Constraining the expansion history and early dark energy with line intensity mapping

Kirit S. Karkare and Simeon Bird
Phys. Rev. D 98, 043529 – Published 28 August 2018

Abstract

We consider the potential for line intensity mapping (IM) experiments to measure the baryon acoustic oscillations (BAO) from 3<z<6. This would constrain the expansion history in a redshift range that is currently unexplored. We calculate the map depths that future IM experiments targeting the CO(1-0) rotational transition line and [CII] ionized carbon fine-structure line would need to achieve in order to measure the BAO. We find that near-future IM experiments could constrain the BAO scale to 5% or better depending on CO/[CII] model amplitude. This measurement is at a precision that could make competitive constraints on models of early dark energy.

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  • Received 9 July 2018

DOI:https://doi.org/10.1103/PhysRevD.98.043529

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Kirit S. Karkare*

  • Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA

Simeon Bird

  • University of California, Riverside, Riverside, California 92521, USA

  • *kkarkare@kicp.uchicago.edu

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Issue

Vol. 98, Iss. 4 — 15 August 2018

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