Yogesh Wadadekar

Associate Professor - G
Email: yogesh [at] ncra.tifr.res.in
Phone: +91 - 20 - 25719238
Extn: 9238
Office: F215
National Centre for Radio Astrophysics
Tata Institute of Fundamental Research
Savitribai Phule Pune University Campus,
Pune 411 007
Maharashtra, INDIA

Main Research Areas: Galaxy formation and evolution; radio properties of AGN and normal galaxies; High redshift radio galaxies; machine learning methods; SKA Telescope monitoring and control system architecture.


Yogesh Wadadekar did his B. Tech. (Metallurgical Engg.) from IIT-Bombay. In 1994, he joined IUCAA for his Ph.D. In 2000, he finished his Phd on the optical and radio properties of faint radio sources. He then went to the Institut d'Astrophysique de Paris as a postdoctoral fellow in 2001 and later moved to the Space Telescope Science Institute in Baltimore, USA in 2003. During 2006-07, he worked at the Dept. of Astrophysical Sciences, Princeton University, as the Astronomical Software Scientist for the Sloan Digital Sky Survey. Yogesh joined the National Centre for Radio Astrophysics in October 2007 and is now a Reader.

Research description:

Galaxy formation and evolution:
How galaxies form and evolve over the whole of cosmic history is a broad and active area of research in astrophysics. The detailed physics is very complicated due to the complex interactions of stars, dust, gas and dark matter. Over the decades, detailed analytic and numerical modeling has made a number of predictions that can be tested with observations. I use data from large surveys in the ultraviolet, optical, infrared and radio bands to observationally test some of the predictions of galaxy models.
Radio properties of AGN and normal galaxies:
Most of the bright radio sources in the sky are Active Galactic Nuclei - supermassive black holes at the centers of galaxies that are driving radio jets which interact with the medium to produce radio lobes. Understanding the phenemonology of these sources has been a long standing research interest of mine and I have used both large area surveys with the VLA as well as deeper, smaller area surveys with the GMRT to characterise and understand these sources. Normal galaxies are radio quiet but not radio silent. By stacking together radio images of thousands of galaxies, it becomes possible to investigate the evolution of radio emission from such galaxies over the last 7 billion years. This is an active area of research for me.
SKA Telescope monitoring and control system architecture:
350 engineers and astronomers from 11 countries are now coming together to design the next generation radio telescope - the Square Kilometer Array. The NCRA is leading the design work in an important area- the control and monitoring system for the SKA. I work as the Project Scientist for a 7 nation consortium that has recently started work on the engineering design of this system.

Selected publications:

1. J021659-044920: a relic giant radio galaxy at z ~ 1.3 (Tamhane, Wadadekar et al 2015, MNRAS, 453, 2438)

2. Radio-Far Infrared correlation in blue cloud galaxies with 0 < z < 1.2 (Basu, Wadadekar et al 2015, ApJ, 803, 51)

3. Luminosity-dependent star formation history of S0 galaxies: evidence from GALEX-SDSS-2MASS-WISE colours (Barway, Wadadekar et al. 2013, MNRAS, 432, 430)

4. Bar fraction in lenticular galaxies: dependence on luminosity and environment (Barway, Wadadekar et al. 2011, MNRAS, 410, L18)

5. PYMORPH: automated galaxy structural parameter estimation using PYTHON (Vikram, Wadadekar et al. 2010, MNRAS, 409, 1379)

6. Near-infrared bulge-disc correlations of lenticular galaxies (Barway, Wadadekar et al. 2009, MNRAS, 39, 1991)

7. Faint U-Band Dropouts in the WFPC2 Parallels of the Hubble Ultra Deep Field (Wadadekar et al. 2006, AJ, 132, 1023)

8. The WFPC2 Archival Pure Parallels Project (Wadadekar et al. 2006, PASP, 118, 450)

9. Estimating Photometric Redshifts Using Support Vector Machines (Wadadekar 2005, PASP, 117, 79)

10. Correlations among Global Photometric Properties of Disk Galaxies (Khosroshahi, Wadadekar et al. 2000, ApJ, 533, 162 )