Salmoli Ghosh
Research Scholar
Email: salmoli [at] ncra.tifr.res.in
Phone: 020-25719230
Extn: 9230
Office: G111
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: Radio emission from radio-quiet AGNs; Feedback in radio-quiet AGNs; Radio polarimetric calibration
Supervisor: Preeti Kharb
Biography:
Salmoli Ghosh obtained her B.Sc.(Hons.) degree in Physics from St. Xavier's College (Autonomous), Kolkata, under the University of Calcutta in 2019, and her M.Sc. degree in Physics from the Department of Physics and Astronomy, National Institute of Technology, Rourkela, in 2021. She joined the Ph.D. programme of NCRA-TIFR in October 2021. After completing the IUCAA-NCRA Graduate School, she joined Professor Preeti Kharb for her doctoral research, on a multi-scale and multi-wavelength study of Seyfert and LINER galaxies, using a sub-sample from the famous 12micron+CFA sample.Research description:
The active galactic nuclei (AGNs) population is dominated (>80%) by radio-quiet (RQ) AGNs with less powerful and short-scale radio jets in comparison to the radio-loud (RL) AGNs. Despite being classified as RQ AGNs, certain Seyferts and LINERs (>44%, with recent sensitive observations) exhibit noteworthy kpc-scale radio outflow (e.g., Gallimore et al. 2006), indicating complex dynamics within these systems. There is significant debate surrounding the source of radio emission in RQ AGNs, with the primary contenders being AGN jets (Colbert et al. 1996), and starburst superwinds (Baum et al. 1993). To understand the true origin of radio outflow in RQ AGNs, we aim to delve into various aspects of these galaxies, spanning from the base of their jets (close to their launching site) to kpc scales. By examining continuum characteristics, emission line properties, spectral energy distributions, polarisation properties, and jet/outflow kinematics, our goal is to uncover some of the mysteries surrounding RQ AGNs. Our ultimate goal is to understand the complex interplay between the radio outflows and the surrounding medium across different spatial scales. This endeavour is essential for shedding light on unanswered questions surrounding the 'AGN feedback' phenomenon in RQ AGNs from pc to kpc-scales.Selected publications:
1. S. Ghosh, P. Kharb, J. Baghel, and S. Silpa, “PG 1004+130: Hybrid Morphology Source or a Restarted FRII? A uGMRT Polarimetric Investigation”, 2023, The Astrophysical Journal, 958, 71.