Galaxy Formation: The Reionization Years

Michael Santos (Caltech)

2:30 pm Monday 13 January 2003

The reionization of hydrogen represents not only a landmark achievement by early luminous sources, but also had a considerable effect on the subsequent formation of stars and galaxies: reionization inhibits star formation in some proto-galaxies, in a way that depends on their total mass and formation history. I will show results suggesting that reionization plays a crucial role in understanding globular cluster formation. I will also present observations of z=5 galaxies, where the Lyman-alpha line luminosity function provides a test of the effect of reionization on star formation in proto-galaxies.