Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections
Abstract
Here we present a new public Python package, DarkHistory, for computing the effects of dark matter annihilation and decay on the temperature and ionization history of the early universe. DarkHistory simultaneously solves for the evolution of the free electron fraction and gas temperature, and for the cooling of annihilation/decay products and the secondary particles produced in the process. Consequently, we can self-consistently include the effects of both astrophysical and exotic sources of heating and ionization, and automatically take into account backreaction, where modifications to the ionization/temperature history in turn modify the energy-loss processes for injected particles. We introduce a number of worked examples, demonstrating how to use the code in a range of different configurations, in particular for arbitrary dark matter masses and annihilation/decay final states. Possible applications of DarkHistory include mapping out the effects of dark matter annihilation/decay on the global 21 cm signal and the epoch of reionization, as well as the effects of exotic energy injections other than dark matter annihilation/decay. The code is available at https://github.com/hongwanliu/DarkHistory with documentation at https://darkhistory.readthedocs.io. Data files required to run the code can be downloaded at https://doi.org/10.7910/DVN/DUOUWA.
- Authors:
-
[1]
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics; Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); MIT Research Support Committee; National Science Foundation (NSF)
- OSTI Identifier:
- 1596611
- Report Number(s):
- MIT-CTP-5113
Journal ID: ISSN 2470-0010; PRVDAQ; arXiv:1904.09296; TRN: US2102895
- Grant/Contract Number:
- SC0013999; SC00012567
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 2; Related Information: https://github.com/hongwanliu/DarkHistory; https://doi.org/10.7910/DVN/DUOUWA; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 97 MATHEMATICS AND COMPUTING; dark matter; cosmic rays & astroparticles
Citation Formats
Liu, Hongwan, Ridgway, Gregory W., and Slatyer, Tracy R. Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections. United States: N. p., 2020.
Web. doi:10.1103/PhysRevD.101.023530.
Liu, Hongwan, Ridgway, Gregory W., & Slatyer, Tracy R. Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections. United States. https://doi.org/10.1103/PhysRevD.101.023530
Liu, Hongwan, Ridgway, Gregory W., and Slatyer, Tracy R. Thu .
"Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections". United States. https://doi.org/10.1103/PhysRevD.101.023530. https://www.osti.gov/servlets/purl/1596611.
@article{osti_1596611,
title = {Code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injections},
author = {Liu, Hongwan and Ridgway, Gregory W. and Slatyer, Tracy R.},
abstractNote = {Here we present a new public Python package, DarkHistory, for computing the effects of dark matter annihilation and decay on the temperature and ionization history of the early universe. DarkHistory simultaneously solves for the evolution of the free electron fraction and gas temperature, and for the cooling of annihilation/decay products and the secondary particles produced in the process. Consequently, we can self-consistently include the effects of both astrophysical and exotic sources of heating and ionization, and automatically take into account backreaction, where modifications to the ionization/temperature history in turn modify the energy-loss processes for injected particles. We introduce a number of worked examples, demonstrating how to use the code in a range of different configurations, in particular for arbitrary dark matter masses and annihilation/decay final states. Possible applications of DarkHistory include mapping out the effects of dark matter annihilation/decay on the global 21 cm signal and the epoch of reionization, as well as the effects of exotic energy injections other than dark matter annihilation/decay. The code is available at https://github.com/hongwanliu/DarkHistory with documentation at https://darkhistory.readthedocs.io. Data files required to run the code can be downloaded at https://doi.org/10.7910/DVN/DUOUWA.},
doi = {10.1103/PhysRevD.101.023530},
journal = {Physical Review D},
number = 2,
volume = 101,
place = {United States},
year = {Thu Jan 30 00:00:00 EST 2020},
month = {Thu Jan 30 00:00:00 EST 2020}
}
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