TAPIR Seminar

Too-big-to-fail in the Local Group: A Challenge for LCDM

Shea Garrison-Kimmel, Graduate Student, Department of Physics and Astronomy, Center for Cosmology, U.C. Irvine,

Studies of the Milky Way (MW) and Andromeda (M31) galaxies, along with their associated satellites and nearby dwarf galaxies, have proven immensely useful for constraining the cosmology of the Universe, due largely to the many disagreements between observations and high-resolution simulations, such as the too-big-to-fail (TBTF) problem. I will present a number of simulations, many of which are a part of the ELVIS Suite, cosmological zoom-in simulations of Local Group-like volumes of MW/M31 pairs. Using these, I will thoroughly investigate the TBTF problem, including both MW/M31 satellites and field halos, to illustrate the severity of the discrepancy, the difficulties faced in resolving it, and the insights that it provides into small-scale galaxy formation.

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].