D. J. Saikia

Senior Professor H
National Centre for Radio Astrophysics
Tata Institute of Fundamental Research
Savitribai Phule Pune University Campus,
Pune 411 007
Maharashtra, INDIA
Status: Retired

Main Research Areas: Extragalactic Radio Astronomy, AGNs and Nearby Galaxies.


D. J. Saikia did his schooling at St. Edmund's School, Shillong, and his B.Sc. (Physics Honours) from Hindu College, and M.Sc. (Physics) from Gwyer Hall, both institutions being part of the University of Delhi. He joined the radio astronomy group of TIFR after his M.Sc. and obtained his Ph.D. degree from what was then the University of Bombay, working largely with Vijay Kapahi and Govind Swarup on radio jets and compact features in radio galaxies and quasars, including the development of an early version of the unified scheme for different kinds of quasars, which later developed into an active area of research. He has since worked in a number of Observatories and Universities across the world, and has been a faculty member of NCRA-TIFR since 1977. He is currently on leave, acting as the first Vice Chancellor of Cotton College State University, Assam.

Research description:

D. J. Saikia's primary research interests continue to be diverse aspects of active galaxies, ranging from the nearby mildly active galaxies to the luminous radio galaxies and quasars at high redshifts, probing the early Universe from deep radio continuum surveys, neutral hydrogen 21-cm absorbers in active galaxies and at cosmological distances. He is the Editor of the Bulletin of the Astronomical Society of India (BASI), a quarterly journal published by the Astronomical Society of India (ASI), and Series Editor of the ASI Conference Series. At present, his thoughts and energies are almost entirely focussed on building a strong foundation for Cotton College State University as an institution with a vibrant academic and egalitarian atmosphere, excelling in all forms of academic activity, while providing high-quality, broad-based holistic education to the University students, and upholding the highest standards of ethics and public accountability.

Selected publications:

1. Associated 21-cm absorption towards the cores of radio galaxies (Y. Chandola, N. Gupta, & D. J. Saikia 2013, MNRAS, 429, 2380)

2. The Discovery of Host Galaxy H I Absorption in CTA 21 (C. J. Salter, D. J. Saikia et al. 2010, ApJL, 715, L117)

3. 4C02.27: a quasar with episodic activity? (M. Jamrozy, D. J. Saikia, & C. Konar 2009, MNRAS, 399, L141)

4. Deep low-frequency observations with the Giant Metrewave Radio Telescope: a search for relic radio emission (S. K. Sirothia, D. J. Saikia et al. 2009, MNRAS, 392, 1403)

5. HI gas in rejuvenated radio galaxies: Giant Metrewave Radio Telescope observations of the DDRG J1247+6723 (D. J. Saikia, N. Gupta, & C. Konar 2007, MNRAS, 375, L31)

6. Radio bubbles in the composite AGN-starburst galaxy NGC6764 (A. Hota & D. J. Saikia 2006, MNRAS, 371, 945)

7. Associated 21-cm HI absorption towards the radio galaxy 3C452 (J2245+3941) (N. Gupta & D. J. Saikia 2006, MNRAS, 370, L80)

8. J0041+3224: a new double-double radio galaxy (D. J. Saikia, C. Konar, & V. K. Kulkarni 2006, MNRAS, 366, 1391)

9. Radio sources at low Galactic latitudes (D. J. Saikia et al. 2004, MNRAS, 354, 827)

10. Polarization asymmetry in CSS sources: Evidence of AGN fuel? (D. J. Saikia & N. Gupta 2003, A&A, 405, 499)