A magnetar-powered X-ray transient as the aftermath of a binary neutron-star merger
文献类型：期刊论文
| 作者 | Xue, Y. Q.1,2; Zheng, X. C.1,2,3; Li, Y.4 ; Brandt, W. N.5,6,7; Zhang, B.8,9,10; Luo, B.11,12,13; Zhang, B. -B.11,12,13; Bauer, F. E.14,15,16,17; Sun, H.9; Lehmer, B. D.18
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| 刊名 | NATURE
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| 出版日期 | 2019-04-11 |
| 卷号 | 568期号:7751页码:198-+ |
| ISSN号 | 0028-0836 |
| DOI | 10.1038/s41586-019-1079-5 |
| 通讯作者 | Xue, Y. Q.(xuey@ustc.edu.cn) ; Zheng, X. C.(zheng@strw.leidenuniv.nl) ; Zhang, B.(zhang@physics.unlv.edu) |
| 英文摘要 | Mergers of neutron stars are known to be associated with short gamma-ray bursts(1-4). If the neutron-star equation of state is sufficiently stiff (that is, the pressure increases sharply as the density increases), at least some such mergers will leave behind a supramassive or even a stable neutron star that spins rapidly with a strong magnetic field(5-8) (that is, a magnetar). Such a magnetar signature may have been observed in the form of the X-ray plateau that follows up to half of observed short gamma-ray bursts(9,10). However, it has been expected that some X-ray transients powered by binary neutron-star mergers may not be associated with a short gamma-ray burst(11,12). A fast X-ray transient (CDF-S XT1) was recently found to be associated with a faint host galaxy, the redshift of which is unknown(13). Its X-ray and host-galaxy properties allow several possible explanations including a short gamma-ray burst seen off-axis, a low-luminosity gamma-ray burst at high redshift, or a tidal disruption event involving an intermediate-mass black hole and a white dwarf(13). Here we report a second X-ray transient, CDF-S XT2, that is associated with a galaxy at redshift z = 0.738 (ref.(14)). The measured light curve is fully consistent with the X-ray transient being powered by a millisecond magnetar. More intriguingly, CDF-S XT2 lies in the outskirts of its star-forming host galaxy with a moderate offset from the galaxy centre, as short gamma-ray bursts often do(15,16). The estimated event-rate density of similar X-ray transients, when corrected to the local value, is consistent with the event-rate density of binary neutron-star mergers that is robustly inferred from the detection of the gravitational-wave event GW170817. |
| WOS关键词 | EXTENDED EMISSION ; TIDAL DISRUPTION ; ENERGY INJECTION ; EVOLUTION ; AFTERGLOW ; BURSTS ; FLARES ; MODEL ; BIRTH |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 出版者 | NATURE PUBLISHING GROUP |
| WOS记录号 | WOS:000464412700041 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/24490]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Xue, Y. Q.; Zheng, X. C.; Zhang, B. |
| 作者单位 | 1.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei, Anhui, Peoples R China 2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei, Anhui, Peoples R China 3.Leiden Univ, Leiden Observ, Leiden, Netherlands 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing, Peoples R China 5.Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA 6.Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA 7.Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA 8.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA 9.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 10.Peking Univ, Sch Phys, Dept Astron, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue, Y. Q.,Zheng, X. C.,Li, Y.,et al. A magnetar-powered X-ray transient as the aftermath of a binary neutron-star merger[J]. NATURE,2019,568(7751):198-+. |
| APA | Xue, Y. Q..,Zheng, X. C..,Li, Y..,Brandt, W. N..,Zhang, B..,...&Vito, F..(2019).A magnetar-powered X-ray transient as the aftermath of a binary neutron-star merger.NATURE,568(7751),198-+. |
| MLA | Xue, Y. Q.,et al."A magnetar-powered X-ray transient as the aftermath of a binary neutron-star merger".NATURE 568.7751(2019):198-+. |
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