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Long-term continuous energy injection in the afterglow of GRB 060729
Xu, Ming1; Huang, Yong-Feng1; Lu, Tan2
2009-12-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume9Issue:12Pages:1317-1323
AbstractA long plateau phase and an amazing level of brightness have been observed in the X-ray afterglow of GRB 060729. This peculiar light curve is likely due to long-term energy injection in external shock. Here, we present a detailed numerical study of the energy injection process of magnetic dipole radiation from a strongly magnetized millisecond pulsar and model the multi-band afterglow observations. It is found that this model can successfully explain the long plateaus in the observed X-ray and optical afterglow light curves. The sharp break following the plateaus could be due to the rapid decline of the emission power of the central pulsar. At an even later time (similar to 5 x 10(6) s), an obvious jet break appears, which implies a relatively large half opening angle of theta similar to 0.3 for the GRB ejecta. Due to the energy injection, the Lorentz factor of the outflow is still larger than two even at 10(7) s after the GRB trigger, making the X-ray afterglow of this burst detectable by Chandra even 642 d after the burst.
KeywordGamma Rays: Bursts Ism: Jets And Outflows
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordGAMMA-RAY BURST ; 28 FEBRUARY 1997 ; SWIFT XRT DATA ; THEORETICAL IMPLICATIONS ; LIGHT CURVES ; MODEL ; EVOLUTION ; EMISSION ; STARS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000272967100003
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15924
Collection院士文集_陆埮
Affiliation1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Xu, Ming,Huang, Yong-Feng,Lu, Tan. Long-term continuous energy injection in the afterglow of GRB 060729[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(12):1317-1323.
APA Xu, Ming,Huang, Yong-Feng,&Lu, Tan.(2009).Long-term continuous energy injection in the afterglow of GRB 060729.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(12),1317-1323.
MLA Xu, Ming,et al."Long-term continuous energy injection in the afterglow of GRB 060729".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.12(2009):1317-1323.
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