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Massive stars can explode as supernovae at the end of their life cycle, releasing neutrinos whose total energy reaches $10^{53}$ erg. Moreover, neutrinos play key roles in supernovae, heating and reviving the shock wave as well as cooling…

High Energy Astrophysical Phenomena · Physics 2022-06-03 Masamitsu Mori , Yudai Suwa , Ken'ichiro Nakazato , Kohsuke Sumiyoshi , Masayuki Harada , Akira Harada , Yusuke Koshio , Roger A. Wendell

The neutrinos emitted from the proto-neutron star created in a core-collapse supernova must run through a significant amount of turbulence before exiting the star. Turbulence can modify the flavor evolution of the neutrinos imprinting…

High Energy Physics - Phenomenology · Physics 2015-07-22 James P. Kneller , Neel V. Kabadi

During the merger of a black hole and a neutron star, baryonic mass can become unbound from the system. Because the ejected material is extremely neutron-rich, the r-process rapidly synthesizes heavy nuclides as the material expands and…

Neutrinos play an important role in compact star astrophysics: neutrino-heating is one of the main ingredients in core-collapse supernovae, neutrino-matter interactions determine the composition of matter in binary neutron star mergers and…

High Energy Astrophysical Phenomena · Physics 2020-09-16 Micaela Oertel , Aurélien Pascal , Marco Mancini , Jerome Novak

The usual treatments of the neutrino flavor-evolution, beyond a surface above the last scattering, assume identical angular distributions at this distance for the different initial (unmixed) flavors, and for particles and antiparticles.…

High Energy Astrophysical Phenomena · Physics 2016-03-02 R. F. Sawyer

Explosive nucleosynthesis is affected by many uncertainties, particularly regarding assumptions and prescriptions adopted during the evolution of the star. Moreover, simple explosion models are often used in the literature, which can…

High Energy Astrophysical Phenomena · Physics 2026-05-18 Luca Boccioli , Lorenzo Roberti

We argue that the small fraction of neutrinos that undergo direction-changing scattering outside of the neutrinosphere could have significant influence on neutrino flavor transformation in core-collapse supernova environments. We show that…

High Energy Physics - Phenomenology · Physics 2012-07-31 John F. Cherry , J. Carlson , Alexander Friedland , George M. Fuller , Alexey Vlasenko

We show that neutrinos can be produced through standard electroweak interactions in matter with time-dependent density.

Astrophysics · Physics 2009-11-07 Marieke Postma

The observation of neutrinos from Supernova~1987A has confirmed the theoretical conjecture that these particles play a crucial role during the collapse of the core of a massive star. Only one per cent of the energy they carry away from the…

Astrophysics · Physics 2007-05-23 H. -Th. Janka

We revisit a neutrino-driven r-process mechanism in the He shell of a core-collapse supernova, finding that it could succeed in early stars of metallicity < solar/1000, at relatively low temperatures and neutron densities, producing A ~ 130…

Solar and Stellar Astrophysics · Physics 2011-07-11 P. Banerjee , W. C. Haxton , Y. -Z. Qian

The direct URCA process of rapid neutrino emission can occur in nonuniform nuclear pasta phases that are expected in the inner crust of neutron stars. Here, the periodic potential for a nucleon in nuclear pasta allows momentum conservation…

Nuclear Theory · Physics 2020-10-14 Zidu Lin , Matthew E. Caplan , Charles J. Horowitz , Cecilia Lunardini

We present fully general-relativistic simulations of binary neutron star mergers with a temperature and composition dependent nuclear equation of state. We study the dynamical mass ejection from both quasi-circular and dynamical-capture…

High Energy Astrophysical Phenomena · Physics 2016-06-21 David Radice , Filippo Galeazzi , Jonas Lippuner , Luke F. Roberts , Christian D. Ott , Luciano Rezzolla

We have performed new Big Bang Nucleosynthesis calculations which employ arbitrarily-specified, time-dependent neutrino and antineutrino distribution functions for each of up to four neutrino flavors. We self-consistently couple these…

Astrophysics · Physics 2010-04-30 Christel J. Smith , George M. Fuller , Michael S. Smith

The superscaling approach is applied to studies of neutral current neutrino reactions in the quasielastic regime. Using input from scaling analyses of electron scattering data, predictions for high-energy neutrino and antineutrino cross…

Nuclear Theory · Physics 2008-11-26 J. E. Amaro , M. B. Barbaro , J. A. Caballero , T. W. Donnelly

Neutron stars are formed in core-collapse supernova explosions, where a large number of neutrinos are emitted. In this paper, supernova neutrino light curves are computed for the cooling phase of protoneutron stars, which lasts a few…

High Energy Astrophysical Phenomena · Physics 2020-03-18 Ken'ichiro Nakazato , Hideyuki Suzuki

Accretion of gas during the large scale structure formation has been thought to give rise to shocks that can accelerate cosmic rays. This process then results in an isotropic extragalactic gamma-ray emission contributing to the…

High Energy Astrophysical Phenomena · Physics 2015-06-30 Aleksandra Dobardzic , Tijana Prodanovic

Neutrinos from supernova (SN) bursts can give rise to detectable number of nuclear recoil (NR) events through the coherent elastic neutrino-nucleus scattering (CE$\nu$NS) process in large scale liquid xenon detectors designed for direct…

High Energy Astrophysical Phenomena · Physics 2022-01-26 Sayan Ghosh , Abhijit Bandyopadhyay , Pijushpani Bhattacharjee , Sovan Chakraborty , Kamales Kar , Satyajit Saha

Long duration gamma-ray bursts (GRBs) are among the least understood astrophysical transients powering the high-energy universe. To date, various mechanisms have been proposed to explain the observed electromagnetic GRB emission. In this…

High Energy Astrophysical Phenomena · Physics 2021-05-26 Tetyana Pitik , Irene Tamborra , Maria Petropoulou

We present shell model calculations of nuclear neutrino energy spectra for 70 $sd$-shell nuclei over the mass number range $A=21-35$. Our calculations include nuclear excited states as appropriate for the hot and dense conditions…

High Energy Astrophysical Phenomena · Physics 2018-01-10 G. Wendell Misch , Yang Sun , George M. Fuller

All of the actinides and roughly half the natural abundance of elements with mass number A > 70 come from the rapid neutron capture process, or the r-process. If the r-process, as suggested by many, occurs deep in a supernova, then it is…

Nuclear Theory · Physics 2007-05-23 Yong-Zhong Qian