Nirupam Roy, Assistant Professor, Dept. of Physics
Nirupam Roy (b. 1982) did his B.E. in Mechanical Engineering from the Bengal Engineering College before moving to the National Center for Radio Astrophysics (NCRA-TIFR, Pune) for M.Sc. and Ph.D. in Physics working on Astronomy and Astrophysics. Following that, he was a Jansky Fellow (2009 - '12) at the National Radio Astronomy Observatory, USA, and then a Humboldt Fellow (2013 - '15) at the Max Planck Institute for Radio Astronomy in Bonn. He was an Assistant Professor of the Dept. of Physics, Indian Institute of Technology, Kharagpur (2015 - '16), and is currently working as an Assistant Professor at the Indian Institute of Science, Bangalore. His main expertise is in the field of radio astronomy, and his research interests include study of (i) interstellar medium and star formation, (ii) Galactic novae, and (iii) observational cosmology.
Unnecessary Details:
➕ Education and Experiences
- 2003: B. E. in Mechanical Engg., Bengal Engineering College (D.U.)
- 2005: M. Sc. in Physics, NCRA-TIFR, TIFR (D.U.)
- 2009: Ph.D. in Physics (Astrophysics), NCRA-TIFR, TIFR (D.U.)
- 2009 - 2012: National Radio Astronomy Observatory, New Mexico, USA
- 2013 - 2015: Max-Planck-Institut fur Radioastronomie, Bonn, Germany
- 2015 - 2016: Assistant Professor, Dept. of Physics, IIT Kharagpur
- 2016 - : Assistant Professor, Dept. of Physics, IISc Bangalore
➕ Fellowships and Awards
- Max Planck India Partner Group grant, Max-Planck-Gesellschaft, 2019
- Infosys Foundation Young Investigator Award, IISc Bangalore, 2017
- Medal for Young Scientists, Indian National Science Academy, 2013
- Humboldt Fellowship, Alexander von Humboldt Foundation, 2013
- Jansky Fellowship, National Radio Astronomy Observatory, 2009
➕ Research Interests
➕ Properties of multiphase turbulent ISM
Studying the properties of the interstellar medium is an integral part of understanding star formation. We are using radio and other multiwavelength data to observationally constraint properties of the interstellar medium like its density, temperature and magnetic field in different phases by using various spectral line transition as well thermal and non-thermal continuum emission. As a part of this endeavour, we are also carrying out Galactic plane survey, THOR and GLOSTAR, with the Very Large Array Telescope in two different frequencies to get an unprecedented picture of the complex interstellar medium.
➕ Study of Galactic Novae with VLA and GMRT
In collaboration with the EVLA Nova Team and the GMRT Nova Group, we are observing all nearby Galactic Novae over a wide range of frequency in order to to model their lightcurve and, in turn, learn the properties of these transient sources. These observations are helping us to understand the details of the astrophysical accretion and ejection in stellar binaries, and providing important insights regarding the high energy gamma ray emission from these sources as well as regarding the connection of novae and supernovae of type Ia.
➕ Redshifted 21 cm emission from the Epoch of Reionization
The study of neutral hydrogen 21 cm emission from the Epoch of Reionization is a powerful tool to study the evolution of the early Universe. Upcoming and future radio telescopes like SKA will be able to detect this signal due to the enormous improvement of sensitivity. We are working at present to develop various theoretical models and analytical tools that will allow such observational studies in near future. In particular, we are developing novel techniques to detect this weak signal from radio interferometric data by efficiently avoiding and removing the contaminating galactic and extragalactic foregrounds.
➕ Undergrad and Graduate Students
➕ M.Sc. Students
Aneesh Baburaj
Arpit K Behera
Kaustubh Kamal
Rohit Dokara: Now grad student at MPIfR, Bonn
Abhijeet Anand: Now grad student at MPA, Garching
Debatri Chattopadhyay: Now grad student at CAS, Swinburne
Jyotirmoy Dey: Now Junior Research Fellow at IIST, Trivandrum
Saikat Das: Now grad student at RRI, Bangalorec
➕ Graduate Students
Atanu Koley
Prerana Biswas
Bhavesh Jaiswal
➕ Selected publications
CV and Complete list of publications: arXiv ADS Google Web of Science
- Detailed study of ELAIS N1 field with the uGMRT - II. Source properties and spectral variation of foreground power spectrum from 300-500 MHz observations, Chakraborty, Roy, Datta et al., 2019 (2019MNRAS.490..243C)
- A study of Kepler supernova remnant: angular power spectrum estimation from radio frequency data, Saha, Bharadwaj, Roy, Choudhuri and Chattopadhyay, 2019 (2019MNRAS.489.5866S)
- High velocity H I jet-like feature towards the SNR candidate G351.7-1.2, Veena, Vig, Roy and Roy, 2019 (2019MNRAS.488L..59V)
- Turbulent power spectrum in warm and cold neutral medium using the Galactic HI 21 cm emission, Choudhuri and Roy, 2019 (2019MNRAS.483.3437C)
- Estimating kinetic temperature from H I 21 cm absorption studies: correction for the turbulence broadening, Koley and Roy, 2019 (2019MNRAS.483..593K)
Contact Details:
D2 - 06, Department of Physics
Indian Institute of Science, Bangalore 560012, INDIA
Tel: +91 80 22932056 email: nroy[at]iisc[dot]ac[dot]in
Important Note:
Due to practical limitations, I am unable to take any short- or long-term project student, intern, summer student or students for any such temporary position. Due to high volume of emails with such requests, I may not be able to reply to all individuals. When there is possibility of any such position, it will be mentioned here. Currently, I can take Ph.D. students only through IISc JAP programme.