Impact of late-time neutrino emission on the diffuse supernova neutrino background

被引：12

作者：

Ekanger, Nick ^{[1
]}

Horiuchi, Shunsaku ^{[1
,2
]}

Kotake, Kei ^{[3
,4
]}

Sumiyoshi, Kohsuke ^{[5
]}

机构：

[1] Virginia Tech, Ctr Neutrino Phys, Dept Phys, Blacksburg, VA 24061 USA

[2] Univ Tokyo, UTIAS, Kavli IPMU WPI, Chiba 2778583, Japan

[3] Fukuoka Univ, Dept Appl Phys, Nanakuma Jonan 8 19 1, Fukuoka 8140180, Japan

[4] Fukuoka Univ, Res Inst Stellar Explos Phenomena, Nanakuma Jonan 8 19 1, Fukuoka 8140180, Japan

[5] Natl Inst Technol, Numazu Coll Technol, Ooka 3600, Numazu 4108501, Japan

来源：

PHYSICAL REVIEW D | 2022年 / 106卷 / 04期

基金：

日本学术振兴会;

关键词：

CORE-COLLAPSE SUPERNOVA; STAR-FORMATION RATE; EQUATION-OF-STATE; SIMULATIONS; EXPLOSION; BURST; CONSTRAINTS; TELESCOPE; EVOLUTION; SPECTRUM;

D O I：

10.1103/PhysRevD.106.043026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the absence of high-statistics supernova neutrino measurements, estimates of the diffuse supernova neutrino background (DSNB) hinge on the precision of simulations of core-collapse supernovae. Understanding the cooling phase of protoneutron star (PNS) evolution (>1 s after core bounce) is crucial, since approximately 50% of the energy liberated by neutrinos is emitted during the cooling phase. We model the cooling phase with a hybrid method by combining the neutrino emission predicted by 3D hydrodynamic simulations with several cooling-phase estimates, including a novel two-parameter correlation depending on the final baryonic PNS mass and the time of shock revival. We find that the predicted DSNB event rate at Super-Kamiokande can vary by a factor of-2-3 depending on the cooling-phase treatment. We also find that except for one cooling estimate, the range in predicted DSNB events is largely driven by the uncertainty in the neutrino mean energy. With a good understanding of the late-time neutrino emission, more precise DSNB estimates can be made for the next generation of DSNB searches.

引用

页数：15

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