| Optical flashes and very early afterglows in wind environments | |
| Wu, XF; Dai, ZG; Huang, YF; Lu, T | |
| 刊名 | Monthly notices of the royal astronomical society
 |
| 2003-07-11 | |
| 卷号 | 342期号:4页码:1131-1138 |
| 关键词 | Hydrodynamics Relativity Shock waves Gamma-rays : bursts |
| ISSN号 | 0035-8711 |
| 通讯作者 | Wu, xf(xfwu@nju.edu.cn) |
| 英文摘要 | 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 gamma-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. |
| WOS关键词 | GAMMA-RAY BURST ; LIGHT CURVES ; INTERACTION-MODELS ; FIREBALL MODEL ; ALPHA EMISSION ; GRB 990123 ; SUPERNOVA ; PROGENITORS ; PARAMETERS ; PREDICTIONS |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | WILEY-BLACKWELL |
| WOS记录号 | WOS:000183965000016 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2176364 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wu, XF |
| 作者单位 | 1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China 2.Chinese Acad Sci, LCRHEA, Inst High Energy Phys, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, XF,Dai, ZG,Huang, YF,et al. Optical flashes and very early afterglows in wind environments[J]. Monthly notices of the royal astronomical society,2003,342(4):1131-1138. |
| APA | Wu, XF,Dai, ZG,Huang, YF,&Lu, T.(2003).Optical flashes and very early afterglows in wind environments.Monthly notices of the royal astronomical society,342(4),1131-1138. |
| MLA | Wu, XF,et al."Optical flashes and very early afterglows in wind environments".Monthly notices of the royal astronomical society 342.4(2003):1131-1138. |
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