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Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample
Astrophysical Journal, 759 (2012), 1; 30-43. https://doi.org/10.1088/0004-637X/759/1/30
Baloković, M.; Smolčić, Vernesa; Ivezić, Ž.; Zamorani, G.; Schinnerer, E.; Kelly, B. C.

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Baloković, M., Smolčić, V., Ivezić, Ž., Zamorani, G., Schinnerer, E. i Kelly, B. C. (2012). Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample. Astrophysical Journal, 759. (1), 30-43. doi: 10.1088/0004-637X/759/1/30

Baloković, M., et al. "Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample." Astrophysical Journal, vol. 759, br. 1, 2012, str. 30-43. https://doi.org/10.1088/0004-637X/759/1/30

Baloković, M., Vernesa Smolčić, Ž. Ivezić, G. Zamorani, E. Schinnerer i B. C. Kelly. "Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample." Astrophysical Journal 759, br. 1 (2012): 30-43. https://doi.org/10.1088/0004-637X/759/1/30

Baloković, M., et al. (2012) 'Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample', Astrophysical Journal, 759(1), str. 30-43. doi: 10.1088/0004-637X/759/1/30

Baloković M, Smolčić V, Ivezić Ž, Zamorani G, Schinnerer E, Kelly BC. Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample. Astrophysical Journal [Internet]. 2012. [pristupljeno 16.11.2024.];759(1):30-43. doi: 10.1088/0004-637X/759/1/30

M. Baloković, V. Smolčić, Ž. Ivezić, G. Zamorani, E. Schinnerer i B. C. Kelly, "Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample", Astrophysical Journal, vol. 759, br. 1, str. 30-43, 2012. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:633084. [Citirano: 16.11.2024.]

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Naslov (engleski)Disclosing the Radio Loudness Distribution Dichotomy in Quasars: An Unbiased Monte Carlo Approach Applied to the SDSS-FIRST Quasar Sample
AutorM. Baloković
AutorVernesa Smolčić
AutorŽ. Ivezić
AutorG. Zamorani
AutorE. Schinnerer
AutorB. C. Kelly
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Sažetak (engleski)
We investigate the dichotomy in the radio loudness distribution of quasars by modeling their radio emission and various selection effects using a Monte Carlo approach. The existence of two physically distinct quasar populations, the radio-loud and radio-quiet quasars, is controversial and over the last decade a bimodal distribution of radio loudness of quasars has been both affirmed and disputed. We model the quasar radio luminosity distribution with simple unimodal and bimodal distribution functions. The resulting simulated samples are compared to a fiducial sample of 8300 quasars drawn from the SDSS DR7 Quasar Catalog and combined with radio observations from the FIRST survey. Our results indicate that the SDSS-FIRST sample is best described by a radio loudness distribution which consists of two components, with (12 ± 1)% of sources in the radio-loud component. On the other hand, the evidence for a local minimum in the loudness distribution (bimodality) is not strong and we find that previous claims for its existence were probably affected by the incompleteness of the FIRST survey close to its faint limit. We also investigate the redshift and luminosity dependence of the radio loudness distribution and find tentative evidence that at high redshift radio-loud quasars were rarer, on average louder, and exhibited a smaller range in radio loudness. In agreement with other recent work, we conclude that the SDSS-FIRST sample strongly suggests that the radio loudness distribution of quasars is not a universal function, and that more complex models than presented here are needed to fully explain available observations.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaAstrophysical Journal
Brojčani podacivol. 759, br. 1, str. 30-43
p-ISSN0004-637X
e-ISSN1538-4357
DOIhttps://doi.org/10.1088/0004-637X/759/1/30
URN:NBNurn:nbn:hr:217:633084
Datum objave publikacije2012
URL dokumentahttp://dx.doi.org/10.1088/0004-637X/759/1/30
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Zaštićeno autorskim pravom.
Javna napomena© 2012 American Astronomical Society. Received 2011 January 18; accepted 2012 August 24; published 2012 October 15.
Datum i vrijeme pohrane2019-11-15 18:22:39