Connecting CO intensity mapping to molecular gas and star formation in the epoch of galaxy assembly

Li, Tony Y.; Wechsler, Risa H.; Devaraj, Kiruthika; Church, Sarah E.

doi:10.3847/0004-637X/817/2/169

Title: Connecting CO intensity mapping to molecular gas and star formation in the epoch of galaxy assembly

Journal Article · Fri Jan 29 00:00:00 EST 2016 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/0004-637X/817/2/169· OSTI ID:1257726

Li, Tony Y. ^[1]; Wechsler, Risa H. ^[2]; Devaraj, Kiruthika ^[1]; Church, Sarah E. ^[1]

Stanford Univ., Stanford, CA (United States)
Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Intensity mapping, which images a single spectral line from unresolved galaxies across cosmological volumes, is a promising technique for probing the early universe. Here we present predictions for the intensity map and power spectrum of the CO(1–0) line from galaxies at $$z\sim 2.4$$–2.8, based on a parameterized model for the galaxy–halo connection, and demonstrate the extent to which properties of high-redshift galaxies can be directly inferred from such observations. We find that our fiducial prediction should be detectable by a realistic experiment. Motivated by significant modeling uncertainties, we demonstrate the effect on the power spectrum of varying each parameter in our model. Using simulated observations, we infer constraints on our model parameter space with an MCMC procedure, and show corresponding constraints on the $${L}_{\mathrm{IR}}$$–$${L}_{\mathrm{CO}}$$ relation and the CO luminosity function. These constraints would be complementary to current high-redshift galaxy observations, which can detect the brightest galaxies but not complete samples from the faint end of the luminosity function. Furthermore, by probing these populations in aggregate, CO intensity mapping could be a valuable tool for probing molecular gas and its relation to star formation in high-redshift galaxies.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1257726

Report Number(s):: SLAC-PUB-16572

Journal Information:: The Astrophysical Journal (Online), Vol. 817, Issue 2; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 97 works

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Journal Article · Fri Jan 20 00:00:00 EST 2012 · Astrophysical Journal · OSTI ID:1257726

Yan, Gong; Cooray, Asantha; Silva, Marta; +4 more

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79 ASTRONOMY AND ASTROPHYSICS
galaxies: high-redshift
galaxies: evolution
ISM: molecules

Title: Connecting CO intensity mapping to molecular gas and star formation in the epoch of galaxy assembly

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