HADRONIC MODELS FOR THE EXTRA SPECTRAL COMPONENT IN THE SHORT GRB 090510

被引：94

作者：

Asano, Katsuaki ^{[1
]}

Guiriec, Sylvain ^{[2
]}

Meszaros, Peter ^{[3
]}

机构：

[1] Tokyo Inst Technol, Interact Res Ctr Sci, Meguro Ku, Tokyo 1528550, Japan

[2] Univ Alabama, Huntsville, AL 35899 USA

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

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 705卷 / 02期

基金：

美国国家科学基金会;

关键词：

cosmic rays; gamma rays: bursts; gamma rays: theory; radiation mechanisms: non-thermal; GAMMA-RAY BURSTS; ENERGY COSMIC-RAYS; EMISSION; NEUTRINOS; PHOTONS; ACCELERATION; GRB-941017;

D O I：

10.1088/0004-637X/705/2/L191

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A short gamma-ray burst GRB 090510 detected by Fermi shows an extra spectral component between 10 MeV and 30 GeV, an addition to a more usual low-energy (<10 MeV) Band component. In general, such an extra component could originate from accelerated protons. In particular, inverse Compton emission from secondary electron-positron pairs and proton synchrotron emission are competitive models for reproducing the hard spectrum of the extra component in GRB 090510. Here, using Monte Carlo simulations, we test the hadronic scenarios against the observed properties. To reproduce the extra component around GeV with these models, the proton injection isotropic-equivalent luminosity is required to be larger than 10(55) erg s(-1). Such large proton luminosities are a challenge for the hadronic models.

引用

页码：L191 / L194

页数：4

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