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The ultraviolet flash accompanying gamma-ray bursts from neutron-rich internal shocks
Fan, YZ; Wei, DM
2004-11-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume615Issue:2Pages:L69-L72
AbstractIn the neutron-rich internal shocks model for gamma-ray bursts (GRBs), the Lorentz factors (LFs) of ion shells are variable, and so are the LFs of accompanying neutron shells. For slow neutron shells with a typical LF of approximately tens, the typical beta-decay radius reads R-beta,R-s similar to several x 10(14) cm, which is much larger than the typical internal shocks radius similar to 10(13) cm, so their impact on the internal shocks may be unimportant. However, as GRBs last long enough [T-90 > 20(1+z) s], one earlier but slower ejected neutron shell will be swept successively by later ejected ion shells in the range similar to 10(13) - 10(15) cm, where slow neutrons have decayed significantly. We show in this work that ion shells interacting with the beta-decay products of slow neutron shells can power a UV flash bright to the 12th magnitude during the prompt gamma-ray emission phase or slightly delayed, which could be detected by the upcoming satellite Swift in the near future.
KeywordGamma Rays : Bursts Radiation Mechanisms : Nonthermal Shock Waves
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordGEV NEUTRINOS ; AFTERGLOWS ; FIREBALLS ; EMISSION ; JETS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000225046600002
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7744
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA
Recommended Citation
GB/T 7714
Fan, YZ,Wei, DM. The ultraviolet flash accompanying gamma-ray bursts from neutron-rich internal shocks[J]. ASTROPHYSICAL JOURNAL,2004,615(2):L69-L72.
APA Fan, YZ,&Wei, DM.(2004).The ultraviolet flash accompanying gamma-ray bursts from neutron-rich internal shocks.ASTROPHYSICAL JOURNAL,615(2),L69-L72.
MLA Fan, YZ,et al."The ultraviolet flash accompanying gamma-ray bursts from neutron-rich internal shocks".ASTROPHYSICAL JOURNAL 615.2(2004):L69-L72.
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