Dr. Pramod Pawar

Executive Secretary:

Dr. Pramod Pawar (Postdoc, PhD Astrophysics, M.Sc. Physics, CSIR-NET, GATE, SET)

Citations – 267
h-index – 7
i10-index – 6

AD Scientific Index

Media Coverage 

Main Research Areas: 

Dr. Pramod Pawar focuses on X-ray astronomy, specifically on active galactic nuclei, ultra-luminous X-ray sources, and X-ray binaries. His main area of research involves investigating the immediate surroundings of supermassive black holes through X-ray spectroscopic and temporal variability studies. He conducts research using X-ray observations, and analyzes and models the data to interpret the results. Additionally, he has a strong interest in multiwavelength observational astrophysics.

Biography:

Pramod Pawar obtained an M.Sc. in Physics from the School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, in 2009. He completed his doctoral studies and obtained a Ph.D. in Physics at the same university in August 2017, after which he joined IUCAA, Pune as a post-doctoral fellow for 3 years.  He also qualified CSIR-NET, GATE, and SET exams. 

 

Research Description:

AGN Multiwavelength Variability

Exploring the Mechanisms behind Multiwavelength Variability in Active Galactic Nuclei (AGN)

Active Galactic Nuclei (AGN) are characterized by their intense and highly variable electromagnetic emission across a broad range of wavelengths, from radio to gamma-rays. This variability is thought to originate from the accretion disk and the innermost regions of the AGN, where the supermassive black hole resides. However, the precise mechanisms that drive this variability and the connection between the emission at different wavelengths remain poorly understood.

One of the key challenges in studying AGN variability is the lack of a comprehensive theoretical framework that can explain the observations across different wavelengths. Furthermore, the variability properties of AGN can be highly complex and non-linear, making it difficult to disentangle the underlying physical processes.

To address this problem, this research aims to investigate the mechanisms behind multiwavelength variability in AGN, with a focus on understanding the physical processes that drive the observed emission. Specifically, the research will explore the following questions:

  1. What are the properties of AGN variability across different wavelengths, and how are they correlated?
  2. What physical processes are responsible for the observed variability in AGN, and how do they relate to the accretion flow and the supermassive black hole?
  3. How do the variability properties of AGN vary with different types of AGN, such as radio-loud and radio-quiet AGN?

By addressing these questions, this research will contribute to our understanding of the fundamental physics of AGN and the mechanisms that govern their variability. This knowledge can have implications for our understanding of the role of AGN in galaxy formation and evolution, as well as for the interpretation of multiwavelength observations of AGN in the era of upcoming facilities such as the Vera C. Rubin Observatory and the Cherenkov Telescope Array.

Selected Publications:

  1. Strong Soft X-Ray Excess in 2015 XMM-Newton Observations of BL Lac OJ 287 (M Pal, P Kushwaha, G C Dewangan, P K Pawar, 2020, ApJ, 890, 47) arXiv  Published
  2. Merging cold front and AGN feedback in the peculiar galaxy cluster Abell 2626 (S K Kadam, S S Sonkamble et al., 2019, MNRAS, 484, 4113) arXiv  Published
  3. UV to X-ray Comptonization delay in Mrk 493 (O Adegoke, G C Dewangan, P K Pawar, M Pal, 2019, ApJ Letters, 870, L13) arXiv  Published
  4. Complex UV/X-ray variability of 1H 0707-495 (P K Pawar, G C Dewangan, I E Papadakis, M K Patil, M Pal, AK Kembhavi, 2017, MNRAS, 472, 2823P) arXiv  Published
  5. The cadmium zinc telluride imager on AstroSat (V Bhalerao, D Bhattacharya, A Vibhute, P Pawar, A R Rao, M K Hingar, et al. 2017, JApA, 38, 31B) arXiv  Published
  6. AstroSat CZT Imager Observations of GRB 151006A: Timing, Spectroscopy, and Polarization Study (A R Rao, V Chand, M K Hingar, S Iyyani, R Khanna, A P K Kutty, J P Malkar, et al. 2016, ApJ, 833, 86) arXiv  Published
  7. On the reality of broad iron L lines from the narrow line Seyfert 1 galaxies 1H0707–495 and IRAS 13224-3809 (P K Pawar, G C Dewangan, M K Patil, R Misra, S K Jogadand, 2016. RAA, 16, 169) arXiv  Published
  8. X-ray/UV variability and the origin of soft X-ray excess emission from II Zw 177  (M Pal, G C Dewangan, R Misra, P K Pawar, 2016, MNRAS, 457, 875) arXiv  Published
  9. Constraining distance and inclination angle of V4641 SGR using SWIFT and NuSTAR Observations during low soft spectral state (M Pahari, R Misra, G C Dewangan, P Pawar, 2015, ApJ, 814, 158) arXiv  Published
  10. X-ray cavities and temperature jumps in the environment of the strong cool core cluster Abell 2390 (S S Sonkamble, N D Vagshette, P K Pawar, M K Patil, 2015, Ap&SS, 359, 61) arXiv  Published
  11. Hard X-ray polarimetry with Astrosat-CZTI (S V Vadawale, T Chattopadhyay, A R Rao, D Bhattacharya, V B Bhalerao et al. 2015, A&A, 578, A73)  Published

 

 

 

 

Last Updated on March 22, 2023 by Sonkamble Satish