Optical flashes and very early afterglows in wind environments
Optical flashes and very early afterglows in wind environments
复制标题
风环境中的闪光和极早余辉
DOI:
10.1046/j.1365-8711.2003.06602.x
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发表时间:
2003-04
影响因子:
4.8
通讯作者:
陆埮
中科院分区:
文献类型:
--
作者:
吴雪峰;戴子高;黄永锋;陆埮
The interaction of a relativistic fireball with its ambient medium is described through two shocks: a reverse shock that propagates into the fireball, and a forward shock that propagates into the medium. The observed optical flash of GRB 990123 has been considered to be the emission from such a reverse shock. The observational properties of afterglows suggest that the progenitors of some γ -ray bursts (GRBs) may be massive stars and their surrounding media may be stellar winds. We here study very early afterglows from the reverse and forward shocks in winds. An optical flash mainly arises from the relativistic reverse shock, while a radio flare is produced by the forward shock. The peak flux densities of optical flashes are larger than 1 Jy for typical parameters, if we do not take into account some appropriate dust obscuration along the line of sight. The radio flare always has a long-lasting constant flux, which will not be covered up by interstellar scintillation. The non-detections of optical flashes brighter than about ninth magnitude may constrain the GRB isotropic energies to be no more than a few 10 52 erg and wind intensities to be relatively weak.
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DOI:
10.1086/317869
发表时间:
2000-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
S. Kobayashi
通讯作者:
S. Kobayashi
DOI:
10.1086/312147
发表时间:
1999-04
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
R. Chevalier;Zhi-Yun Li
通讯作者:
R. Chevalier;Zhi-Yun Li
DOI:
10.1046/j.1365-8711.1998.01681.x
发表时间:
1998-06
影响因子:
4.8
作者:
Z. Dai;T. Lu
通讯作者:
Z. Dai;T. Lu
DOI:
10.1086/308031
发表时间:
1999-03
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Zhi-Yun Li;R. Chevalier
通讯作者:
Zhi-Yun Li;R. Chevalier
DOI:
--
发表时间:
2000
期刊:
--
影响因子:
--
作者:
通讯作者:
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