Physics Department Colloquia
Fall 2013 Schedule
Monday, November 18 Wiegand Room 5:00 - 6:00
All Grown Up: The growth of cosmic structure and the assembly of galaxies over cosmic time
Jeremy Murphy, Princeton University
Despite the wide diversity of galaxy morphologies, galaxies in both the local and high redshift universe obey a number of tight scaling relationships. These relationships between a galaxy's fundamental parameters such as mass, size, density, color and metallicity indicate a more methodical assembly process then what one might infer from looking at their apparent visual diversity. The cold dark matter model of the growth of cosmic structure gives us a framework on which to understand the hierarchical assembly of mass and the growth of galaxies. However, a number of conflicts with this model have come to light in the past decade. I will discuss what a galaxy is, how it grows over time, and how some of the recent conflicts between observations and theoretical models are being solved with better data and simulations.
If you have a disability and require a reasonable accommodation, please call Chris Weber at408-554-7869(voice) or1-800-735-2929(TTY-California Relay) at least 72 hours prior to the event.