse supernovae, black hole formation, and proto-neutron star cooling by extending the relativistic mean field (rmf) theory used for the shen equation-of-state (eos) table. we adopt the extended rmf theory to examin... | influence of density dependence of symmetry energy in hot and dense matter for supernova simulations |
the hubble tension, known as a discrepancy between the local measurements vs. the cmb, sne and galaxy clustering fits of the hubble constant, the first measurement of the 21-centimeter high-redshift signal by edges, the high-redshift galaxy halo number densities and the measurements of the ionizing photon mean free pat... | einstein-cartan cosmology and the high-redshift universe |
we calculate the neutrino luminosity in an astrophysical scenario where dark matter is captured by a neutron star which eventually implodes to form a low mass black hole. the trojan horse scenario involves the collapse of a neutron star (ns) due to the accumulation of a critical amount of dark matter (dm) during its li... | neutrino signals from neutron star implosions to black holes |
the present article investigates the role of heavy nuclear clusters and weakly bound light nuclear clusters based on a newly developed equation of state for core collapse supernova studies. a novel approach is brought forward for the description of nuclear clusters, taking into account the quasiparticle approach and co... | medium modifications for light and heavy nuclear clusters in simulations of core collapse supernovae: impact on equation of state and weak interactions |
the impact of electron-capture (ec) cross sections for neutron-rich nuclei on the dynamics of core collapse during infall and early post-bounce is studied by performing spherically symmetric simulations in general relativity using a multigroup scheme for neutrino transport and full nuclear distributions in extended nuc... | impact of electron capture rates for nuclei far from stability on core-collapse supernovae |
we construct isoentropic equations of state (eoss) of β -stable dense hadronic matter considering the possibility that a quark deconfinement phase transition can take place. these conditions can be actually realized in different astrophysical contexts like core-collapse supernovae (ccsne), during the early stages of th... | isoentropic equations of state of β -stable hadronic matter with a quark phase transition |
super-kamiokande, a 50 ktons water cherenkov imaging detector situated 1000 meters underground in the kamioka mine, gifu, japan, has searched for neutrino signal correlated with sn2023ixf in a time window 2 days before the detection by oak st. observatory (2023-05-17 08:45:13 to 2023-05-19 08:45:13), during which super... | neutrino search for sn2023ixf in super-kamiokande |
we present an approximate treatment of the mixing between ντ (ν¯τ) and a sterile species νs (ν¯s) with a vacuum mass-squared difference of ∼102- 103 kev2 in protoneutron stars created in core-collapse supernovae. including production of sterile neutrinos through both resonant flavor conversion and collisions, we track ... | evolution of tau-neutrino lepton number in protoneutron stars due to active-sterile neutrino mixing |
we present neutrino capture cross sections on 13c at supernova neutrino energies, up to 50 mev. for both charged-current and neutral-current reactions partial cross sections are calculated using the statistical hauser-feschbach method. coherent elastic neutrino scattering cross section for a 13c target is also provided... | neutrino-13c cross sections at supernova neutrino energies |
the experimental detection of the ce$$\nu$$ ν ns allows the investigation of neutrinos and neutrino sources with all-flavor sensitivity. given its large content in neutrons and stability, pb is a very appealing choice as target element. the presence of the radioisotope $$^{210}$$ 210 pb (t$$_{1/2}\sim$$ 1 / 2 ∼ 22 yrs)... | operation of an archaeological lead pbwo4 crystal to search for neutrinos from astrophysical sources with a transition edge sensor |
future large liquid-scintillator (ls) detectors are competitive with and complementary to the water-cherenkov detectors on the searches for diffuse supernova neutrino background and nucleon decay. in a companion paper, we have performed a systematic calculation of the neutral-current (nc) background induced by atmosphe... | neutral-current background induced by atmospheric neutrinos at large liquid-scintillator detectors. ii. methodology for in situ measurements |
spin of a test particle is a fundamental property that can affect its motion in a gravitational field. in this work we consider the effect of particle spin on its deflection angle and gravitational lensing in the equatorial plane of arbitrary stationary and axisymmetric spacetimes. to do this we developed a perturbativ... | effect of particle spin on trajectory deflection and gravitational lensing |
a protoneutron star (pns) is a newly formed compact object in a core collapse supernova. in this paper, the neutrino emission from the cooling process of a pns is investigated using two types of nuclear equation of state (eos). it is found that the neutrino signal is mainly determined by the high-density eos. the neutr... | heavy nuclei as thermal insulation for protoneutron stars |
the study of neutron rich matter, present in neutron star, proto-neutron stars and core-collapse supernovae, can lead to further understanding of the behavior of nuclear matter in highly asymmetric nuclei. heterogeneous structures are expected to exist in these systems, often referred to as nuclear pasta. we have carri... | the neutrino opacity of neutron rich matter |
we exhibit a new instability that leads to "fast" coherent neutrino-antineutrino mixing in a dense neutrino cloud, arising from the standard four-fermi interaction induced by z exchange, and overlooked in the big existing literature on fast processes in this venue. it can play an essential role in creation of an abunda... | neutrino-anti-neutrino instability in dense neutrino systems, with applications to the early universe and to supernovae |
