| Name: Labani Mallick |
| Affiliation: University of Manitoba & CITA, University of Toronto, Canada |
| Conference ID: ASI2026_609 |
| Title: Constraining Disk-to-Corona Power Transfer Fraction, Soft X-ray Excess Origin, and Black Hole Spin Population of Type-1 AGN |
| Abstract Type: Invited |
| Abstract Category: High Energy Phenomena, Fundamental Physics and Astronomy |
| Author(s) and Co-Author(s) with Affiliation: Labani Mallick(University of Manitoba & CITA, University of Toronto, Canada) |
| Abstract: Unveiling the nature of the accretion disk, its interaction with the X-ray corona, and assessing black hole spin demographics are some open challenges in astrophysics. To address these issues, we systematically modeled broadband X-ray spectra of a sample of Type-1 active galactic nuclei (AGN) across mass scales. In this talk, I will present the key results from our spectral modeling, discuss the implications of relativistic disk reflection and warm Comptonization for the origin of the soft X-ray excess, predictions of the standard alpha-disk model, and how we can compute the disk-to-corona power transfer fraction in accreting objects. I will also discuss how detailed measurements of the reflected X-rays from the accretion disk can be utilized to probe the innermost regions of accretion flow just outside the event horizon and determine one of the fundamental parameters, the spin of the central black hole, across mass scales in AGN.
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