Astronomy and Astrophysics Seminars

Discovery of the hottest component of the circumgalactic medium of the Milky Way with non-solar abundance ratios

by Prof. Smita Mathur (Ohio State University, USA)

Thursday, July 18, 2019 from to (Asia/Kolkata)
at DAA SEMINAR ( A269 )
The circumgalactic medium serves as an interface between the         galactic stellar disk and the intergalactic medium. It contains the largest baryon reservoir, and is believed to regulate the star-formation in a galaxies. As such, the curcumgalactic medium (CGM) is a very important component of a galaxy, so determining its physical conditions has been an active field of research. I'll review our work in the past few years and present new results. Using a deep XMM-Newton spectrum we have discovered the hottest component of the CGM. We also found non-solar abundance ratios of metals. Theoretical models of galaxy evolution and feedback must reproduce these properties of the CGM.