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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.

Institucijski repozitorij: Repozitorij Prirodoslovno-matematičkog fakulteta

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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, br. 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 i 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, br. 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, i 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]. 10.07.2023. [pristupljeno 05.10.2024.];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, br. 2, Srpanj 2023. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:538464. [Citirano: 05.10.2024.]

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Naslov (engleski)An Ultradeep Multiband Very Large Array Survey of the Faint Radio Sky (COSMOS-XS): New Constraints on the Optically Dark Population
AutorD. van der Vlugt
AutorJ. A. Hodge
AutorS. Jin
AutorH. S. B. Algera
AutorS. K. Leslie
AutorD. A. Riechers
AutorH. Röttgering
AutorV. Smolčić
AutorF. Walter
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Sažetak (engleski)
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.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaThe Astrophysical Journal
Brojčani podacivol. 951, br. 2, 131
p-ISSN0004-637X
e-ISSN1538-4357
DOIhttps://doi.org/10.3847/1538-4357/acd549
URN:NBNurn:nbn:hr:217:538464
Datum objave publikacije2023-07-10
URL dokumentahttps://iopscience.iop.org/article/10.3847/1538-4357/acd549
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Imenovanje 4.0 međunarodna (CC BY 4.0)
Javna napomenaOriginal 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.
Datum i vrijeme pohrane2024-07-23 10:06:45