GeV EMISSION FROM COLLISIONAL MAGNETIZED GAMMA-RAY BURSTS

被引：54

作者：

Meszaros, P. ^{[1
,2
]}

Rees, M. J. ^{[3
]}

机构：

[1] Penn State Univ, Dept Phys, Dept Astron & Astrophys, University Pk, PA 16802 USA

[2] Penn State Univ, Ctr Particle Astrophys, Davey Lab 525, University Pk, PA 16802 USA

[3] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 733卷 / 02期

基金：

美国国家科学基金会;

关键词：

gamma-ray burst: general; gamma rays: stars; magnetic fields; neutrinos; X-rays: stars; HIGH-ENERGY EMISSION; SHORT GRB 090510; FERMI OBSERVATIONS; GEV NEUTRINOS; ACCELERATION; FIREBALLS; OUTFLOWS; COMPONENT; DISSIPATION; PHOTOSPHERE;

D O I：

10.1088/2041-8205/733/2/L40

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Magnetic fields may play a dominant role in gamma-ray bursts, and recent observations by Fermi indicate that GeV radiation, when detected, arrives delayed by seconds from the onset of the MeV component. Motivated by this, we discuss a magnetically dominated jet model where both magnetic dissipation and nuclear collisions are important. We show that, for parameters typical of the observed bursts, such a model involving a realistic jet structure can reproduce the general features of the MeV and a separate GeV radiation component, including the time delay between the two. The model also predicts a multi-GeV neutrino component.

引用

页数：5

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