AR-2020-21

274 33 rd ANNUAL REPORT 2020-21 School of Physical Sciences, Swami Ramanand Theerth Marathwada University, Nanded (Coordinator: Madhav K. Patil) Areas of Research · AGN Feedback in Galaxy Clusters · Soft X-ray Excess Emission from Type 1 AGNs · Correlation between X-ray vs Optical/UV Variability of AGNs · X-ray Binary Sources (XRBs) · Dust Extinction and Multiphase ISM in Early-type Galaxies Researchers at SRTMU are involved in investigating and quantifying the power injected by the radio jets into the ICM by measuring pdV work of the cavities, and checking their balance with that quantified by studying radio jets. This study involves analysis of high resolution X-ray data from Chandra X-ray Telescope and multi-frequency radio data acquired using uGMRT. Collaborators in this study are Somak Raychaudhary (IUCAA), DharamV. Lal (GMRT), Ishwar Chandra (NCRA), and Sachindra Naik (PRL). Systematic study using the most advanced observing facilities like, Chandra and XMM-Newton, has shown that the soft excess emission is a smooth continuum component rather than a blend of emission/absorption features. I t is obvious that there must be a coupling between the disk and corona emission. Researchers from SRTMU , with Ranjeev Misra and Gulab C . Dewangan (both from IUCAA) , using the simultaneous observing capabilities at Optical/UV and X - ray wavelengths of the space-born telescopes like AstroSat, XMM-Newton , and Swift are involved in investigating the inter-band variability properties ofAGN. ICARD – SRTMU is involved in the study of XRB population in star forming galaxies. This study is based on the X-ray data acquired using the LAXPC onboard of AstroSat, and is carried in collaboration with RanjeevMisra andGulab C. Dewangan. The School is also involved in the study of multiphase ISM in early-type galaxies in collaboration with S. K. Pandey (PRSU, Raipur). This study is based on multi-frequency observations of early-type galaxies selected fromdifferent environments .