Galaxies as star factories - from gas to stars

TYPEAstrophysics Seminar
Speaker:Raanan Nordon
Organizer:Hagai Perets
Time:14:30 - 15:30
Location:Lidow 620
Abstract:Galaxies turn their gas and dust content into stars. The gas content of
galaxies is a key parameter in understanding star formation in the
context of galaxy evolution. However, direct gas mass measurements via
CO emission lines are both difficult and controversial, in particular at
z>1. Researchers often resort to indirect methods of deriving gas
content and star formation efficiencies and find very gas reach galaxies
at z>1, that are inefficient at producing stars. I will discuss the
current "common knowledge" regarding the gas content of galaxies and the
star formation efficiencies, how these evolve with cosmological time,
and some of the controversy.