New Results on Cosmic Reionization

Details New Results on Cosmic Reionization New Results on Cosmic Reionization

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21914315s&link_type=abstract

American Astronomical Society, AAS Meeting #219, #143.15

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When the first starts began to form in the LCDM universe at high redshift, they released ionizing and dissociating UV radiation into their surroundings which influenced the formation of other stars and galaxies, near and far, and left an observable imprint on the first billion years of cosmic evolution. The theory and simulation of this process depend upon combining elements of cosmological structure formation on scales large and small with radiative transfer, gas and gravitational dynamics. Results will be presented of our latest large-scale simulations of reionization and its observable signatures, including fluctuations in the cosmic 21cm, near-IR and microwave backgrounds. We have now simulated reionization using our C2RAY method to trace the ionizing and dissociating UV radiation from the millions of galactic halo sources, through the underlying intergalactic density field, computed with our CUBEP3M N-body code with as many as 165 billion particles, in comoving volumes that range from 30 to 600 Mpc on a side.
This work is supported by NSF, NASA, and the U.Texas TACC.

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