Cosmic Reionization On Computers: Reionization Histories of Present-day Galaxies
- Univ. of Chicago, IL (United States)
- Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics; Univ. of Chicago, IL (United States). Enrico Fermi Inst.
- Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics; Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Particle Astrophysics Center
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.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Heising-Simons Foundation
- Grant/Contract Number:
- AC02-07CH11359; AC02-06CH11357; NNX17AK65G
- OSTI ID:
- 1545115
- Report Number(s):
- arXiv:1903.06179; FERMILAB-PUB-19-166-A; oai:inspirehep.net:1725212
- Journal Information:
- The Astrophysical Journal (Online), Vol. 882, Issue 2; ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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