|Speaker:||Matt Malkan (UCLA)|
|Title:||New Views of Galaxy Evolution: The Young and The Dusty|
|Date (JST):||Mon, Jul 08, 2013, 16:00 - 17:30|
|Place:||Seminar Room A|
Most methods for studying galaxies back across a large amount of cosmic time are based on the ultraviolet continuum emitted by their young stars. Although this has been a highly fruitful line of investigation, it has missed much of the overall big picture. At higher redshifts there is a large population of small, young galaxies, whose starlight is too faint to be noticed by traditional photometric selection. Although their stellar masses are still small, they are rapidly building them up with remarkably high rates of star formation. This allows us to find and study them using emission-line surveys. I will present new results on this population from narrow-band imaging with SuprimeCam, and from our slitless infrared spectroscopy survey we are making with HST.
The other missing side of galaxy evolution is the role of dust, which can absorb most of the UV emission, and re-radiate it in the infrared. I will present new measurements of these processes, using Akari, the South Pole Telescope, and ALMA.