MODELING THE MULTI-BAND AFTERGLOW OF GRB 130831A: EVIDENCE FOR A SPINNING-DOWN MAGNETAR DOMINATED BY GRAVITATIONAL WAVE LOSSES?
文献类型：期刊论文
| 作者 | Zhang, Q (reprint author), Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China.; Zhang, Q; Huang, YF; Zong, HS; Zhang, Q (reprint author), Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016 |
| 卷号 | 823期号:2页码:156 |
| 关键词 | Gamma-ray Burst: Individual (Grb 130831a) Gravitational Waves Ism: Jets And Outflows Stars: Neutron |
| DOI | http://dx.doi.org/10.3847/0004-637X/823/2/156 |
| 英文摘要 | 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. |
| 学科主题 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21633]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Zhang, Q (reprint author), Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China.; Zhang, Q (reprint author), Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Zhang, Q ,Zhang, Q,Huang, YF,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 ,Zhang, Q,Huang, YF,Zong, HS,&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. |
入库方式： OAI收割
来源：理论物理研究所
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