Abstract Details

Name: Jayaram Chengalur
Affiliation: NCRA-TIFR
Conference ID: ASI2020_468
Title : Evolution of the gas content of galaxies
Authors and Co-Authors : -
Abstract Type :
Abstract Category : Plenary
Abstract : Understanding the evolution of the gaseous content of galaxies is critical to a full understanding galaxy evolution. Gas in galaxies is primarily hydrogen, which can be detected via its radio emission. Atomic hydrogen emits a spectral line at a wavelength of 21cm - this can be observed using radio telescopes like the GMRT. Unfortunately however this line is very weak, and it is extremely challenging to detect the hydrogen emission from distant galaxies. Indeed the problem of detecting hydrogen gas from distant galaxies was one of the original motivations behind the earliest proposals for a large radio telescope with a collecting area of about a square kilometre. In this I will review this problem and also give an update on the very encouraging progress that has been possible thanks to the capabilities of the upgraded Giant Meter Telescope (uGMRT).