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Scientific paper - Original scientific paper
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
Astrophysical Journal, 864 (2018); 49. https://doi.org/10.3847/1538-4357/aacb79
Pavesi, Riccardo; Sharon, Chelsea E.; Riechers, Dominik A.; Hodge, Jacqueline A.; Decarli, Roberto; Walter, Fabian; Carilli, Chris L.; Daddi, Emanuele; Smail, Ian; Dickinson, Mark; Ivison, Rob J.; Sargent, Mark; da Cunha, Elisabete; Aravena, Manuel; Darling, Jeremy; Smolčić, Vernesa; Scoville, Nicholas Z.; Capak, Peter L.; Wagg, Jeff More authors...

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Pavesi, R., Sharon, C. E., Riechers, D. A., Hodge, J. A., Decarli, R., Walter, F. ... Wagg, J. (2018). 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. Astrophysical Journal, 864.. doi: 10.3847/1538-4357/aacb79

Pavesi, Riccardo, et al. "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." Astrophysical Journal, vol. 864, 2018. https://doi.org/10.3847/1538-4357/aacb79

Pavesi, Riccardo, Chelsea E. Sharon, Dominik A. Riechers, Jacqueline A. Hodge, Roberto Decarli, Fabian Walter, Chris L. Carilli, et al. "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." Astrophysical Journal 864 (2018). https://doi.org/10.3847/1538-4357/aacb79

Pavesi, R., et al. (2018) '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', Astrophysical Journal, 864. doi: 10.3847/1538-4357/aacb79

Pavesi R, Sharon CE, Riechers DA, Hodge JA, Decarli R, Walter F, and sur.. 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. Astrophysical Journal [Internet]. 2018 [cited 2025 March 08];864. doi: 10.3847/1538-4357/aacb79

R. Pavesi, et al., "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", Astrophysical Journal, vol. 864, 2018. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:963976. [Accessed: 08 March 2025]

Metadata
Title (english)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
AuthorRiccardo Pavesi
AuthorChelsea E. Sharon
AuthorDominik A. Riechers
AuthorJacqueline A. Hodge
AuthorRoberto Decarli
AuthorFabian Walter
AuthorChris L. Carilli
AuthorEmanuele Daddi
AuthorIan Smail
AuthorMark Dickinson
AuthorRob J. Ivison
AuthorMark Sargent
AuthorElisabete da Cunha
AuthorManuel Aravena
AuthorJeremy Darling
AuthorVernesa Smolčić
MBZ: 336180
AuthorNicholas Z. Scoville
AuthorPeter L. Capak
AuthorJeff Wagg
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Astronomy and Astrophysics
Abstract (english)
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 arcmin^2) 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 CO detection suggests lower molecular gas mass fractions than expected for massive main-sequence galaxies by a factor of ~3–6. We find total CO line brightness at ~34 GHz of 0.45 ± 0.2 μK, which constrains future line intensity mapping and CMB experiments.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleAstrophysical Journal
Numberingvol. 864, 49
p-ISSN0004-637X
e-ISSN1538-4357
DOIhttps://doi.org/10.3847/1538-4357/aacb79
URN:NBNurn:nbn:hr:217:963976
Publication2018
Document URLhttps://iopscience.iop.org/article/10.3847/1538-4357/aacb79
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© 2018. The American Astronomical Society. Received 2018 February 13; Revised 2018 May 29; Accepted 2018 June 6; Published 2018 August 29.
Created on2020-03-01 12:42:52