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
dc.contributor.author | Pavesi, Riccardo | |
dc.contributor.author | Sharon, Chelsea E. | |
dc.contributor.author | Riechers, Dominik A. | |
dc.contributor.author | Hodge, Jacqueline A. | |
dc.contributor.author | Decarli, R. | |
dc.contributor.author | Walter, Fabian | |
dc.contributor.author | Carilli, Chris L. | |
dc.contributor.author | Daddi, Emanuele | |
dc.contributor.author | Smail, Ian | |
dc.contributor.author | Dickinson, Mark | |
dc.contributor.author | Ivison, Rob J. | |
dc.contributor.author | Sargent, Mark | |
dc.contributor.author | Cunha, Elisabete da | |
dc.contributor.author | Aravena, Manuel | |
dc.contributor.author | Darling, Jeremy | |
dc.contributor.author | Smolčić, Vernesa | |
dc.contributor.author | Scoville, Nicholas Z. | |
dc.contributor.author | Capak, Peter L. | |
dc.contributor.author | Wagg, Jeff | |
dc.date.accessioned | 2019-01-09T19:22:14Z | |
dc.date.available | 2019-01-09T19:22:14Z | |
dc.date.issued | 2018-09-01 | |
dc.identifier.citation | Riccardo Pavesi et al 2018 ApJ 864 49 | en_US |
dc.identifier.issn | 1538-4357 | |
dc.identifier.doi | 10.3847/1538-4357/aacb79 | |
dc.identifier.uri | http://hdl.handle.net/10150/631445 | |
dc.description.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 (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.sponsorship | National 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.iso | en | en_US |
dc.publisher | IOP PUBLISHING LTD | en_US |
dc.relation.url | http://stacks.iop.org/0004-637X/864/i=1/a=49?key=crossref.056af8975060cc8957c361d0844e79d5 | en_US |
dc.rights | © 2018. The American Astronomical Society. All rights reserved. | en_US |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | galaxies: evolution | en_US |
dc.subject | galaxies: formation | en_US |
dc.subject | galaxies: high-redshift | en_US |
dc.subject | galaxies: ISM | en_US |
dc.subject | radio lines: galaxies | en_US |
dc.subject | surveys | en_US |
dc.title | 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 | en_US |
dc.type | Article | en_US |
dc.contributor.department | Univ Arizona, Steward Observ | en_US |
dc.identifier.journal | ASTROPHYSICAL JOURNAL | en_US |
dc.description.collectioninformation | This 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.version | Final published version | en_US |
dc.source.journaltitle | The Astrophysical Journal | |
dc.source.volume | 864 | |
dc.source.issue | 1 | |
dc.source.beginpage | 49 | |
refterms.dateFOA | 2019-01-09T19:22:14Z |