Séminaire Rahna Payyasseri Thanduparackal

Abstract

Circum-Galactic Medium (CGM) is the gas surrounding galaxies outside their disks and inside their virial radii. Lyman-alpha (Lyα) emission is one of the most important spectral features for probing the CGM at high redshifts, providing crucial insights into the formation and evolution of galaxies and their environments in the early Universe. I will present a study of extended Lyα emission around quasars at z>2 utilizing the capabilities of the J-PAS survey, and highlight our recent discovery of a massive Lyα nebula.