Diffuse high energy neutrinos and cosmic rays from hyperflares of soft-gamma repeaters

✍ Scribed by Xue-Wen Liu; Xue-Feng Wu; Tan Lu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 173 KB
• Volume: 15
• Category: Article
• ISSN: 1384-1076
• DOI: 10.1016/j.newast.2009.08.006

✦ Synopsis

We calculate the diffuse high energy (TeV-PeV) neutrino emission from hyperflares of soft-gamma repeaters (SGRs), like the hyperflare risen from SGR 1806-20 on December 27 of 2004, within the framework of the fireball model. The fireball model for gamma-ray bursts (GRBs) can explain well the main features of this hyperflare and the subsequent multi-frequency afterglow emission. The expected rate, $ 20-100 Gpc À3 day À1 , of such hyperflares is well in excess of the GRBs rate. Our result shows that the contribution to the diffuse TeV-PeV neutrino background from such hyperflares is less than 10% of the contribution from GRBs. We also discuss the high energy cosmic rays (CRs) from these sources.