Measuring the growth of structure with intensity mapping surveys
Abstract
Line intensity mapping offers a new avenue for constraining cosmological parameters in the high redshift Universe. However measurements of the growth of structure, a sensitive probe of gravity, are affected by a well known degeneracy with astrophysical parameters, encoded in the mean brightness temperature of the specific line. In this work we show how to break this degeneracy, to a level that could allow constraints of the amplitude of cosmological fluctuations at the percent level, using information in the mildly non-linear regime of structure formation as described by Lagrangian Perturbation Theory. We focus on the 21-cm line with forecasts for HIRAX and the proposed Stage II experiment as illustrations.
- Authors:
-
- Univ. of California, Berkeley, CA (United States). Dept. of Physics; Berkeley Center for Cosmological Physics, Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- University of California, Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1594716
- Alternate Identifier(s):
- OSTI ID: 1593668
- Grant/Contract Number:
- SC0017860; 1713791
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Cosmology and Astroparticle Physics
- Additional Journal Information:
- Journal Volume: 2019; Journal Issue: 06; Journal ID: ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; cosmological parameters from LSS; power spectrum; 21 cm; galaxy clustering; CMB
Citation Formats
Castorina, Emanuele, and White, Martin. Measuring the growth of structure with intensity mapping surveys. United States: N. p., 2019.
Web. doi:10.1088/1475-7516/2019/06/025.
Castorina, Emanuele, & White, Martin. Measuring the growth of structure with intensity mapping surveys. United States. https://doi.org/10.1088/1475-7516/2019/06/025
Castorina, Emanuele, and White, Martin. Tue .
"Measuring the growth of structure with intensity mapping surveys". United States. https://doi.org/10.1088/1475-7516/2019/06/025. https://www.osti.gov/servlets/purl/1594716.
@article{osti_1594716,
title = {Measuring the growth of structure with intensity mapping surveys},
author = {Castorina, Emanuele and White, Martin},
abstractNote = {Line intensity mapping offers a new avenue for constraining cosmological parameters in the high redshift Universe. However measurements of the growth of structure, a sensitive probe of gravity, are affected by a well known degeneracy with astrophysical parameters, encoded in the mean brightness temperature of the specific line. In this work we show how to break this degeneracy, to a level that could allow constraints of the amplitude of cosmological fluctuations at the percent level, using information in the mildly non-linear regime of structure formation as described by Lagrangian Perturbation Theory. We focus on the 21-cm line with forecasts for HIRAX and the proposed Stage II experiment as illustrations.},
doi = {10.1088/1475-7516/2019/06/025},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 06,
volume = 2019,
place = {United States},
year = {Tue Jun 11 00:00:00 EDT 2019},
month = {Tue Jun 11 00:00:00 EDT 2019}
}
Web of Science
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Works referencing / citing this record:
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