Photospheric emission in gamma-ray bursts

被引：31

作者：

Pe'er, Asaf ^{[1
]}

Ryde, Felix ^{[2
,3
]}

机构：

[1] Univ Coll Cork, Phys Dept, Cork, Ireland

[2] AlbaNova, KTH Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden

[3] AlbaNova, Oskar Klein Ctr, SE-10691 Stockholm, Sweden

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2017年 / 26卷 / 10期

关键词：

Gamma-rays bursts; hydrodynamics; radiation mechanism: nonthermal; radiation mechanism: thermal; INTERNAL SHOCK MODEL; PAIR-ELECTROMAGNETIC PULSE; MONTE-CARLO SIMULATIONS; SCALE MAGNETIC-FIELDS; GRB PROMPT EMISSION; SPECTRAL PROPERTIES; RELATIVISTIC JETS; THERMAL EMISSION; PEAK ENERGY; BLACK-HOLE;

D O I：

10.1142/S021827181730018X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A major breakthrough in our understanding of gamma-ray bursts (GRB) prompt emission physics occurred in the last few years, with the realization that a thermal component accompanies the over-all nonthermal prompt spectra. This thermal part is important by itself, as it provides direct probe of the physics in the innermost outflow regions. It further has an indirect importance, as a source of seed photons for inverse-Compton scattering, thereby it contributes to the nonthermal part as well. In this short review, we highlight some key recent developments. Observationally, although so far it was clearly identified only in a minority of bursts, there is indirect evidence that a thermal component exists in a very large fraction of GRBs, possibly close to 100%. Theoretically, the existence of a thermal component has a large number of implications as a probe of underlying GRB physics. Some surprising implications include its use as a probe of the jet dynamics, geometry and magnetization.

引用

页数：34

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