Relativistic, Magnetic and Dynamical Astrophysics
Principal Investigator : Arun Mangalam (Home page) Project duration : March 2019--October 2022
Over the past several decades or so, key and outstanding theoretical astrophysical problems have assumed interplay of several physical concepts in plasma physics, radiation transfer besides relativity and stellar dynamics. We project science cases of some of these problems that have the inherent complexity due to this interplay but applied to the cases of the Magneto-hydrodynamics (MHD) in the Sun; stellar, gas dynamics, hamiltonian mechanics and electrodynamics around black holes, structure and dynamics of galaxies. The predictions aim to make new advances in understanding variety of phenomena like magnetic topology and flare mechanisms, tidal disruption events around massive black holes and their observational appearance, quasi periodic oscillations observed in black hole systems besides cosmological formation of black holes. All the proposals are aimed at making predictions for current and future observations from various ground and space based telescopes that India is currently participating in such as ADITYA (studying solar atmosphere problems), ASTROSAT (black holes), TMT (black holes, galaxies and cosmology science cases), and LIGO (black holes).
Publications in the project period
1. "Open and closed magnetic configurations of twisted flux tubes", Sen, S., Mangalam, A., Astrophysical Journal, DOI: https://iopscience.iop.org/article/10.3847/1538-4357/ab141a .
2. Black hole demographics from TDE modeling. Mageshwaran, T., Mangalam, A., 2020, Proceedings of the International Astronomical Union, 14(S342), 260-262. DOI: https://doi.org/10.1017/S1743921318007305
3. Evolution of the M•-σ relation Bhattacharyya, D., Mangalam, A. , 2020, Proceedings of the International Astronomical Union, 14(S342), 254-256. DOI : https://doi.org/10.1017/S1743921318007251
4. Cosmic Spin and Mass Evolution of Black Holes and Its Impact, 2020 ApJ 895 130 Bhattacharyya, D., Mangalam, A. , 2020, ApJ 895, 130: https://iopscience.iop.org/article/10.3847/1538-4357/ab8869
- DST News, Jun 16th, 2020
5. Dynamics of accretion and winds in tidal disruption events, New Astronomy, 2021, 83, 101491, Mageshwaran, T., Mangalam, A., 2020, DOI 10.1016: https://doi.org/10.1016/j.newast.2020.101491.
- DST News, Aug 16th, 2020
6. A geometric origin for quasi-periodic oscillations in black hole X-ray binaries Prerna Rana, A. Mangalam, 2020, Accepted in the Astrophysical Journal.
7. A relativistic orbit model for temporal properties of AGN Prerna Rana, A. Mangalam, 2020, Galaxies 2020, 8(3), 67; DOI: https://doi.org/10.3390/galaxies8030067