prikaz prve stranice dokumenta An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population
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Scientific paper - Original scientific paper
An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population
The Astrophysical Journal, 951 (2023), 2; 131. https://doi.org/10.3847/1538-4357/acd549
van der Vlugt, D.; Hodge, J. A.; Jin, S.; Algera, H. S. B.; Leslie, S. K.; Riechers, D. A.; Röttgering, H.; Smolčić, V.; Walter, F.

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van der Vlugt, D., Hodge, J. A., Jin, S., Algera, H. S. B., Leslie, S. K., Riechers, D. A. ... Walter, F. (2023). An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population. The Astrophysical Journal, 951. (2). doi: 10.3847/1538-4357/acd549

van der Vlugt, D., et al. "An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population." The Astrophysical Journal, vol. 951, no. 2, 2023. https://doi.org/10.3847/1538-4357/acd549

van der Vlugt, D., J. A. Hodge, S. Jin, H. S. B. Algera, S. K. Leslie, D. A. Riechers, H. Röttgering, V. Smolčić and F. Walter. "An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population." The Astrophysical Journal 951, no. 2 (2023). https://doi.org/10.3847/1538-4357/acd549

van der Vlugt, D., et al. (2023) 'An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population', The Astrophysical Journal, 951(2). doi: 10.3847/1538-4357/acd549

van der Vlugt D, Hodge JA, Jin S, Algera HSB, Leslie SK, Riechers DA, and sur.. An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population. The Astrophysical Journal [Internet]. 2023 July 10 [cited 2024 December 03];951(2). doi: 10.3847/1538-4357/acd549

D. van der Vlugt, et al., "An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population", The Astrophysical Journal, vol. 951, no. 2, July 2023. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:538464. [Accessed: 03 December 2024]

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Metadata
Title (english)An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population
AuthorD. van der Vlugt
AuthorJ. A. Hodge
AuthorS. Jin
AuthorH. S. B. Algera
AuthorS. K. Leslie
AuthorD. A. Riechers
AuthorH. Röttgering
AuthorV. Smolčić
AuthorF. Walter
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
Attempts to trace star formation with rest-frame UV/optical observations at redshifts z > 2 are affected by the presence of potentially substantial, yet uncertain, dust attenuation. Recent studies have demonstrated the existence of a population of galaxies that are virtually invisible in the observed optical/near-infrared (NIR) due to dust obscuration, but which could contribute substantially to the star formation history at 2 < z < 6. Here, we make use of ultradeep 3 GHz Karl G. Jansky Very Large Array observations from the COSMOS-XS survey to investigate the contribution 20of radio-selected "optically dark" galaxies (undetected to a depth of K S ~ 25.9 mag) to the cosmic star formation rate density (SFRD). We identify 19 such "optically dark" sources and utilize recent deblended far-infrared photometry to determine photometric redshifts based on IR and radio information for 11 of them. Through stacking, we infer that the remaining eight sources reside predominantly at high redshift (z > 4). Therefore, we conservatively assume these sources lie between z = 2 and z = 5. We derive the radio luminosity function (LF) for the sample with and without "optically dark" sources by fixing the faint and bright end shape of the radio LF to the local values and allowing for luminosity evolution. By integrating both LFs, we estimate the contribution of the "optically dark" galaxies to the radio SFRD to be ∼15+7−7% at z ~ 5. This is consistent with constraints from NIR-dark and UV-dark sources, while being in disagreement with some estimates using H-dropouts. This result implies that "optically dark" sources play a nonnegligible role at high redshift.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleThe Astrophysical Journal
Numberingvol. 951, no. 2, 131
p-ISSN0004-637X
e-ISSN1538-4357
DOIhttps://doi.org/10.3847/1538-4357/acd549
URN:NBNurn:nbn:hr:217:538464
Publication2023-07-10
Document URLhttps://iopscience.iop.org/article/10.3847/1538-4357/acd549
Type of resourceText
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Public noteOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2023 January 16; revised 2023 May 12; accepted 2023 May 12; published 2023 July 10.
Created on2024-07-23 10:06:45