Name: Yashpal Bhulla
Affiliation: IUCAA
Conference ID : ASI2022_491
Title : The view of Thermonuclear X-Ray Bursts by the AstroSat
Authors : Yashpal Bhulla, Jayashree Roy, Ranjeev Misra
Abstract Type: Poster*
Abstract Category : Extragalactic Astronomy
Abstract : We report the detection of thermonuclear X-ray bursts from AstroSat/SXT-LAXPC instruments. It is observed that the bursts have an instant rise and exponentially decay, which causes nucleosynthesis phenomena from the surface of Neutron stars. We analyzed the time-resolved spectroscopy to extract the spectral features of bursts. To start with, the assumptions that the persistent flux remains the same throughout the bursts, we performed the classical approach to evaluate the black-body temperature and flux in each segment. Further, we modeled the constant along with the classical approach and found the scaling factor varied with flux during the bursts. The scaling parameters indicate the variability in persistent emission. At the peak of bursts, the scaling value is much immense, which represents the mass accretion rate is sudden increases during the rising of the bursts. We find the flux ratio (ratio of black body flux to total flux) to understand the region of bursts. For this approach, we added the thermal comptonization model in the previous component and express the emission may be reprocessed from the disk or corona of the neutron stars.