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Title: Measuring the growth of structure with intensity mapping surveys

Journal Article · · Journal of Cosmology and Astroparticle Physics
 [1];  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Berkeley Center for Cosmological Physics, Berkeley, CA (United States)

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.

Research Organization:
University of California, Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0017860; 1713791
OSTI ID:
1594716
Alternate ID(s):
OSTI ID: 1593668
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 06; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (2)

Redshift-space distortions of the H i 21-cm intensity mapping signal due to the internal motions within galaxies journal June 2019
Canceling Out Intensity Mapping Foregrounds journal December 2019

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