by
Michele Trenti(Institute of Astronomy, Cambridge University)
→
Europe/Stockholm
FB54
FB54
Description
The search for the agents of reionization is elusive: While it is well
established that the process is completed by redshift z~6 (and likely
already at z~8-10), the observed population of galaxies at z>6 appears
insufficient to even maintain the hydrogen ionized. Thus, the leading
hypothesis is that the majority of star formation during the first
billion years after the Big Bang was in elusive, low mass and very
faint galaxies. In this context, I will show how searches for both
bright and faint galaxies are needed to quantify accurately the galaxy
luminosity function and star formation at z>8. I will present results
on our search for the brightest of reionizing galaxies with the Hubble
BoRG survey, as well as discuss how we can use GRBs host galaxy
surveys at high-z to quantify star formation in faint dwarf galaxies
that are beyond the direct reach of Hubble.
