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We assert that non-linear features of fast neutrino-flavor conversion (FFC) can be qualitatively different between core-collapse supernovae (CCSNe) and binary neutron star mergers (BNSMs). This argument arises from recent global FFC…

High Energy Astrophysical Phenomena · Physics 2025-05-22 Masamichi Zaizen , Hiroki Nagakura

In very dense environments, neutrinos can undergo fast flavor conversions on scales as short as a few centimeters provided that the angular distribution of the neutrino lepton number crosses zero. This work presents the first attempt to…

High Energy Astrophysical Phenomena · Physics 2021-05-05 Francesco Capozzi , Sajad Abbar , Robert Bollig , H. -Thomas Janka

Super-Eddington accretion of neutron stars (NSs) has been suggested both observationally and theoretically. In this paper, we propose that NSs in close-orbit binary systems with companions of helium (He) stars, most of which systems form…

High Energy Astrophysical Phenomena · Physics 2024-03-25 Jin-Ping Zhu , Ying Qin , Zhen-Han-Tao Wang , Rui-Chong Hu , Bing Zhang , Shichao Wu

The flavor transformation in a dense neutrino gas can have a significant impact on the physical and chemical evolution of its surroundings. In this work we demonstrate that a dynamic, fast flavor oscillation wave can develop spontaneously…

High Energy Physics - Phenomenology · Physics 2019-11-19 Joshua D. Martin , Changhao Yi , Huaiyu Duan

We all know that in the dense anisotropic interior of the star, neutrino-neutrino forward-scattering can lead to fast collective neutrino oscillations, which has striking consequences on flavor dependent neutrino emission and can be crucial…

High Energy Physics - Phenomenology · Physics 2021-01-06 Soumya Bhattacharyya

Recent gravitational wave observations of neutron star-neutron star and neutron star-black hole binaries appear to indicate that massive neutron stars may not be too uncommon in merging systems. In this manuscript, we present a first set of…

High Energy Astrophysical Phenomena · Physics 2023-06-14 Francois Foucart , Matthew D. Duez , Roland Haas , Lawrence E. Kidder , Harald P. Pfeiffer , Mark A. Scheel , Elizabeth Spira-Savett

Fast flavor conversions (FFCs) of neutrinos, which can occur in core-collapse supernovae (CCSNe), are multiangle effects. They depend on the angular distribution of the neutrino's electron lepton number (ELN). In this work, we present a…

High Energy Astrophysical Phenomena · Physics 2025-04-22 Zewei Xiong , Meng-Ru Wu , Manu George , Chun-Yu Lin , Noshad Khosravi Largani , Tobias Fischer , Gabriel Martínez-Pinedo

Neutrino flavor transformations in core-collapse supernovae and binary neutron star mergers represent a complex and unsolved problem that is integral to our understanding of the dynamics and nucleosynthesis in these environments. The high…

High Energy Physics - Phenomenology · Physics 2023-05-02 Amol V. Patwardhan , Michael J. Cervia , Ermal Rrapaj , Pooja Siwach , A. B. Balantekin

We investigate the collision-induced flavor instability in homogeneous, isotropic, dense neutrino gases in the two-flavor mixing scenario with energy-dependent scattering. We uncover a simple expression of the growth rate of this…

High Energy Physics - Phenomenology · Physics 2023-04-27 Yu-Chia Lin , Huaiyu Duan

Nuclear star clusters surrounding supermassive black holes (SMBHs) in galactic nuclei contain large numbers of stars, black holes (BHs) and neutron stars (NSs), a fraction of which are likely to form binaries. These binaries were suggested…

Astrophysics of Galaxies · Physics 2019-06-19 Giacomo Fragione , Evgeni Grishin , Nathan W. C. Leigh , Hagai. B. Perets , Rosalba Perna

We present a first simulation of the post-merger evolution of a black hole-neutron star binary in full general relativity using an energy-integrated general relativistic truncated moment formalism for neutrino transport. We describe our…

Neutron star mergers are believed to occur in accretion disks around supermassive black holes. Here we show that a putative jet launched from the merger of a binary neutron star (BNS) or a neutron star--black hole (NSBH) merger occurring at…

High Energy Astrophysical Phenomena · Physics 2021-01-15 Jin-Ping Zhu , Bing Zhang , Yun-Wei Yu , He Gao

Fast flavor conversions of supernova neutrinos, possible near the neutrinosphere, depends on an interesting interplay of collisions and neutrino oscillations. Contrary to naive expectations, the rate of self-induced neutrino oscillations,…

High Energy Physics - Phenomenology · Physics 2019-03-13 Francesco Capozzi , Basudeb Dasgupta , Alessandro Mirizzi , Manibrata Sen , Günter Sigl

The formation histories of compact binary mergers, especially stellar-mass binary-black hole mergers, have recently come under increased scrutiny and revision. In this paper we revisit the question of the dominant formation channel and…

High Energy Astrophysical Phenomena · Physics 2023-08-28 Monica Gallegos-Garcia , Christopher P L Berry , Vicky Kalogera

Neutrinos emitted from a supernova may undergo flavor conversions almost immediately above the core, with possible consequences for supernova dynamics and nucleosynthesis. However, the precise conditions for such fast conversions can be…

High Energy Physics - Phenomenology · Physics 2018-11-07 Basudeb Dasgupta , Alessandro Mirizzi , Manibrata Sen

Neutron star merger remnants are unique sites for exploring neutrino flavor conversion in dense media. Because of the natural excess of $\bar{\nu}_e$ over $\nu_e$, the neutrino-neutrino potential can cancel the matter potential, giving rise…

High Energy Astrophysical Phenomena · Physics 2024-05-06 Ian Padilla-Gay , Shashank Shalgar , Irene Tamborra

Neutrino flavor conversions may dramatically affect the inner working of compact astrophysical objects as well as the synthesis of the heavier elements. We present the first sophisticated numerical solution of the neutrino flavor conversion…

High Energy Astrophysical Phenomena · Physics 2020-07-01 Shashank Shalgar , Ian Padilla-Gay , Irene Tamborra

Stellar mass black holes (SMBHs), forming by the core collapse of very massive, rapidly rotating stars, are expected to exhibit a high density accretion disk around them developed from the spinning mantle of the collapsing star. A wide…

High Energy Astrophysical Phenomena · Physics 2013-08-07 Indrani Banerjee , Banibrata Mukhopadhyay

While it is well known that neutrinos are emitted from standard core collapse protoneutron star supernovae, less attention has been focused on neutrinos from accretion disks. These disks occur in some supernovae (i.e. "collapsars") as well…

High Energy Astrophysical Phenomena · Physics 2010-01-15 O. L. Caballero , G. C. McLaughlin , R. Surman

The last decade of observational and theoretical developments in stellar and binary evolution provides an opportunity to incorporate major improvements to the predictions from populations synthesis models. We compute the Galactic merger…

High Energy Astrophysical Phenomena · Physics 2015-06-04 Michal Dominik , Krzysztof Belczynski , Christopher Fryer , Daniel Holz , Emanuele Berti , Tomasz Bulik , Ilya Mandel , Richard O'Shaughnessy
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