Connecting Reionization to the Local Universe

Details Connecting Reionization to the Local Universe Connecting Reionization to the Local Universe

2008-12-18

arxiv.org/abs/0812.3405v1

Astrophys.J.703:L167-L171,2009

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, submitted to ApJ Letters, comments welcome. See http://www.slac.stanford.edu/~malvarez/ReionLocal for high

Scientific paper

10.1088/0004-637X/703/2/L167

We present results of combined N-body and three-dimensional reionization calculations to determine the relationship between reionization history and local environment in a volume 1 Gpc/h across and a resolution of about 1 Mpc. We resolve the formation of about 2x10^6 halos of mass greater than ~10^12 Msun at z=0, allowing us to determine the relationship between halo mass and reionization epoch for galaxies and clusters. For our fiducial reionization model, in which reionization begins at z~15 and ends by z~6, we find a strong bias for cluster-size halos to be in the regions which reionized first, at redshifts 10

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