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 04:00:00 UTC 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 Lab., 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), Journal Name: The Astrophysical Journal (Online) Journal Issue: 2 Vol. 817; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cosmology with intensity mapping techniques using atomic and molecular lines Fonseca, José; Silva, Marta B.; Santos, Mário G. arXiv https://doi.org/10.48550/arxiv.1607.05288	text	January 2016
Dissecting the high-z interstellar medium through intensity mapping cross-correlations Serra, Paolo; Doré, Olivier; Lagache, Guilaine arXiv https://doi.org/10.48550/arxiv.1608.00585	text	January 2016
Impact of Simulated 1/f Noise for HI Intensity Mapping Experiments Harper, Stuart; Dickinson, Clive; Battye, Richard arXiv https://doi.org/10.48550/arxiv.1711.07843	text	January 2017
Probing Cosmic Origins with CO and [CII] Emission Lines Dizgah, Azadeh Moradinezhad; Keating, Garrett K.; Fialkov, Anastasia arXiv https://doi.org/10.48550/arxiv.1801.10178	text	January 2018
Searching for Decaying and Annihilating Dark Matter with Line Intensity Mapping Creque-Sarbinowski, Cyril; Kamionkowski, Marc arXiv https://doi.org/10.48550/arxiv.1806.11119	text	January 2018
Line intensity mapping with [CII] and CO(1-0) as probes of primordial non-Gaussianity Dizgah, Azadeh Moradinezhad; Keating, Garrett K. arXiv https://doi.org/10.48550/arxiv.1810.02850	text	January 2018
Constraining the evolution of CII intensity through the end stages of reionization Padmanabhan, Hamsa arXiv https://doi.org/10.48550/arxiv.1811.01968	text	January 2018
Observing AGN feedback with CO intensity mapping Breysse, Patrick C.; Alexandroff, Rachael M. arXiv https://doi.org/10.48550/arxiv.1904.03197	text	January 2019
A Self-consistent Framework for Multiline Modeling in Line Intensity Mapping Experiments Sun, Guochao; Hensley, Brandon S.; Chang, Tzu-Ching arXiv https://doi.org/10.48550/arxiv.1907.02999	text	January 2019
The Cosmic Expansion History from Line-Intensity Mapping Bernal, José Luis; Breysse, Patrick C.; Kovetz, Ely D. arXiv https://doi.org/10.48550/arxiv.1907.10065	text	January 2019
Delensing Degree-Scale $B$-Mode Polarization with High-Redshift Line Intensity Mapping Karkare, Kirit S. arXiv https://doi.org/10.48550/arxiv.1908.08128	text	January 2019

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