IA/U.Lisboa Seminar - The Far-Infrared Properties of Optically-Selected Galaxies - 3 maio 2016

The Far-Infrared Properties of Optically-Selected Galaxies

Marco Viero

Stanford University

Resumo

Far-infrared/Submillimeter wavelengths provide a unique window into obscured star formation at high redshifts, with the full ensemble of dusty star-forming galaxies combining to make up the Cosmic Infrared Background (CIB). However, source confusion - a noise floor which is present in maps where the instrument resolution so large as to contain multiple sources - makes identifying individual sources and relating them to their optical counterparts incredibly challenging. Given these limitations, I will outline (relatively simple) methods designed to statistically make this connection, and I will present latest results from HerMES on the evolving infrared properties of optical/NIR-selected galaxies, and how these properties are intimately tied to their host galaxy stellar mass and redshift. I will show how the missing CIB fraction can be cleverly accounted for by considering how they bias the measurement. I will finish by presenting HeLMS and HerS, two Hershel surveys in the SDSS Stripe 82 which were designed to leverage the rich set of ancillary data in the stripe to better answer these and other exciting questions.

3 de maio de 2016 | 15:00

Local

IA/U.Lisboa