Insight-HXMT Observations of a Possible Fast Transition from the Jet- to Wind-dominated State during a Huge Flare of GRS 1915+105
文献类型：期刊论文
| 作者 | Kong, L. D.; Zhang, S.; Chen, Y. P.; Zhang, S. N.; Ji, L.; Wang, P. J.; Tao, L.; Ge, M. Y.; Liu, C. Z.; Song, L. M. |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021 |
| 卷号 | 906页码:L2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/2041-8213/abd03d |
| 英文摘要 | We present the analysis of the brightest flare that was recorded in the Insight-HMXT data set in a broad energy range (2-200 keV) from the microquasar GRS 1915+105 during an unusual low-luminosity state. This flare was detected by Insight-HXMT among a series of flares during 2019 June 2 UTC 16:37:06-20:11:36 with a 2-200 keV luminosity of 3.4-7.27 × 1038 erg s-1. Basing on the broadband spectral analysis, we find that the flare spectrum shows different behaviors during bright and faint epochs. The spectrum of the flare can be fitted with a model dominated by a power-law component. Additional components show up in the bright epoch with a hard tail and in the faint epoch with an absorption line of ∼6.78 keV. The reflection component of the latter is consistent with an inner disk radius ∼five times larger than that of the former. These results on the giant flare during the "unusual" low-luminosity state of GRS 1915+105 may suggest that the source experiences a possible fast transition from a jet-dominated state to a wind-dominated state. We speculate that the evolving accretion disk and the large-scale magnetic field may play important roles in this peculiar huge flare. |
| WOS记录号 | WOS:000605081000001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/289790]  |
| 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 | Kong, L. D.,Zhang, S.,Chen, Y. P.,et al. Insight-HXMT Observations of a Possible Fast Transition from the Jet- to Wind-dominated State during a Huge Flare of GRS 1915+105[J]. The Astrophysical Journal,2021,906:L2. |
| APA | Kong, L. D..,Zhang, S..,Chen, Y. P..,Zhang, S. N..,Ji, L..,...&Zhou, D. K..(2021).Insight-HXMT Observations of a Possible Fast Transition from the Jet- to Wind-dominated State during a Huge Flare of GRS 1915+105.The Astrophysical Journal,906,L2. |
| MLA | Kong, L. D.,et al."Insight-HXMT Observations of a Possible Fast Transition from the Jet- to Wind-dominated State during a Huge Flare of GRS 1915+105".The Astrophysical Journal 906(2021):L2. |
入库方式： OAI收割
来源：高能物理研究所
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