Repozytorium Uniwersytetu Jagiellońskiego

The radio and optical luminosity evolution of quasars. II. the SDSS sample

The radio and optical luminosity evolution of quasars. ...

Metadane (Dublin Core) Singal, J. pl Petrosian, V. pl Stawarz, Łukasz [SAP11018649] pl Lawrence, A. pl 2015-06-10T13:31:20Z 2015-06-10T13:31:20Z 2013 pl
dc.identifier.issn 0004-637X pl
dc.language eng pl
dc.title The radio and optical luminosity evolution of quasars. II. the SDSS sample pl
dc.type JournalArticle pl
dc.abstract.en We determine the radio and optical luminosity evolutions and the true distribution of the radio-loudness parameter \mathit{R}, defined as the ratio of the radio to optical luminosity, for a set of more than 5000 quasars combining Sloan Digital Sky Survey optical and Faint Images of the Radio Sky at Twenty cm (FIRST) radio data. We apply the method of Efron and Petrosian to access the intrinsic distribution parameters, taking into account the truncations and correlations inherent in the data. We find that the population exhibits strong positive evolution with redshift in both wavebands, with somewhat greater radio evolution than optical. With the luminosity evolutions accounted for, we determine the density evolutions and local radio and optical luminosity functions. The intrinsic distribution of the radio-loudness parameter \mathit{R} is found to be quite different from the observed one and is smooth with no evidence of a bimodality in radio loudness for log \mathit{R} \geqslant -1. The results we find are in general agreement with the previous analysis of Singal et al., which used POSS-I optical and FIRST radio data. pl
dc.subject.en galaxies: active pl
dc.subject.en galaxies: jets pl
dc.subject.en methods: data analysis pl
dc.subject.en methods: statistical pl
dc.subject.en quasars: general pl
dc.description.volume 764 pl
dc.description.number 1 pl
dc.identifier.doi 10.1088/0004-637X/764/1/43 pl
dc.identifier.eissn 1538-4357 pl
dc.title.journal The Astrophysical Journal pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.identifier.articleid 43 pl
dc.rights.original OTHER; inne; ostateczna wersja wydawcy; po opublikowaniu; 12; pl
.pointsMNiSW [2013 A]: 40

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