Special Seminar

The Star Formation Main Sequence in the Illustris Simulation

Martin Sparre, PhD student, Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen,

NOTE UNUSUAL DAY - THURSDAY

The star formation main sequence is a tight relation between the star formation rate and the stellar mass of star-forming galaxies, which is established in a large number of observational works. In this talk I show that the galaxies in the Illustris hydrodynamical simulation follow such a relation, and that the relation is in excellent agreement with observations at z=0 and z=4. In between these redshifts, there are, however, small but significant disagreements between Illustris and real observations. I discuss the potential reasons for these disagreements, which could e.g. be IMF variation or the timescale over which expelled gas is reincorporated into galaxies. I also discuss the relation between star formation properties of galaxies and the growth of dark matter halos and find that most stars are formed in 10¹² solar mass halos at z<4.

Event Sponsors:

Theoretical AstroPhysics Including Relativity and Cosmology (TAPIR) - More events from this Sponsor

For more information, please contact JoAnn Boyd by phone at 4280 or by email at [email protected].