Connecting Reionization to the Local Universe
Abstract
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{sup -1} across and a resolution of about 1 Mpc. We resolve the formation of about 2 x 10{sup 6} halos of mass greater than {approx} 10{sup 12} M{sub {circle_dot}} 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 {approx} 15 and ends by z {approx} 6, we find a strong bias for cluster-size halos to be in the regions which reionized first, at redshifts 10 < z < 15. Consequently, material in clusters was reionized within relatively small regions, on the order of a few Mpc, implying that all clusters in our calculation were reionized by their own progenitors. Milky Way mass halos were on average reionized later and by larger regions, with a distribution most similar to the global one, indicating that low mass halos are nearly uncorrelated with reionization when only their mass is taken as a prior. On average, we find that most halos with mass less than 10{supmore »
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 962098
- Report Number(s):
- SLAC-PUB-13722
arXiv:0812.3405; TRN: US200916%%48
- DOE Contract Number:
- AC02-76SF00515
- Resource Type:
- Journal Article
- Journal Name:
- Submitted to Astrophysical Journal Letters
- Additional Journal Information:
- Journal Name: Submitted to Astrophysical Journal Letters
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DISTRIBUTION; GALAXIES; MILKY WAY; RESOLUTION; SATELLITES; UNIVERSE; Astrophysics,
Citation Formats
Alvarez, Marcelo A, Busha, Michael, Abel, Tom, Wechsler, Risa H, and /KIPAC, Menlo Park. Connecting Reionization to the Local Universe. United States: N. p., 2009.
Web. doi:10.1088/0004-637X/703/2/L167.
Alvarez, Marcelo A, Busha, Michael, Abel, Tom, Wechsler, Risa H, & /KIPAC, Menlo Park. Connecting Reionization to the Local Universe. United States. https://doi.org/10.1088/0004-637X/703/2/L167
Alvarez, Marcelo A, Busha, Michael, Abel, Tom, Wechsler, Risa H, and /KIPAC, Menlo Park. 2009.
"Connecting Reionization to the Local Universe". United States. https://doi.org/10.1088/0004-637X/703/2/L167. https://www.osti.gov/servlets/purl/962098.
@article{osti_962098,
title = {Connecting Reionization to the Local Universe},
author = {Alvarez, Marcelo A and Busha, Michael and Abel, Tom and Wechsler, Risa H and /KIPAC, Menlo Park},
abstractNote = {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{sup -1} across and a resolution of about 1 Mpc. We resolve the formation of about 2 x 10{sup 6} halos of mass greater than {approx} 10{sup 12} M{sub {circle_dot}} 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 {approx} 15 and ends by z {approx} 6, we find a strong bias for cluster-size halos to be in the regions which reionized first, at redshifts 10 < z < 15. Consequently, material in clusters was reionized within relatively small regions, on the order of a few Mpc, implying that all clusters in our calculation were reionized by their own progenitors. Milky Way mass halos were on average reionized later and by larger regions, with a distribution most similar to the global one, indicating that low mass halos are nearly uncorrelated with reionization when only their mass is taken as a prior. On average, we find that most halos with mass less than 10{sup 13} M{sub {circle_dot}} were reionized internally, while almost all halos with masses greater than 10{sup 14} M{sub {circle_dot}} were reionized by their own progenitors. We briefly discuss the implications of this work in light of the 'missing satellites' problem and how this new approach may be extended further.},
doi = {10.1088/0004-637X/703/2/L167},
url = {https://www.osti.gov/biblio/962098},
journal = {Submitted to Astrophysical Journal Letters},
number = ,
volume = ,
place = {United States},
year = {Mon Aug 03 00:00:00 EDT 2009},
month = {Mon Aug 03 00:00:00 EDT 2009}
}