Insight-HXMT Observations of a Possible Fast Transition from the Jet- to Wind-dominated State during a Huge Flare of GRS 1915+105
Kong,L. D.1,2; Zhang,S.1; Chen,Y. P.1; Zhang,S. N.1,2; Ji,L.3; Wang,P. J.1,2; Tao,L.1; Ge,M. Y.1; Liu,C. Z.1; Song,L. M.1,2; Lu,F. J.1; Qu,J. L.1,2; Li,T. P.1,2,4; Xu,Y. P.1; Cao,X. L.1; Chen,Y.1; Bu,Q. C.1; Cai,C.1; Chang,Z.1; Chen,G.1; Chen,L.5; Chen,T. X.1; Cui,W. W.1; Du,Y. Y.1; Gao,G. H.1,2; Gao,H.1,2; Gao,M.1; Gu,Y. D.1; Guan,J.1; Guo,C. C.1,2; Han,D. W.1; Huang,Y.1; Huo,J.1; Jia,S. M.1; Jiang,W. C.1; Jin,J.1; Li,B.1; Li,C. K.1; Li,G.1; Li,W.1; Li,X.1; Li,X. B.1; Li,X. F.1; Li,Z. W.1; Liang,X. H.1; Liao,J. Y.1; Liu,B. S.4; Liu,H. W.1; Liu,H. X.1; Liu,X. J.1; Lu,X. F.1; Luo,Q.1,2; Luo,T.1; Ma,R. C.1; Ma,X.1; Meng,B.1; Nang,Y.1,2; Nie,J. Y.1; Ou,G.1; Ren,X. Q.1,2; Sai,N.1,2; Song,X. Y.1; Sun,L.1; Tan,Y.1; Tuo,Y. L.1,2; Wang,C.2,6; Wang,L. J.5; Wang,W. S.1; Wang,Y. S.1; Wen,X. Y.1; Wu,B. B.1; Wu,B. Y.1,2; Wu,M.1; Xiao,G. C.1,2; Xiao,S.1,2; Xiong,S. L.1; Yang,R. J.7; Yang,S.1; Yang,Y. J.1; Yang,Y. J.1; Yi,Q. B.1,2; Yin,Q. Q.1; You,Y.1; Zhang,F.1; Zhang,H. M.1; Zhang,J.1; Zhang,P.1; Zhang,W. C.1; Zhang,W.1,2; Zhang,Y. F.1; Zhang,Y. H.1,2; Zhao,H. S.1; Zhao,X. F.1,2; Zheng,S. J.1; Zheng,Y. G.1,7; Zhou,D. K.1,2
Source PublicationThe Astrophysical Journal Letters
AbstractAbstract 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.
KeywordBlack holes X-ray binary stars Relativistic jets Accretion Magnetic fields
WOS IDIOP:2041-8205-906-1-abd03d
PublisherThe American Astronomical Society
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Document Type期刊论文
Corresponding AuthorKong,L. D.
Affiliation1.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People's Republic of China;,,
2.University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3.Institut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Eberhard Karls, Universit?t, Sand 1, D-72076 Tübingen, Germany
4.Department of Astronomy, Tsinghua University, Beijing 100084, People's Republic of China
5.Department of Astronomy, Beijing Normal University, Beijing 100088, People's Republic of China
6.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
7.College of Physics Sciences & Technology, Hebei University, No. 180 Wusi Dong Road, Lian Chi District, Baoding City, Hebei Province 071002, People's Republic of China
Recommended Citation
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 Letters,2021,906(1).
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 Letters,906(1).
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 Letters 906.1(2021).
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