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  The CO Luminosity Density at High-z (COLDz) Survey: A Sensitive, Large-area Blind Search for Low-J CO Emission from Cold Gas in the Early Universe with the Karl G. Jansky Very Large Array

Pavesi, R., Sharon, C. E., Riechers, D. A., Hodge, J. A., Decarli, R., Walter, F., et al. (2018). The CO Luminosity Density at High-z (COLDz) Survey: A Sensitive, Large-area Blind Search for Low-J CO Emission from Cold Gas in the Early Universe with the Karl G. Jansky Very Large Array. The Astrophysical Journal, 864.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CBD0-B Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CBD1-A
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2018ApJ...864...49P (Any fulltext)
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 Creators:
Pavesi, Riccardo1, Author
Sharon, Chelsea E.1, Author
Riechers, Dominik A.1, Author
Hodge, Jacqueline A.1, Author
Decarli, Roberto1, Author
Walter, Fabian1, Author
Carilli, Chris L.1, Author
Daddi, Emanuele1, Author
Smail, Ian1, Author
Dickinson, Mark1, Author
Ivison, Rob J.1, Author
Sargent, Mark1, Author
da Cunha, Elisabete1, Author
Aravena, Manuel1, Author
Darling, Jeremy1, Author
Smolčić, Vernesa1, Author
Scoville, Nicholas Z.1, Author
Capak, Peter L.1, Author
Wagg, Jeff1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: galaxies: evolution galaxies: formation galaxies: high-redshift galaxies: ISM radio lines: galaxies surveys Astrophysics - Astrophysics of Galaxies Astrophysics - Cosmology and Nongalactic Astrophysics
 Abstract: We describe the CO Luminosity Density at High-z (COLDz) survey, the first spectral line deep field targeting CO(1-0) emission from galaxies at z = 1.95-2.85 and CO(2-1) at z = 4.91-6.70. The main goal of COLDz is to constrain the cosmic density of molecular gas at the peak epoch of cosmic star formation. By targeting both a wide (̃51 arcmin2) and a deep (̃9 arcmin2) area, the survey is designed to robustly constrain the bright end and the characteristic luminosity of the CO(1-0) luminosity function. An extensive analysis of the reliability of our line candidates and new techniques provide detailed completeness and statistical corrections as necessary to determine the best constraints to date on the CO luminosity function. Our blind search for CO(1-0) uniformly selects starbursts and massive main-sequence galaxies based on their cold molecular gas masses. Our search also detects CO(2-1) line emission from optically dark, dusty star-forming galaxies at z > 5. We find a range of spatial sizes for the CO-traced gas reservoirs up to ̃40 kpc, suggesting that spatially extended cold molecular gas reservoirs may be common in massive, gas-rich galaxies at z ̃ 2. Through CO line stacking, we constrain the gas mass fraction in previously known typical star-forming galaxies at z = 2-3. The stacked

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 Dates: 2018
 Publication Status: Issued
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 864 Sequence Number: - Start / End Page: - Identifier: -