Cosmology seminar: Lluis Mas Ribas

Lluis Mas Ribas is a PhD student in ITA

Unraveling the faintest radiation sources in the Universe

Low-luminosity galaxies account for an increasingly large fraction of the overall galaxy population towards high-redshift, as indicated by the steepening of the faint-end slope of the rest-frame UV luminosity function. Direct studies of these faint galaxies at high-redshift are extremely challenging. In this talk I will present new methods to predict their abundance and, possibly, even their contribution to the ionizing background, using extended line emission around more massive/luminous galaxies and cross-correlations with other cosmic density tracers. I will also discuss the detectability of the faint emission line halos with future facilities such as the James Webb Space Telescope.


Benjamin Racine and Bridget Falck
Published Sep. 26, 2016 11:37 PM - Last modified Oct. 7, 2016 1:25 PM