From the 1 of 11 linked papers with an AI index.
11 papers
Momentum Space Resolution Dependence in Boltzmann Neutrino Radiation Hydrodynamics Simulations of Core-collapse Supernovae
Ryuichiro Akaho
The paper investigates how the resolution of momentum space in Boltzmann neutrino transport affects the dynamics of core‑collapse supernova simulations, showing that coarse angular…
Bifurcated Impact of Neutrino Fast Flavor Conversion on Core-collapse Supernovae Informed by Multi-angle Neutrino Radiation Hydrodynamics
Ryuichiro Akaho, Hiroki Nagakura, Wakana Iwakami +6
In this {\it Letter}, we present a compelling and robust argument for the roles of neutrino fast flavor conversion (FFC) in the explosion mechanism of core-collapse supernova (CCSN…
Numerical Studies of Accretion Flows onto a Neutron Star Engulfed in a Massive Star
Daiyu Sakurai, Ryuichiro Akaho, Shoichi Yamada
Massive stars commonly form binaries that can evolve into compact systems via common envelope evolution (CEE), a critical but poorly understood phase -- especially when the compani…
Comprehensive neutrino light curves and spectra: from pre-supernova evolution to early supernova phase
Chinami Kato, Hiroki Nagakura, Akira Ito +4
We present the first systematic study of neutrino emissions from massive stars, continuously tracking the late evolutionary stages through the early core-collapse supernova phase.…
Neutrino Constraints on Black Hole Formation in M31
Yudai Suwa, Ryuichiro Akaho, Yosuke Ashida +9
We investigate neutrino signals associated with black hole formation resulting from the gravitational collapse of massive stars, motivated by the candidate failed supernova M31-201…
A Dual-Resolution Prescription in the Method for Boltzmann Neutrino Transport I: Proof of Principle and the Resolution of Collision Term
Akira Ito, Ryuichiro Akaho, Hiroki Nagakura +1
We propose a dual-resolution prescription meant for the Boltzmann neutrino transport, in which the advection and collision terms are calculated with different angular resolutions i…