Search for the signatures of a new-born black hole from the collapse of a supra-massive millisecond magnetar in short grb light curves
文献类型：期刊论文
| 作者 | Zhang, Q.1; Lei, W. H.2; Zhang, B. B.3,4,5; Chen, W.2; Xiong, S. L.1; Song, L. M.1 |
| 刊名 | Monthly notices of the royal astronomical society
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 475期号:1页码:266-276 |
| ISSN号 | 0035-8711 |
| 关键词 | Accretion, accretion discs Gamma-ray burst: individual: (grb 101219a, grb 160821b) Stars: magnetars |
| DOI | 10.1093/mnras/stx3229 |
| 通讯作者 | Zhang, q.(zhangqiang@ihep.ac.cn) ; Lei, w. h.(leiwh@hust.edu.cn) ; Xiong, s. l.(xiongsl@ihep.ac.cn) |
| 英文摘要 | 'internal plateau' followed by a sharp decay is commonly seen in short gamma-ray burst (grb) light curves. the plateau component is usually interpreted as the dipole emission from a supra-massive magnetar, and the sharp decay may imply the collapse of the magnetar to a black hole (bh). fall-back accretion on to the new-born bh could produce long-lasting activities via the blandford-znajek (bz) process. the magnetic flux accumulated near the bh would be confined by the accretion discs for a period of time. as the accretion rate decreases, the magnetic flux is strong enough to obstruct gas infall, leading to a magnetically arrested disc. within this scenario, we show that the bz process could produce two types of typical x-ray light curves: type i exhibits a long-lasting plateau, followed by a power-law (pl) decay with slopes ranging from 5/3 to 40/9; type ii shows roughly a single pl decay with a slope of 5/3. the former requires low magnetic field strength, while the latter corresponds to relatively high values. we search for such signatures of the new-born bh from a sample of short grbs with an internal plateau, and find two candidates: grb 101219a and grb 160821b, corresponding to type ii and type i light curves, respectively. it is shown that our model can explain the data very well. |
| WOS关键词 | GAMMA-RAY BURSTS ; COMPACT-OBJECT MERGERS ; COOLED ACCRETION DISKS ; MERGING NEUTRON-STARS ; FAST RADIO-BURSTS ; EXTENDED EMISSION ; CENTRAL ENGINE ; FALLBACK ACCRETION ; SPIN-DOWN ; AFTERGLOW |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000427144200022 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178182 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Zhang, Q.; Lei, W. H.; Xiong, S. L. |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China 3.CSIC, IAA, POB 03004, E-18080 Granada, Spain 4.Scientist Support LLC, Madsion, AL 35758 USA 5.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Q.,Lei, W. H.,Zhang, B. B.,et al. Search for the signatures of a new-born black hole from the collapse of a supra-massive millisecond magnetar in short grb light curves[J]. Monthly notices of the royal astronomical society,2018,475(1):266-276. |
| APA | Zhang, Q.,Lei, W. H.,Zhang, B. B.,Chen, W.,Xiong, S. L.,&Song, L. M..(2018).Search for the signatures of a new-born black hole from the collapse of a supra-massive millisecond magnetar in short grb light curves.Monthly notices of the royal astronomical society,475(1),266-276. |
| MLA | Zhang, Q.,et al."Search for the signatures of a new-born black hole from the collapse of a supra-massive millisecond magnetar in short grb light curves".Monthly notices of the royal astronomical society 475.1(2018):266-276. |
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