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Gamma-ray bursts: post-burst evolution of fireballs
Huang, YF; Dai, ZG; Wei, DM; Lu, T
1998-08-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume298Issue:2Pages:459-463
AbstractThe post-burst evolution of fireballs that produce gamma-ray bursts (GRBs) is studied, assuming the expansion of fireballs to be adiabatic and relativistic. Numerical results as well as an approximate analytic solution for the evolution are presented. Owing to the adoption of a new relation between t, R and gamma, our results differ markedly from previous studies. Synchrotron radiation from the shocked interstellar medium is carefully calculated, using a conventional set of equations, The observed X-ray flux of GRB afterglows can be reproduced easily. Although the optical afterglows seem much more complicated, our results can still present a rather satisfactory agreement with observations. We also find that the expansion will no longer be highly relativistic about 4 d after the main GRB. We thus suggest that the marginally relativistic phase of the expansion should be investigated so as to check the afterglows observed a week or more later.
KeywordRelativity Shock Waves Gamma-rays : Bursts
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS Keyword28 FEBRUARY 1997 ; OPTICAL COUNTERPART ; TEMPORAL STRUCTURE ; MAGNETIC-FIELDS ; AFTERGLOW ; MODELS ; TIMESCALES ; GRB970228 ; EMISSION ; STARS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000075941500018
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8355
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
3.CCAST, World Lab, Beijing 100080, Peoples R China
4.CAS, IHEP, LCRHEA, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Huang, YF,Dai, ZG,Wei, DM,et al. Gamma-ray bursts: post-burst evolution of fireballs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,1998,298(2):459-463.
APA Huang, YF,Dai, ZG,Wei, DM,&Lu, T.(1998).Gamma-ray bursts: post-burst evolution of fireballs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,298(2),459-463.
MLA Huang, YF,et al."Gamma-ray bursts: post-burst evolution of fireballs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 298.2(1998):459-463.
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