Astrophysics Brown Bag Lunch Talk (speaker: Paul Torrey, CfA)

Monday November 25, 2013 12:05 pm
Marlar Lounge (37-252)

Populating the Hubble Sequence in Cosmological Simulations

Cosmological simulations are among the most powerful tools available to probe the non-linear regime of cosmic structure formation. They also provide one of the most powerful testbeds for understanding the impact that feedback processes have on the evolution of galaxies. In my talk, I will present new galaxy formation simulations that couple a powerful computational approach with explicit baryon feedback prescriptions. This results in galaxy formation models that reproduce a wide range of observational constraints including the galaxy stellar mass function, cosmic star formation rate, and galaxy morphological diversity. I will discuss the numerical methods that we’ve employed, how they vary from traditional methods, and why this matters to our understanding of galaxy formation. Finally, I will discuss our efforts to increase the usability of our models by observers by coupling our simulations with stellar populations synthesis models. This allows us to produce simulated galaxy image catalogs which can be used to select galaxy populations with observational techniques and identify the past formation history or subsequent evolution of these galaxy populations.

Host: Rob Simcoe