Surajit Mondal
Visiting Fellow
Email: surajit [at] ncra.tifr.res.in
Phone: +91 - 20 - 25719451
Extn: 9451
Office: F255
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: Solar and Ionospheric Physics
Biography:
Surajit obtained an Integrated M.Sc. degree in Physics from the Indian Institute of Technology (Kanpur), in 2015. Following this, he joined NCRA-TIFR for his doctoral studies; he is currently doing his doctoral research with Divya Oberoi.Research description:
My main interests lie in the areas of solar physics and radio interferometry. Till now I have primarily used low frequency radio data from the Murchison Widefield Array to study a variety of aspects of Sun ranging from very bright solar bursts, coronal mass ejections and the very quiet sun. I have developed an automated solar radio imaging pipeline which can produce images which have significantly higher dynamic ranges than similar images made using other instruments and analysis techniques during similar solar conditions. This has allowed us to explore the properties of very weak features which had been missed during earlier investigations. A prime example of this is our discovery of impulsive metrewave emissions from the quiet Sun. The flux densities of the impulsive emissions we have detected are about two orders of magnitude weaker than those detected earlier. Such faint emissions had been predicted to exist based on some theories of coronal heating. I am also leading an effort to further improve the imaging technique so that we can delve deeper into the mysteries of the Sun. This technique, if successful, can also potentially be used in general radio astronomy also. I have recently developed a keen interest in radio transients as well and is now actively involved into studying the relation between magnetars, superluminous supernovae and fast radio bursts.Selected publications:
1. Surajit Mondal, Divya Oberoi, Atul Mohan, “First radio evidence for impulsive heating contribution to the quiet solar corona”, 2020, ApJL, in press. 2. Surajit Mondal, Divya Oberoi, Angelos Vourlidas, “Estimation of the physical parameters of a CME at high coronal heights using low frequency radio observations”, 2020, ApJ, 893,28 3. Surajit Mondal, Atul Mohan, Divya Oberoi, et al., “Unsupervised Generation of High Dynamic Range Solar Images: A Novel Algorithm for Self-calibration of Interferometry Data”, 2019, ApJ, 875, 97 4. Atul Mohan, Surajit Mondal, Divya Obeori et al., “Evidence for Super-Alfvénic Oscillations in Solar Type III Radio Burst Sources”, 2019, ApJ, 875, 98 5. Shubhadeep Sadhukhan, Surajit Mondal & Sagar Chakraborty , “Stability of rotating self-gravitating filaments: effects of magnetic field”, 2016, MNRAS, 459, 2016 6. Surajit Mondal & Sagar Chakraborty, “Effect of a tide on the Parker-Jeans Instability”, 2015, MNRAS, 450, 1874.
BACK