T. Foglizzo

Multi-Detector Analyses for CCSN Neutrino Detection

M. Bendahman, Isabel Astrid Goos, J. A. B. Coelho, Matteo Bugli et autres

Abstract Core-collapse supernovae (CCSNe) represent significant astronomical occurrences that offer essential insights into galaxy dynamics. The temporal pattern of neutrinos during these events serves as a distinctive and valuable information source, shedding light on collapsing star mechanisms and particle behaviors in densely …

Maroc, fr, it (code pays fourni par la source)

Revisiting the hypothesis of purely stochastic excitation of global p modes in the Sun

E. Panetier, R.A. García, Sylvain Breton, A. Jiménez et autres

Context. In solar-like oscillators, acoustic waves are excited by turbulent motion in the convective envelope and propagate inward, generating a variety of standing pressure modes (p modes). When combining the power of several solar acoustic modes, some studies have reported an excess …

fr, it, es (code pays fourni par la source)

Analytic insight into the physics of the standing accretion shock instability

T. Foglizzo

Context. During the core collapse of a massive star, and immediately before its supernova explosion, there is amplification of asymmetric motions by the standing accretion shock instability (SASI). This imprints a frequency signature on the neutrino flux and the gravitational waves that …

fr (code pays fourni par la source)

Solar p-modes excitation rate along the magnetic activity cycle

E. Panetier, Sylvain Breton, R. A. García, Antonio Jiménez et autres

Magnetic cycles of solar-like stars influence their internal physics. Thus, the frequency, amplitude, excitation rate, and damping of the acoustic oscillation modes (p-modes) vary with the cycle over time. We need to understand the impact of magnetic activity on p-modes in order …

Convective vortices in collapsing stars

Yerassyl Telman, Ernazar Abdikamalov, T. Foglizzo

ABSTRACT Recent studies show that non-radial structures arising from massive star shell convection play an important role in shaping core-collapse supernova explosions. During the collapse phase, convective vortices generate acoustic waves that interact with the supernova shock. This amplifies turbulence in the …

kz, fr (code pays fourni par la source)

Analytic insight into the physics of SASI I. Shock instability in a non-rotating stellar core

T. Foglizzo

During the core collapse of a massive star just before its supernova explosion, the amplification of asymmetric motions by the standing accretion shock instability (SASI) imprints on the neutrino flux and the gravitational waves a frequency signature carrying direct information on the …

fr (code pays fourni par la source)

Prospects for realtime characterization of core-collapse supernova and neutrino properties

M. Bendahman, Isabel Goos, J. A. B. Coelho, Matteo Bugli et autres

Abstract Core-collapse supernovae (CCSNe) offer extremely valuable insights into the dynamics of galaxies. Neutrino time profiles from CCSNe, in particular, could reveal unique details about collapsing stars and particle behavior in dense environments. However, CCSNe in our galaxy and the Large Magellanic …

Maroc, fr, it (code pays fourni par la source)

Detectability of Late-time Supernova Neutrinos with Fallback Accretion onto Protoneutron Star

Ryuichiro Akaho, Hiroki Nagakura, T. Foglizzo

Abstract We investigate the late-time neutrino emission powered by fallback mass accretion onto a protoneutron star (PNS), using neutrino radiation-hydrodynamic simulations with full Boltzmann neutrino transport. We follow the time evolution of the accretion flow onto the PNS until the system reaches …

jp, fr (code pays fourni par la source)

Prospects for realtime characterization of core-collapse supernova and neutrino properties

M. Bendahman, Isabel Goos, J. A. B. Coelho, Matteo Bugli et autres

Core-collapse supernovae (CCSNe) offer extremely valuable insights into the dynamics of galaxies. Neutrino time profiles from CCSNe, in particular, could reveal unique details about collapsing stars and particle behavior in dense environments. However, CCSNe in our galaxy and the Large Magellanic Cloud …

Core-collapse supernovae: from “nu” physics to new physics

M. Bendahman, Paul Barrère, Anne-Cécile Buellet, Matteo Bugli et autres

Core-collapse supernovae (CCSNe) are important astronomical events that provide crucial information about the dynamics of the Universe. Time profile of neutrinos in core-collapse supernovae is a unique and valuable source of information about the mechanism of collapsing stars and the behavior of …

fr, Maroc, be (code pays fourni par la source)

Effect of stellar rotation on the development of post-shock instabilities during core-collapse supernovae

Anne-Cécile Buellet, T. Foglizzo, Jérôme Guilet, Ernazar Abdikamalov

Context.The growth of hydrodynamical instabilities is key to triggering a core-collapse supernova explosion during the phase of stalled accretion shock, immediately after the birth of a proto-neutron star (PNS). Stellar rotation is known to affect the standing accretion shock instability (SASI) even …

fr, kz (code pays fourni par la source)

Detectability of Late-time Supernova Neutrinos with Fallback Accretion onto Protoneutron star

Ryuichiro Akaho, Hiroki Nagakura, T. Foglizzo

We investigate the late-time neutrino emission powered by fallback mass accretion onto proto-neutron star (PNS), using neutrino radiation-hydrodynamic simulations with full Boltzmann neutrino transport. We follow the time evolution of accretion flow onto PNS until the system reaches a steady state. A …