Agniva Roychowdhury
Post-Doctoral Fellow
Email: agniva [at] ncra.tifr.res.in
Phone: 02025719269
Extn: 9269
Office: F218B
National Centre for Radio Astrophysics
Tata Institute of Fundamental Research
Savitribai Phule Pune University Campus,
Pune 411 007
Maharashtra, INDIA
Tata Institute of Fundamental Research
Savitribai Phule Pune University Campus,
Pune 411 007
Maharashtra, INDIA
Main Research Areas: Astrophysical Jets, Black Holes, Radio Interferometry Theory, Gamma Ray Bursts, Reionization, Quantum Thermodynamics
Biography:
Agniva obtained his B.Sc. and M.Sc. in Physics from Presidency University, Kolkata, in 2016 and 2018, respectively, and his PhD in Physics (specialization : Astrophysics) from the University of Maryland, Baltimore, USA, in 2023. He was then a post-doctoral fellow at the Space Telescope Science Institute in Baltimore between 2023 and 2024, working on gamma ray bursts and cosmological reionization. He joined the National Centre for Radio Astrophysics as an open postdoctoral fellow in July 2025.Research description:
I have a wide range of research interests, ranging from observational astronomy to quantum thermodynamics. I believe that an interdisciplinary research structure, that takes the best of all possible worlds, can only take science further. The main focus of my current research goals involves understanding the nature of black holes using tools from all possible branches of physics. Specifically, I am interested in understanding outflows from accreting supermassive black holes (active galactic nuclei), using radio observations and numerical/analytical theory. When required, I employ multi-wavelength observations to probe supermassive black holes. A parallel focus has been the statistics of radio interferometric theory, which involves significant overlap between astronomy, mathematics, and statistics. I believe there is much more to harness in this regard, which should allow us to understand the radio universe better. My secondary research interests focus on the afterglows of gamma ray bursts (GRBs), which are highly exotic time-dependent objects, and cosmological reionization. I have been further involved in quantum and classical thermodynamics research, where I use the tools of mathematics to understand complex systems that operate far from equilibrium.Selected publications:
1. "A radio, optical, UV and X-ray view of the enigmatic changing look Active Galactic Nucleus 1ES 1927+654 from its pre- to post-flare states", S. Laha, E. T. Meyer, A. Roychowdhury, et al. 2022, The Astrophysical Journal, 931, 5. 2. "Proper Motions in the sub-kiloparsec Jet of 3C 78: Novel Constraints on the Physical Nature of Relativistic Jets", A. Roychowdhury, E. T. Meyer, M. Georganopoulos, & K. Kollmann 2024, Monthly Notices of the Royal Astronomical Society, 527, 10262. 3. "Time-rescaling of Dirac Dynamics: Shortcuts to Adiabaticity in Ion Traps and Weyl semimetals", A. Roychowdhury & S. Deffner 2021, Entropy, 23, 81.
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