2017/08/31 by Shunsaku Horiuchi, Ko Nakamura, Tomoya Takiwaki +1
Physics and Astronomy · #Accretion (finance) #Astrophysics and Cosmic Phenomena #Compact space #Core (optical fiber) #Gamma-ray bursts and supernovae #Neutrino #Neutrino Physics Research #Phase (matter) #Stars #Supernova #astro-ph.HE #hep-ex
paper · pdf · doi:10.1088/1361-6471/aa8f1f
published as J.Phys. G44 (2017) no.11, 114001 · 11 pages, 4 figures; accepted for publication in "Focus on microphysics in core-collapse supernovae: 30 years since SN1987A" issue of Journal of Physics G
arxiv created 2017/09/05 · openalex created_date 2017/09/15 · openalex publication_date 2017/09/26 · arxiv updated 2018/01/30 · openalex updated_date 2026/08/06
Abstract 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– <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mn>30</mml:mn> <mml:mspace width="0.25em"/> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>⊙</mml:mo> </mml:mrow> </mml:msub> </mml:mrow> </mml:math> , and focus on their connections to the progenitor compactness. The compactness is a measure of the mass density profile of the progenitor core and recent investigations have suggested its salient connections to the outcomes of core collapse. Our simulations confirm a correlation between the neutrinos emitted during the accretion phase and the progenitor’s compactness, and that the ratio of observed neutrino events during the first hundreds of milliseconds provides a promising handle on the progenitor’s inner structure. Neutrino flavor mixing during the accretion phase remains a large source of uncertainty.