The University of Arizona

SISTA Colloquium Details

 

Monday, February 7, 2011

12:00 – 12:50 p.m.

Gould-Simpson Building, Room 906

Light refreshments in 9th floor atrium area - 11:50 a.m.

 

Speaker:

Romeel Davé, Associate Professor
Department of Astronomy

University of Arizona

Title:  From Darkness, Light: Computing Cosmic Reionization

Abstract: The cosmic dark ages ended as the first sources of radiation formed just a few hundred Myr after the Big Bang; by 1 Gyr, the Universe
was fully reionized into its present, mostly transparent state.  This transformation, known as cosmic reionization, is the last major phase transition in our Universe, and understanding how it transpired is a central question in astronomy that motivates many of the next decade's most ambitious telescopes.  I will review current observational and theoretical work on reionization, particularly highlighting early results from our unique new cosmological radiative hydrodynamics simulations. I will show that processes of galaxy formation, large scale structure growth, and radiative transfer are intimately intertwined, and all are critical for understanding reionization.  The severe computational requirements and complex multi-scale physics make reionization a frontier challenge in numerical hydrodynamics.