prikaz prve stranice dokumenta The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population
  Preuzmi
PDF 10.15 MB
Znanstveni rad - Izvorni znanstveni rad
The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population
Astronomy and Astrophysics, 602 (2017); 2. https://doi.org/10.1051/0004-6361/201630223
Smolčić, Vernesa; Delvecchio, I.; Zamorani, G.; Baran, N.; Novak, Mladen; Delhaize, J.; Schinnerer, E.; Berta, S.; Bondi, M.; Ciliegi, P.; Capak, P.; Civano, F.; Karim, A.; Le Fevre, O.; Ilbert, O.; Laigle, C.; Marchesi, S.; McCracken, H. J.; Tasca, L.; Salvato, M.; Vardoulaki, E. Više autora...

Citirajte ovaj rad

Smolčić, V., Delvecchio, I., Zamorani, G., Baran, N., Novak, M., Delhaize, J. ... Vardoulaki, E. (2017). The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population. Astronomy and Astrophysics, 602.. doi: 10.1051/0004-6361/201630223

Smolčić, Vernesa, et al. "The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population." Astronomy and Astrophysics, vol. 602, 2017. https://doi.org/10.1051/0004-6361/201630223

Smolčić, Vernesa, I. Delvecchio, G. Zamorani, N. Baran, Mladen Novak, J. Delhaize, E. Schinnerer, et al. "The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population." Astronomy and Astrophysics 602 (2017). https://doi.org/10.1051/0004-6361/201630223

Smolčić, V., et al. (2017) 'The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population', Astronomy and Astrophysics, 602. doi: 10.1051/0004-6361/201630223

Smolčić V, Delvecchio I, Zamorani G, Baran N, Novak M, Delhaize J, i sur.. The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population. Astronomy and Astrophysics [Internet]. 2017. [pristupljeno 20.04.2024.];602. doi: 10.1051/0004-6361/201630223

V. Smolčić, et al., "The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population", Astronomy and Astrophysics, vol. 602, 2017. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:078356. [Citirano: 20.04.2024.]

Za citiranje koristite ovu mrežnu adresu: https://urn.nsk.hr/urn:nbn:hr:217:078356
Prijavite se u repozitorij kako biste mogli spremiti objekt u svoju listu.
Podaci o radu
Naslov (engleski)The VLA-COSMOS 3 GHz Large Project: Multiwavelength counterparts and the composition of the faint radio population
AutorVernesa Smolčić
MBZ: 336180
AutorI. Delvecchio
AutorG. Zamorani
AutorN. Baran
AutorMladen Novak
MBZ: 344074
AutorJ. Delhaize
AutorE. Schinnerer
AutorS. Berta
AutorM. Bondi
AutorP. Ciliegi
AutorP. Capak
AutorF. Civano
AutorA. Karim
AutorO. Le Fevre
AutorO. Ilbert
AutorC. Laigle
AutorS. Marchesi
AutorH. J. McCracken
AutorL. Tasca
AutorM. Salvato
AutorE. Vardoulaki
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Astronomija i astrofizika
Sažetak (engleski)
We study the composition of the faint radio population selected from the Karl G. Jansky Very Large Array Cosmic Evolution Survey (VLA-COSMOS) 3 GHz Large Project, which is a radio continuum survey performed at 10 cm wavelength. The survey covers a 2.6 square degree area with a mean rms of ∼2.3 µJy/beam, cataloging 10 830 sources above 5σ, and enclosing the full 2 square degree COSMOS field. By combining these radio data with optical, near-infrared (UltraVISTA), and mid-infrared (Spitzer/IRAC) data, as well as X-ray data (Chandra), we find counterparts to radio sources for ∼93% of the total radio sample reaching out to z .6 ; these sources are found in the unmasked areas of the COSMOS field, i.e., those not affected by saturated or bright sources in the optical to near-infrared (NIR) bands. We further classify the sources as star-forming galaxies or AGN based on various criteria, such as X-ray luminosity ; observed mid-infrared color ; UV–far- infrared spectral energy distribution ; rest- frame, near-UV optical color that is corrected for dust extinction ; and radio excess relative to that expected from the star formation rate of the hosts. We separate the AGN into subsamples dominated by low-to-moderate and moderate-to-high radiative luminosity AGN, i.e., candidates for highredshift analogs to local low- and high- excitation emission line AGN, respectively. We study the fractional contributions of these subpopulations down to radio flux levels of ∼11 µJy at 3 GHz (or ∼20 µJy at 1.4 GHz assuming a spectral index of –0.7). We find that the dominant fraction at 1.4 GHz flux densities above ∼200 µJy is constituted of low-to-moderate radiative luminosity AGN. Below densities of ∼100 µJy the fraction of star-forming galaxies increases to ∼60%, followed by the moderate-to-high radiative luminosity AGN (∼20%) and low-to-moderate radiative luminosity AGN (∼20%). Based on this observational evidence, we extrapolate the fractions down to sensitivities of the Square Kilometer Array (SKA). Our estimates suggest that at the faint flux limits to be reached by the (Wide, Deep, and UltraDeep) SKA1 surveys, a selection based only on radio flux limits can provide a simple tool to efficiently identify samples highly (>75%) dominated by star-forming galaxies.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaAstronomy and Astrophysics
Brojčani podacivol. 602, 2
p-ISSN0004-6361
e-ISSN1432-0746
DOIhttps://doi.org/10.1051/0004-6361/201630223
URN:NBNurn:nbn:hr:217:078356
Datum objave publikacije2017
URL dokumentahttps://www.aanda.org/articles/aa/abs/2017/06/aa30223-16/aa30223-16.html
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Zaštićeno autorskim pravom.
Javna napomena© ESO 2017. Received 9 December 2016. Accepted 12 April 2017. Published online 13 June 2017.Acknowledgements. Zgal group: European Union’s Seventh Framework program under grant agreement 333654 (CIG, “AGN feedback”; N.B., V.S.) and grant agreement 337595 (ERC Starting Grant, “CoSMass”; V.S., I.D., J.D., M.N.). C.L. acknowledges the funding by a Discovery Early Career Researcher Award (DE150100618). Partially based on data obtained with the European Southern Observatory Very Large Telescope, Paranal, Chile, under Large Programs 175.A-0839 (the zCOSMOS Spectroscopic Redshift Survey) and 185.A-0791 (the VIMOS Ultra Deep Survey). A. K. and E. V. acknowledge support from the collaborative research center 956 (sub-project A1) funded by the Deutsche Forschungsgemeinschaft (DFG).
Datum i vrijeme pohrane2020-02-28 20:54:02