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MODELING THE MULTI-BAND AFTERGLOW OF GRB 130831A: EVIDENCE FOR A SPINNING-DOWN MAGNETAR DOMINATED BY GRAVITATIONAL WAVE LOSSES?
Zhang, Q; Huang, YF; Zong, HS; Zhang, Q (reprint author), Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China.; Zhang, Q (reprint author), Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China.
2016
发表期刊ASTROPHYSICAL JOURNAL
卷号823期号:2页码:156
文章类型Article
摘要The X-ray afterglow of GRB 130831A shows an "internal plateau" with a decay slope of similar to 0.8, followed by a steep drop at around 10(5) s with a slope of similar to 6. After the drop, the X-ray afterglow continues with a much shallower decay. The optical afterglow exhibits two segments of plateaus separated by a luminous optical flare, followed by a normal decay with a slope basically consistent with that of the late-time X-ray afterglow. The decay of the internal X-ray plateau is much steeper than what we expect in the simplest magnetar model. We propose a scenario in which the magnetar undergoes gravitational-wave-driven r-mode instability, and the spin-down is dominated by gravitational wave losses up to the end of the steep plateau, so that such a relatively steep plateau can be interpreted as the internal emission of the magnetar wind and the sharp drop can be produced when the magnetar collapses into a black hole. This scenario also predicts an initial X-ray plateau lasting for hundreds of seconds with an approximately constant flux which is compatible with observation. Assuming that the magnetar wind has a negligible contribution in the optical band, we interpret the optical afterglow as the forward shock emission by invoking the energy injection from a continuously refreshed shock following the prompt emission phase. It is shown that our model can basically describe the temporal evolution of the multi-band afterglow of GRB 130831A.
关键词Gamma-ray Burst: Individual (Grb 130831a) Gravitational Waves Ism: Jets And Outflows Stars: Neutron
学科领域Astronomy & Astrophysics
资助者National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097]
DOIhttp://dx.doi.org/10.3847/0004-637X/823/2/156
关键词[WOS]GAMMA-RAY BURSTS ; ROTATING RELATIVISTIC STARS ; NEWLY BORN MAGNETARS ; SWIFT XRT DATA ; LIGHT CURVES ; ENERGY INJECTION ; MILLISECOND MAGNETAR ; CENTRAL ENGINE ; NEUTRON-STARS ; EXTENDED EMISSION
收录类别SCI
语种英语
资助者National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Basic Research Program of China [2014CB845800] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097] ; National Natural Science Foundation of China [11473012, 11475085, 11275097]
WOS类目Astronomy & Astrophysics
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21633
专题理论物理所SCI论文
通讯作者Zhang, Q (reprint author), Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China.; Zhang, Q (reprint author), Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China.
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Zhang, Q,Huang, YF,Zong, HS,et al. MODELING THE MULTI-BAND AFTERGLOW OF GRB 130831A: EVIDENCE FOR A SPINNING-DOWN MAGNETAR DOMINATED BY GRAVITATIONAL WAVE LOSSES?[J]. ASTROPHYSICAL JOURNAL,2016,823(2):156.
APA Zhang, Q,Huang, YF,Zong, HS,Zhang, Q ,&Zhang, Q .(2016).MODELING THE MULTI-BAND AFTERGLOW OF GRB 130831A: EVIDENCE FOR A SPINNING-DOWN MAGNETAR DOMINATED BY GRAVITATIONAL WAVE LOSSES?.ASTROPHYSICAL JOURNAL,823(2),156.
MLA Zhang, Q,et al."MODELING THE MULTI-BAND AFTERGLOW OF GRB 130831A: EVIDENCE FOR A SPINNING-DOWN MAGNETAR DOMINATED BY GRAVITATIONAL WAVE LOSSES?".ASTROPHYSICAL JOURNAL 823.2(2016):156.
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