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Title: Cosmic Reionization On Computers: Reionization Histories of Present-day Galaxies

Abstract

We examine the reionization history of present-day galaxies by explicitly tracing the building blocks of halos from the Cosmic Reionization On Computers project. We track dark matter particles that belong to $z=0$ halos to trace the neutral fractions at corresponding positions during rapid global reionization. The resulting particle reionization histories allow us to explore different definitions of a halo's reionization redshift and to account for the neutral content of the interstellar medium. Consistent with previous work, we find a systematic trend of reionization redshift with mass - present day halos with higher masses have earlier reionization times. Finally, we quantify the spread of reionization times within each halo, which also has a mass dependence.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]
  1. Univ. of Chicago, IL (United States)
  2. Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics; Univ. of Chicago, IL (United States). Enrico Fermi Inst.
  3. Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics; Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Particle Astrophysics Center
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Heising-Simons Foundation
OSTI Identifier:
1545115
Report Number(s):
arXiv:1903.06179; FERMILAB-PUB-19-166-A
Journal ID: ISSN 1538-4357; oai:inspirehep.net:1725212
Grant/Contract Number:  
AC02-07CH11359; AC02-06CH11357; NNX17AK65G
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 882; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; dark ages; reionization; first stars; galaxies: high-redshift; methods: numerical

Citation Formats

Zhu, Hanjue, Avestruz, Camille, and Gnedin, Nickolay Y. Cosmic Reionization On Computers: Reionization Histories of Present-day Galaxies. United States: N. p., 2019. Web. https://doi.org/10.3847/1538-4357/ab3794.
Zhu, Hanjue, Avestruz, Camille, & Gnedin, Nickolay Y. Cosmic Reionization On Computers: Reionization Histories of Present-day Galaxies. United States. https://doi.org/10.3847/1538-4357/ab3794
Zhu, Hanjue, Avestruz, Camille, and Gnedin, Nickolay Y. Fri . "Cosmic Reionization On Computers: Reionization Histories of Present-day Galaxies". United States. https://doi.org/10.3847/1538-4357/ab3794. https://www.osti.gov/servlets/purl/1545115.
@article{osti_1545115,
title = {Cosmic Reionization On Computers: Reionization Histories of Present-day Galaxies},
author = {Zhu, Hanjue and Avestruz, Camille and Gnedin, Nickolay Y.},
abstractNote = {We examine the reionization history of present-day galaxies by explicitly tracing the building blocks of halos from the Cosmic Reionization On Computers project. We track dark matter particles that belong to $z=0$ halos to trace the neutral fractions at corresponding positions during rapid global reionization. The resulting particle reionization histories allow us to explore different definitions of a halo's reionization redshift and to account for the neutral content of the interstellar medium. Consistent with previous work, we find a systematic trend of reionization redshift with mass - present day halos with higher masses have earlier reionization times. Finally, we quantify the spread of reionization times within each halo, which also has a mass dependence.},
doi = {10.3847/1538-4357/ab3794},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 882,
place = {United States},
year = {2019},
month = {9}
}

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