Effects of the cosmic infrared background on delayed high-energy emission from gamma-ray bursts

被引：30

作者：

Murase, Kohta ^{[1
]}

Asano, Katsuaki ^{[2
]}

Nagataki, Shigehiro ^{[1
,3
]}

机构：

[1] Kyoto Univ, Yukawa Inst Theoret Phys, Sakyo Ku, Kyoto 6068502, Japan

[2] Natl Astron Observ, Div Theoret Astron, Mitaka, Tokyo 1818588, Japan

[3] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA

来源：

ASTROPHYSICAL JOURNAL | 2007年 / 671卷 / 02期

关键词：

gamma rays : bursts; infrared : general; radiation mechanisms : nonthermal;

D O I：

10.1086/523031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Regenerated high-energy emissions from gamma-ray bursts are studied in detail. If the intrinsic primary spectrum extends to the TeV range, these very high energy photons will be absorbed by the cosmic infrared background (CIB). The high-energy electron-positron pairs thus created mainly upscatter cosmic microwave background (CMB) photons, and secondary photons are generated in the GeV-TeV range. These secondary delayed photons may be observed in the near future and would be useful as a consistency check on the intrinsic primary spectrum. In this paper, we focus on the effects of the CIB on the delayed secondary emission. In particular, we show that not only are upscattered CMB photons important but also upscattered CIB photons, especially for low-redshift bursts. These also provide additional information about the CIB, whose photon density has not definitively been determined so far.

引用

页码：1886 / 1895

页数：10

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