Time-lag Between Disk and Corona Radiation Leads to Hysteresis Effect Observed in Black hole X-Ray Binary MAXI J1348-630
文献类型：期刊论文
| 作者 | Weng, Shan-Shan; Cai, Zhen-Yi; Zhang, Shuang-Nan; Zhang, Wei; Chen, Yu-Peng; Huang, Yue; Tao, Lian |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021 |
| 卷号 | 915页码:L15 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/2041-8213/ac0a7b |
| 英文摘要 | Accretion is an essential physical process in black hole X-ray binaries (BHXRBs) and active galactic nuclei. The properties of accretion flows and their radiation were originally considered to be uniquely determined by the mass accretion rate of the disk; however, the "hysteresis effect" observed during outbursts of nearly all BHXRBs seriously challenges this paradigm. The hysteresis effect referred to is that the hard-to-soft state transition in the fast-rise stage occurs at much higher luminosity than the soft-to-hard state transition in the slow-decay stage. That is, the same source can show different spectral/temporal properties at the same luminosity. Phenomenologically, this effect is also represented as the so-called "q"-shaped hardness-intensity diagram, which has been proposed as a unified scene for BHXRBs. However, there is still a lack of quantitative theoretical interpretation and observational understanding of the "q"-diagram. Here, we present a detailed time-lag analysis of a recently found BHXRB, MAXI J1348-630, intensively monitored by Insight-HXMT over a broad energy band (1-150 keV). We find the first observational evidence that the observed time-lag between radiations of the accretion disk and the corona leads naturally to the hysteresis effect and the "q"-diagram. Moreover, complemented by the quasi-simultaneous Swift data, we achieve a panorama of the accretion flow: the hard X-ray outburst from the corona heats and subsequently induces the optical brightening in the outer disk with nearly no lag; thereafter, the enhanced accretion in the outer disk propagates inward, generating the delayed soft X-ray outburst at the viscous timescale of ~8-12 days. |
| WOS记录号 | WOS:000668704000001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/289808]  |
| 专题 | 高能物理研究所_粒子天体物理中心 硬X射线调制望远镜卫星 |
| 推荐引用方式 GB/T 7714 | Weng, Shan-Shan,Cai, Zhen-Yi,Zhang, Shuang-Nan,et al. Time-lag Between Disk and Corona Radiation Leads to Hysteresis Effect Observed in Black hole X-Ray Binary MAXI J1348-630[J]. The Astrophysical Journal,2021,915:L15. |
| APA | Weng, Shan-Shan.,Cai, Zhen-Yi.,Zhang, Shuang-Nan.,Zhang, Wei.,Chen, Yu-Peng.,...&Tao, Lian.(2021).Time-lag Between Disk and Corona Radiation Leads to Hysteresis Effect Observed in Black hole X-Ray Binary MAXI J1348-630.The Astrophysical Journal,915,L15. |
| MLA | Weng, Shan-Shan,et al."Time-lag Between Disk and Corona Radiation Leads to Hysteresis Effect Observed in Black hole X-Ray Binary MAXI J1348-630".The Astrophysical Journal 915(2021):L15. |
入库方式： OAI收割
来源：高能物理研究所
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