Speaker
Description
Hydrogen emission lines provide powerful tracers of the gas that fuels star formation and shapes galaxy evolution. In this talk, I will present two complementary perspectives on galaxies in hydrogen light. First, I will discuss new J-PLUS Hα maps of nearby galaxies that reveal the distribution of ionized gas and ongoing star formation, offering insights into how feedback and environment regulate galactic ecosystems. I will then turn to the distant universe with J-PAS observations, highlighting our recent discovery of a massive, extended Lyman-α emission nebula, RaJav, that illuminates the circum-galactic medium around the quasar pairs at z=2.245.
Together, these projects demonstrate the potential of the J-PLUS and J-PAS surveys with their unique sets of 12 to 56 narrow-band filters and wide field of view to enable spatially resolved emission-line studies of galaxies across cosmic time
