A Possible 250 s X-Ray Quasi-periodicity in the Fast Blue Optical Transient AT2018cow
文献类型：期刊论文
| 作者 | Zhang, WJ; Shu, XW; Chen, JH ; Sun, LM; Shen, RF; Tao, L; Chen, C; Jiang, N; Dou, LM; Qin, Y
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2022 |
| 卷号 | 22期号:12页码:125016 |
| ISSN号 | 1674-4527 |
| 关键词 | black hole physics X-rays: individual (AT2018cow) X-rays: bursts |
| DOI | 10.1088/1674-4527/ac9c4b |
| 文献子类 | Article |
| 英文摘要 | The fast blue optical transients (FBOTs) are a new population of extragalactic transients of unclear physical origin. A variety of mechanisms has been proposed including failed supernova explosion, shock interaction with a dense medium, young magnetar, accretion onto a compact object and stellar tidal disruption event, but none is conclusive. Here we report the discovery of a possible X-ray quasi-periodicity signal with a period of similar to 250 s (at a significance level of 99.76%) in the brightest FBOT AT2018cow through the analysis of XMM-Newton/PN data. The signal is independently detected at the same frequency in the average power density spectrum from data taken from the Swift telescope, with observations covering from 6 to 37 days after the optical discovery, though the significance level is lower (94.26%). This suggests that the quasi-periodic oscillation (QPO) frequency may be stable over at least 1.1 x 10(4) cycles. Assuming the similar to 250 s QPO to be a scaled-down analog of that typically seen in stellar mass black holes, a black hole mass of similar to 10(3)-10(5) solar masses could be inferred. The overall X-ray luminosity evolution could be modeled with a stellar tidal disruption by a black hole of similar to 10(4) solar masses, providing a viable mechanism to produce AT2018cow. Our findings suggest that other bright FBOTs may also harbor intermediate-mass black holes. |
| 电子版国际标准刊号 | 2397-6209 |
| 语种 | 英语 |
| WOS记录号 | WOS:000897966800001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/300304]  |
| 专题 | 高能物理研究所_粒子天体物理中心 高能物理研究所_实验物理中心 高能物理研究所_加速器中心 硬X射线调制望远镜卫星 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhang, WJ,Shu, XW,Chen, JH,et al. A Possible 250 s X-Ray Quasi-periodicity in the Fast Blue Optical Transient AT2018cow[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2022,22(12):125016. |
| APA | Zhang, WJ.,Shu, XW.,Chen, JH.,Sun, LM.,Shen, RF.,...&Wang, TG.(2022).A Possible 250 s X-Ray Quasi-periodicity in the Fast Blue Optical Transient AT2018cow.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,22(12),125016. |
| MLA | Zhang, WJ,et al."A Possible 250 s X-Ray Quasi-periodicity in the Fast Blue Optical Transient AT2018cow".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 22.12(2022):125016. |
入库方式： OAI收割
来源：高能物理研究所
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