My research interests range from solar physics to black hole accretion, within the overall framework of plasma astrophysics. They include black hole accretion disks, AGN and microquasar jets and radiation processes, solar radio emission, solar coronal mass ejections (CMEs) and space weather. I use a combination of semi-analytical theory and analysis of data from ground and space-based instruments.
Please click here for my research publications.
Please click here for a poster describing the research activities of our group.
Please click here for a general-purpose article on solar coronal mass ejections that I wrote in 2003, for Khagol, the quarterly bulletin of IUCAA.
I am interested in the dynamics and basic energetics of solar CMEs and in the manner in which their effects are manifested in the near-Earth space environment. The physics of radio emission from the solar corona and the scattering of radiation due to turbulence in the solar corona also interest me. These studies are carried out using theoretical tools as well as data from the LASCO coronograph aboard the SOHO satellite, the Giant Metrewave Radio Telescope (GMRT) and the GRAPES-3 cosmic ray telescope.
I am also interested in the microphysics of the mechanisms leading to viscosity in hot accretion disks around astrophysical black holes. A related area is in the manner in which relativistic jets are launched from the vicinity of such accretion disks. Recent results on rapid variability of multi TeV emission from nearby blazars raise interesting questions regarding the emission mechanisms, and consequently on the basic constituents of their jets.
The Plasma Astrophysics group at IISER Pune currently comprises myself, PhD students Debesh Bhattacharjee, Tomin James and Mayur Shende.
Arun Babu got his PhD in 2014 and moved on to a postdoc position at the Tata Institute of Fundamental Research, Mumbai. Following this, he has taken up a position with the Institute of Geophysics at the National Autonomous University of Mexico (UNAM).
Madhusudan Ingale defended his PhD thesis in April 2016 and moved to a postdoctoral position at the Physical Research Lab, Ahmedabad.
Nishtha Sachdeva defended her PhD thesis in the summer of 2018 and has taken up a postdoctoral position at the University of Michigan, Ann Arbor.