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dc.contributor.authorPavesi, Riccardo
dc.contributor.authorSharon, Chelsea E.
dc.contributor.authorRiechers, Dominik A.
dc.contributor.authorHodge, Jacqueline A.
dc.contributor.authorDecarli, R.
dc.contributor.authorWalter, Fabian
dc.contributor.authorCarilli, Chris L.
dc.contributor.authorDaddi, Emanuele
dc.contributor.authorSmail, Ian
dc.contributor.authorDickinson, Mark
dc.contributor.authorIvison, Rob J.
dc.contributor.authorSargent, Mark
dc.contributor.authorCunha, Elisabete da
dc.contributor.authorAravena, Manuel
dc.contributor.authorDarling, Jeremy
dc.contributor.authorSmolčić, Vernesa
dc.contributor.authorScoville, Nicholas Z.
dc.contributor.authorCapak, Peter L.
dc.contributor.authorWagg, Jeff
dc.date.accessioned2019-01-09T19:22:14Z
dc.date.available2019-01-09T19:22:14Z
dc.date.issued2018-09-01
dc.identifier.citationRiccardo Pavesi et al 2018 ApJ 864 49en_US
dc.identifier.issn1538-4357
dc.identifier.doi10.3847/1538-4357/aacb79
dc.identifier.urihttp://hdl.handle.net/10150/631445
dc.description.abstractWe 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 (similar to 51 arcmin(2)) and a deep (similar to 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 similar to 40 kpc, suggesting that spatially extended cold molecular gas reservoirs may be common in massive, gas-rich galaxies at z similar to 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 similar to 3-6. We find total CO line brightness at similar to 34 GHz of 0.45 +/- 0.2 mu K, which constrains future line intensity mapping and CMB experiments.en_US
dc.description.sponsorshipNational Science Foundation [AST-1614213]; NRAO [SOSPA3-008]; ERC Advanced Grant DUSTYGAL [321334]; STFC [ST/P000541/1]; Royal Society/Wolfson Merit Award; European Union's Seventh Frame-work program [337595]; ERC [321302]; 3D-HST Treasury Program [GO 12177, 12328]; NASA [NAS5-26555]; VIDI research program - Netherlands Organisation for Scientific Research (NWO) [639.042.611]; Science and Technology Facilities Council [ST/P000252/1]en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.relation.urlhttp://stacks.iop.org/0004-637X/864/i=1/a=49?key=crossref.056af8975060cc8957c361d0844e79d5en_US
dc.rights© 2018. The American Astronomical Society. All rights reserved.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: formationen_US
dc.subjectgalaxies: high-redshiften_US
dc.subjectgalaxies: ISMen_US
dc.subjectradio lines: galaxiesen_US
dc.subjectsurveysen_US
dc.titleThe 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 Arrayen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalASTROPHYSICAL JOURNALen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astrophysical Journal
dc.source.volume864
dc.source.issue1
dc.source.beginpage49
refterms.dateFOA2019-01-09T19:22:14Z


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