Extragalactic Deep Fields
(C. H. Ishwara-Chandra, Nissim Kanekar, Y. Wadadekar, Jayaram N. Chengalur, Balpreet Kaur, Former members: Apurba Bera, Aditya Chowdhury, Sandeep K. Sirothia)
An important area of astronomical research in recent years has been the use of deep multi-wavelength studies of specific extragalactic fields to study in detail how galaxies and their stars and gas evolve through the age of the Universe. Radio and infrared imaging is especially important in this area, because most actively star-forming galaxies are obscured by dust and are hence not visible in optical images. Researchers at NCRA-TIFR use deep radio images of such extra-galactic fields to address a number of issues, including quantifying the number of sources of different types as a function of source luminosity and redshift, finding massive radio galaxies at high redshifts via their ultra-steep radio spectra, distinguishing between star-forming and active galaxies, etc.