Insight-HXMT, NuSTAR, and INTEGRAL Data Show Disk Truncation in the Hard State of the Black Hole X-Ray Binary MAXI J1820+070

被引：23
|
作者：
Zdziarski, Andrzej A. [1 ]
You, Bei [2 ,3 ]
Szanecki, Michal [4 ]
Li, Xiao-Bo [5 ]
Ge, Mingyu [5 ]
机构：
[1] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Bartycka 18, PL-00716 Warsaw, Poland
[2] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China
[3] Wuhan Univ, Astron Ctr, Wuhan 430072, Peoples R China
[4] Univ Lodz, Fac Phys & Appl Informat, Pomorska 149-153, PL-90236 Lodz, Poland
[5] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2022年 / 928卷 / 01期
关键词：
GAMMA-RAY; SPECTRAL STATES; XTE J1752-223; ACCRETION; CORONA; VARIABILITY; EVOLUTION; MODELS; FLOW; I;
D O I：
10.3847/1538-4357/ac54a7
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study X-ray and soft gamma-ray spectra from the hard state of the accreting black hole binary MAXI J1820+070. We perform an analysis of joint spectra from HXMT, NuSTAR, and INTEGRAL. We find an overall agreement between the spectra from all three satellites. Satisfactory fits to the data require substantial spectral complexity, with our models including two Comptonization regions and their associated disk reflection, a disk blackbody, and a narrow Fe K alpha line. Our fits confirm the presence of the truncation of the reflecting optically thick disk at least at >10 gravitational radii. However, we find that the HXMT data alone cannot significantly constrain the disk inner radii.
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页数：8
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