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Late-time radio rebrightening of gamma-ray burst afterglows: Evidence for double-sided jets
Li Z(黎卓); Song LM(宋黎明); Li, Z; Song, LM
2004
发表期刊ASTROPHYSICAL JOURNAL
卷号614期号:1页码:L17-L20
通讯作者Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, Beijing 100039, Peoples R China
文章类型Article
摘要The central engine of gamma-ray bursts (GRBs) is believed to eject double-sided ultrarelativistic jets. For an observed GRB, one of the twin jets points toward us and is responsible for the prompt gamma-ray and subsequent afterglow emission. We consider in this Letter the other receding jet, which is expected to give rise to late-time radio rebrightening (RRB) when it becomes nonrelativistic (NR) and radiatively isotropic. The RRB peaks at a time 5t(NR)=2(E(j,51)/n)(1/3) yr after the GRB (where t(NR) is the observed NR timescale for the preceding jet, E(j) is the jet energy, and n is the ambient medium density). The peak flux is comparable to the preceding jet emission at t(NR). We expect the RRB of GRB 030329 1.7 yr after the burst, with a flux of similar to0.6 mJy at 15 GHz. The cases of GRBs 970508 and 980703 have also been discussed. The detection of RRB, which requires a dense monitoring campaign as much as a few years after a GRB, will be the direct evidence for the existence of double-sided jets in GRBs and prove the black hole-disk system formation in the cores of progenitors.
关键词gamma rays : bursts ISM : jets and outflows radio continuum : general
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/425498
URL查看原文
语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000224367100005
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240256
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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Li Z,Song LM,Li, Z,et al. Late-time radio rebrightening of gamma-ray burst afterglows: Evidence for double-sided jets[J]. ASTROPHYSICAL JOURNAL,2004,614(1):L17-L20.
APA 黎卓,宋黎明,Li, Z,&Song, LM.(2004).Late-time radio rebrightening of gamma-ray burst afterglows: Evidence for double-sided jets.ASTROPHYSICAL JOURNAL,614(1),L17-L20.
MLA 黎卓,et al."Late-time radio rebrightening of gamma-ray burst afterglows: Evidence for double-sided jets".ASTROPHYSICAL JOURNAL 614.1(2004):L17-L20.
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