Abstract Details
| Name: Rohit Mandal Affiliation: Indian Institute of Space Science and Technology Conference ID: ASI2025_227 Title : Diffuse X-ray Emission Around Ultraluminous X-ray Sources: A Systematic Search Using Archival X-ray Data Authors and Co-Authors : Rohit Mandal 1, Andres Gurpide Lasheras 2, Samir Mandal 1 Abstract Type : Poster Abstract Category : High Energy Phenomena, Fundamental Physics and Astronomy Abstract : Accreting black holes (BHs) and neutron stars (NSs) in binary systems are among the universe's most powerful X-ray sources. Ultraluminous X-ray sources (ULXs), the most extreme version of these systems, exhibit X-ray luminosities 100–1,000 times brighter than standard X-ray binaries. At such high accretion rates, theoretical and numerical studies indicate powerful outflows, which have been detected either as outflowing gas or as large (~100 parsec) cavities blown into the surrounding medium. Most studies of these cavities have been conducted in optical and radio bands. However, the recent detection of diffuse X-ray emission around a ULX (Belfiore et al. 2020) demonstrates the potential of X-ray observations to probe these structures. Despite this, no systematic search for such cavities in the X-ray band has been conducted. In this study, to identify potential cavities or diffuse structures we are conducting a systematic search for extended X-ray emission around ULXs by comparing observations with realistic point spread function PSF simulations. In cases of detection, we are modeling the wind energetics and accretion history from the spectral and spatial data to provide new insights into ULX feedback mechanisms. For sources where no extended emission is detected, we place upper limits on the luminosity of the diffuse X-ray component. We are undertaking a systematic study to look for extended emission, by comparing observations with realistic PSF simulations. |