演講資訊

摘要：

Multiband observation of deep fields provides a unique scope to study different aspects of galaxy evolution by effectively detecting fainter sources in the distant universe. We utilize the angular resolution (~1.2 arcsec), sensitivity, and field of view of the Ultra-Violet Imaging Telescope (UVIT) onboard AstroSat to image several HST deep fields in the FUV and NUV bands. Our UV flux measurements of the identified sources complement existing multiband data in deep fields and enable us to probe properties of galaxies between redshift ~ 0 and 1. We studied the galaxy UV luminosity function, UV continuum slope ($\beta$), and IRX-$\beta$ relation to understand galaxy evolution during the last 6 Gyr cosmic time. I will specifically discuss the nature of dust attenuation studied using a UV-selected galaxy sample at $z\sim$0.5 in the GOODS-north field. I will also discuss how observation of AstroSat UV deep field is unique to search for Lyman Continuum leaking galaxies beyond redshift ~ 1, which is important to understand the cosmic reionization process.