the abundance of large clusters of nucleons in neutron-rich matter at subnuclear density is found to be greatly reduced by finite-temperature effects when matter is close to β equilibrium, compared to the case where the electron fraction is fixed at ye>0.1 , as often considered in the literature. large nuclei and ex... | nuclear pasta in hot dense matter and its implications for neutrino scattering |
we calibrate a neutrino transport approximation, called advanced spectral leakage (asl), with the purpose of modelling neutrino-driven winds in neutron star mergers. based on a number of snapshots, we gauge the asl parameters by comparing against both the two-moment (m1) scheme implemented in the flash code and the mon... | calibration of the advanced spectral leakage scheme for neutron star merger simulations, and extension to smoothed-particle hydrodynamics |
there is an accepted approach to calculation of the neutrino flavor density-matrix in the halo of a supernova, in which neutrino amplitudes, not cross-sections, need to be followed carefully in the region above the region of frequent scatterings. the same reasoning and techniques, applied to the evolution of neutrino f... | neutrino collective effects during their decoupling era in the early universe |
during a failed core-collapse supernova, the protoneutron star eventually collapses under its own gravitational field and forms a black hole. this collapse happens quickly, on the dynamical time of the protoneutron star, ≲0.5 ms. during this collapse, barring any excessive rotation, the entire protoneutron star is accr... | neutrino echos following black hole formation in core-collapse supernovae |
super-kamiokande has been searching for neutrino bursts characteristic of core-collapse supernovae continuously, in real time, since the start of operations in 1996. the present work focuses on detecting more distant supernovae whose event rate may be too small to trigger in real time, but may be identified using an of... | searching for supernova bursts in super-kamiokande iv |
we show that the backreaction of left-handed neutrinos out of equilibrium on the matter sector induces an electric current proportional to a magnetic field even without a chiral imbalance for electrons in core-collapse supernovae. we derive the transport coefficient of this effect based on the recently formulated chira... | chiral plasma instability and inverse cascade from nonequilibrium left-handed neutrinos in core-collapse supernovae |
we study the neutrino pair annihilation into electron-positron pairs ( $\nu +\bar{\nu }\to {e}^{-}+{e}^{+}$ ) near the surface of a neutron star. the analysis is performed in the framework of extended theories of gravity. the latter induce a modification of the minimum photon sphere radius (rph) and the maximum energy ... | effects of modified theories of gravity on neutrino pair annihilation energy deposition near neutron stars |
we develop a neutrino transfer code for core-collapse simulations that directly solves the multidimensional boltzmann equations in full general relativity. we employ the discrete ordinate method, which discretizes the 6d phase space. the code is an extension of our special relativistic code coupled to a newtonian hydro... | multidimensional boltzmann neutrino transport code in full general relativity for core-collapse simulations |
core-collapse supernovae (ccsne) emit powerful gravitational waves (gws). since gws emitted by a source contain information about the source, observing gws from ccsne may allow us to learn more about ccsns. we study if it is possible to infer the iron core mass from the bounce and early ring-down gw signal. we generate... | exploring supernova gravitational waves with machine learning |
the influence of thermal effects on neutrino-nucleus reactions occurring under supernova conditions is studied. the approach used is based on the quasiparticle random phase approximation extended to finite temperatures using the superoperator formalism. using the example of the 56fe and 82ge nuclei, a detailed analysis... | superoperator approach to the theory of hot nuclei and astrophysical applications. iii: neutrino-nucleus reactions in stars |
a new neutrino magnetohydrodynamics (nmhd) model is formulated, where the effects of the charged weak current on the electron-ion magnetohydrodynamic fluid are taken into account. the model incorporates in a systematic way the role of the fermi neutrino weak force in magnetized plasmas. a fast neutrino-driven short wav... | neutrino magnetohydrodynamics |
we investigate a scalar field dark energy model (i.e., ϕcdm model) with massive neutrinos, where the scalar field possesses an inverse power-law potential, i.e., v (ϕ) ∝ϕ-α (α > 0). we find that the sum of neutrino masses σmν has significant impacts on the cmb temperature power spectrum and on the matter power spect... | galaxy clustering, cmb and supernova data constraints on ϕcdm model with massive neutrinos |
preface; acknowledgements; acronyms and definitions; introduction; part i. theoretical foundations: 1. basic concepts; 2. kinetic equation; 3. averaging; 4. conservation laws and equilibrium; 5. relativistic bbgky hierarchy; 6. basic parameters in gases and plasmas; part ii. numerical methods: 7. the basics of computat... | relativistic kinetic theory |
the ev-scale sterile neutrino has been proposed to explain some anomalous results in experiments, such as the deficit of reactor neutrino fluxes and the excess of bar nuμ→bar nue in lsnd. this hypothesis can be tested by future core-collapse supernova neutrino detection independently since the active-sterile mixing sch... | constraining sterile neutrinos by core-collapse supernovae with multiple detectors |
we revisit the rates of neutrino pair emission and absorption from nucleon-nucleon bremsstrahlung in supernova matter using the t-matrix formalism in the long-wavelength limit. based on two-body potentials of chiral effective field theory (χeft), we solve the lippmann-schwinger equation for the t-matrix including non-d... | chiral effective field theory description of neutrino nucleon-nucleon bremsstrahlung in supernova matter |
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