Broadband Spectral Properties of MAXI J1348-630 using AstroSat Observations
- Title
- Broadband Spectral Properties of MAXI J1348-630 using AstroSat Observations
- Creator
- Mall G.; Vadakkumthani J.; Misra R.
- Description
- We present broadband X-ray spectral analysis of the black hole X-ray binary MAXI J1348-630, performed using five AstroSat observations. The source was in the soft spectral state for the first three observations and in the hard state for the last two. The three soft state spectra were modeled using a relativistic thin accretion disk with reflection features and thermal Comptonization. Joint 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 degrees. The bright and faint hard states had bolometric flux a factor of ?6 and ?10 less than that of the soft state respectively. Their spectra were fitted using the same model except that the inner disk radius was not assumed to be at the last stable orbit. However, 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 state. Along with earlier reported temporal analysis, AstroSat data provide a comprehensive picture of the evolution of the source. 2022. National Astronomical Observatories, CAS and IOP Publishing Ltd.
- Source
- Research in Astronomy and Astrophysics, Vol-23, No. 1
- Date
- 2023-01-01
- Publisher
- Institute of Physics
- Subject
- accretion; accretion disks; black hole physics; X-rays: binaries; X-rays: individual (MAXI J1348-630)
- Coverage
- Mall G., Center for Field Theory and Particle Physics, Department of Physics, Fudan University, Shanghai, 200438, China; Vadakkumthani J., Department of Physics and Electronics, CHRIST (Deemed to be University), Hosur Main Road, Bengaluru, 560029, India; Misra R., Inter-University Centre for Astronomy and Astrophysics (IUCAA), PB No.4, Ganeshkhind, Pune, 411007, India
- Rights
- All Open Access; Green Open Access
- Relation
- ISSN: 16744527
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Mall G.; Vadakkumthani J.; Misra R., “Broadband Spectral Properties of MAXI J1348-630 using AstroSat Observations,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 27, 2025, https://archives.christuniversity.in/items/show/14698.