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REVISITING THE EMISSION FROM RELATIVISTIC BLAST WAVES IN A DENSITY-JUMP MEDIUM
Geng, J. J.1,2; Wu, X. F.3,4,5; Li, Liang6; Huang, Y. F.1,2; Dai, Z. G.1,2
2014-09-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume792Issue:1Pages:0
AbstractRe-brightening bumps are frequently observed in gamma-ray burst afterglows. Many scenarios have been proposed to interpret the origin of these bumps, of which a blast wave encountering a density-jump in the circumburst environment has been questioned by recent works. We develop a set of differential equations to calculate the relativistic outflow encountering the density-jump by extending the work of Huang et al. This approach is a semi-analytic method and is very convenient. Our results show that late high-amplitude bumps cannot be produced under common conditions, rather only a short plateau may emerge even when the encounter occurs at an early time (< 10(4) s). In general, our results disfavor the density-jump origin for those observed bumps, which is consistent with the conclusion drawn from full hydrodynamics studies. The bumps thus should be caused by other scenarios.
KeywordGamma-ray Burst: General Hydrodynamics Radiation Mechanisms: Non-thermal Shock Waves
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/792/1/31
WOS KeywordGAMMA-RAY BURST ; ENERGY INJECTION MODEL ; X-RAY ; LIGHT CURVES ; AFTERGLOW EMISSION ; 2-COMPONENT JET ; TEMPORAL STRUCTURE ; OPTICAL FLASHES ; DYNAMICAL MODEL ; GRB AFTERGLOWS
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Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000341172100031
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10604
Collection南极天文中心
Affiliation1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
4.Chinese Acad Sci, Chinese Ctr Antarctic Astron, Nanjing 210008, Jiangsu, Peoples R China
5.Nanjing Univ, Chinese Acad Sci, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China
6.Univ Stockholm, Dept Phys, SE-10691 Stockholm, Sweden
Recommended Citation
GB/T 7714
Geng, J. J.,Wu, X. F.,Li, Liang,et al. REVISITING THE EMISSION FROM RELATIVISTIC BLAST WAVES IN A DENSITY-JUMP MEDIUM[J]. ASTROPHYSICAL JOURNAL,2014,792(1):0.
APA Geng, J. J.,Wu, X. F.,Li, Liang,Huang, Y. F.,&Dai, Z. G..(2014).REVISITING THE EMISSION FROM RELATIVISTIC BLAST WAVES IN A DENSITY-JUMP MEDIUM.ASTROPHYSICAL JOURNAL,792(1),0.
MLA Geng, J. J.,et al."REVISITING THE EMISSION FROM RELATIVISTIC BLAST WAVES IN A DENSITY-JUMP MEDIUM".ASTROPHYSICAL JOURNAL 792.1(2014):0.
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