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Insight-HXMT observation on 4U 1608–52: Evolving spectral properties of a bright type-I X-ray burst

Authors :
Chen, Y.P.
Zhang, S.
Zhang, S.N.
Ji, L.
Kong, L.D.
Santangelo, A.
Qu, J.L.
Lu, F.J.
Li, T.P.
Song, L.M.
Xu, Y.P.
Cao, X.L.
Chen, Y.
Liu, C.Z.
Bu, Q.C.
Cai, C.
Chang, Z.
Chen, G.
Chen, L.
Chen, T.X.
Chen, Y.B.
Cui, W.
Cui, W.W.
Deng, J.K.
Dong, Y.W.
Du, Y.Y.
Fu, M.X.
Gao, G.H.
Gao, H.
Gao, M.
Ge, M.Y.
Gu, Y.D.
Guan, J.
Guo, C.C.
Han, D.W.
Huang, Y.
Huo, J.
Jia, S.M.
Jiang, L.H.
Jiang, W.C.
Jin, J.
Li, B.
Li, C.K.
Li, G.
Li, M.S.
Li, W.
Li, X.
Li, X.B.
Li, X.F.
Li, Y.G.
Li, Z.W.
Liang, X.H.
Liao, J.Y.
Liu, G.Q.
Liu, H.W.
Liu, X.J.
Liu, Y.N.
Lu, B.
Lu, X.F.
Luo, Q.
Luo, T.
Ma, X.
Meng, B.
Nang, Y.
Nie, J.Y.
Ou, G.
Ren, X.Q.
Sai, N.
Sun, L.
Tan, Y.
Tao, L.
Tuo, Y.L.
Wang, C.
Wang, G.F.
Wang, J.
Wang, W.S.
Wang, Y.S.
Wen, X.Y.
Wu, B.Y.
Wu, B.B.
Wu, M.
Xiao, G.C.
Xiao, S.
Xiong, S.L.
Yang, J.W.
Yang, S.
Yang, Y.J.
Yang, Y.J.
Yi, Q.B.
Yin, Q.Q.
You, Y.
Zhang, A.M.
Zhang, C.L.
Zhang, C.M.
Zhang, F.
Zhang, H.M.
Zhang, J.
Zhang, T.
Zhang, W.C.
Zhang, W.
Zhang, W.Z.
Zhang, Yi.
Zhang, Y.F.
Zhang, Y.J.
Zhang, Y.
Zhang, Z.
Zhang, Z.L.
Zhao, H.S.
Zhao, X.F.
Zheng, S.J.
Zhou, D.K.
Zhou, J.F.
Zhu, Y.
Zhu, Y.X.
Source :
Journal of High Energy Astrophysics; November 2019, Vol. 24 Issue: 1 p23-29, 7p
Publication Year :
2019

Abstract

The evidences for the influence of thermonuclear (type-I) X-ray bursts upon the surrounding environments in neutron star low-mass X-ray binaries (LMXB) were detected previously via spectral and timing analyses. Benefitting from a broad energy coverage of Insight-HXMT, we analyze one photospheric radius expansion (PRE) burst, and find an emission excess at soft X-rays. Our spectral analysis shows that, such an excess is not likely relevant to the disk reflection induced by the burst emission and can be attributed to an enhanced pre-burst/persistent emission. We find that the burst and enhanced persistent emissions sum up to exceed Eddington luminosity by ∼ 40 percentages. We speculate that the enhanced emission is from a region beyond the PRE radius, or through the Comptonization of the corona.

Details

Language :
English
ISSN :
22144048
Volume :
24
Issue :
1
Database :
Supplemental Index
Journal :
Journal of High Energy Astrophysics
Publication Type :
Periodical
Accession number :
ejs51153580
Full Text :
https://doi.org/10.1016/j.jheap.2019.09.001
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