PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组
X-ray emission lines in GRB afterglows: Evidence for a two-component jet model
Gao, WH; Wei, DM
2005
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
ISSN1009-9271
Volume5Issue:6Pages:571-578
AbstractX-ray emission lines have been observed in X-ray afterglows of several gamma-ray bursts (GRBs). It is a major breakthrough for understanding the nature of the progenitors. It has been proposed that the X-ray emission lines can be well explained by the Geometry-Dominated models, but in these models the illuminating angle is much larger than that of the collimated jet of the GRB. For GRB 011211, we have obtained an illuminating angle of about theta similar to 45 degrees, while the angle of the GRB jet is only 3.6 degrees. So we propose that the outflow of GRBs with emission lines should have two distinct components: a wide component that illuminates the reprocessing material and produces the emission lines and a narrow one that produces the GRB. Observations show the energy for producing the emission lines is higher than that of the GRB. In this case, when the wide component dominates the afterglows, a bump should appear in the GRB afterglow. For GRB 011211, the bump should occur within 0.05 days of the GRB, which is obviously too early for the observation to catch it. Alongside the X-ray emission lines there should also be a bright emission component between the UV and the soft X-rays. These features can be tested by the Swift satellite in the near future.
KeywordGamma Rays : Bursts Line : Profiles Ism : Jets And Outflows Supernovae : General
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordBURST AFTERGLOWS ; ENERGY RESERVOIR ; IRON LINE ; PROGENITORS ; DISCOVERY ; ORIGIN ; EJECTA ; SHOCK
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000234124400002
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4196
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
Recommended Citation
GB/T 7714
Gao, WH,Wei, DM. X-ray emission lines in GRB afterglows: Evidence for a two-component jet model[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2005,5(6):571-578.
APA Gao, WH,&Wei, DM.(2005).X-ray emission lines in GRB afterglows: Evidence for a two-component jet model.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,5(6),571-578.
MLA Gao, WH,et al."X-ray emission lines in GRB afterglows: Evidence for a two-component jet model".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 5.6(2005):571-578.
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