Broadband Spectral Properties of MAXI J1348-630 using AstroSat Observations

作     者：Gitika Mall Jithesh Vadakkumthani Ranjeev Misra Gitika Mall;Jithesh Vadakkumthani;Ranjeev Misra

作者机构：Center for Field Theory and Particle Physics and Department of PhysicsFudan UniversityShanghai 200438China Department of Physics and ElectronicsCHRIST(Deemed to be University)Hosur Main RoadBengaluru 560029India Inter-University Centre for Astronomy and Astrophysics(IUCAA)PB No.4GaneshkhindPune 411007India 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2023年第23卷第1期

页      面：161-170页

核心收录：

学科分类：07[理学] 070402[理学-天体测量与天体力学] 0704[理学-天文学] 

基　　金：support from the China Scholarship Council(CSC),Grant No.2020GXZ016647 IUCAA Visitors Programme the Centre for Research,CHRIST(Deemed to be University) financial support in the form of a Seed Money Grant(SMSS-2217) 

主　　题：black hole physics-X-rays binaries-accretion-accretion disks-X-rays individual(MAXI J1348-630) 

摘      要：We present broadband X-ray spectral analysis of the black hole X-ray binary MAXI J1348-630,performed using five AstroSat *** source was in the soft spectral state for the first three observations and in the hard state for the last *** three soft state spectra were modeled using a relativistic thin accretion disk with reflection features and thermal *** fitting of the soft state spectra constrained the spin parameter of the black hole a_(*)0.97 and the disk inclination angle i=32.9_(-0.6)^(+4.1)*** bright and faint hard states had bolometric flux a factor of~6 and~10 less than that of the soft state *** spectra were fitted using the same model except that the inner disk radius was not assumed to be at the last stable ***,the estimated values do not indicate large truncation radii and the inferred accretion rate in the disk was an order of magnitude lower than that of the soft *** with earlier reported temporal analysis,AstroS at data provide a comprehensive picture of the evolution of the source.