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Constraining jet production scenarios by studies of narrow-line radio galaxies

Constraining jet production scenarios by studies of ...

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dc.contributor.author Sikora, Marek pl
dc.contributor.author Stasińska, Grażyna pl
dc.contributor.author Kozieł-Wierzbowska, Dorota [SAP11020074] pl
dc.contributor.author Madejski, Greg M. pl
dc.contributor.author Asari, Natalia V. pl
dc.date.accessioned 2015-06-10T14:28:49Z
dc.date.available 2015-06-10T14:28:49Z
dc.date.issued 2013 pl
dc.identifier.issn 0004-637X pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/9269
dc.language eng pl
dc.title Constraining jet production scenarios by studies of narrow-line radio galaxies pl
dc.type JournalArticle pl
dc.abstract.en We study a large sample of narrow-line radio galaxies (NLRGs) with extended radio structures. Using 1.4 GHz radio luminosities \mathit{L} _{1.4}, narrow optical emission line luminosities\mathit{L}_{\left [ O III \right ]} and \mathit{L}_{H \alpha}, as well as black hole masses \textup{BH} derived from stellar velocity dispersions measured from the optical spectra obtained with the Sloan Digital Sky Survey, we find that (1) NLRGs cover about four decades of the Eddington ratio, \lambda \equiv \mathit{L}_{bol}/\mathit{L}_{Edd} \alpha \mathit{L}_{line}/\mathit{M}_{\textup{BH}}; (2) \mathit{L}_{1.4}/\mathit{M}_{\textup{BH}} strongly correlates with \lambda; and (3) radio loudness, \emph{R} \equiv \mathit{L}_{1.4}/L_{\textup{line}}, strongly anti-correlates with \lambda. A very broad range of the Eddington ratio indicates that the parent population of NLRGs includes both radio-loud quasars (RLQs) and broad-line radio galaxies (BLRGs). The correlations they obey and their high jet production efficiencies favor a jet production model which involves the so-called magnetically choked accretion scenario. In this model, production of the jet is dominated by the Blandford–Znajek mechanism, and the magnetic fields in the vicinity of the central black hole are confined by the ram pressure of the accretion flow. Since large net magnetic flux accumulated in central regions of the accretion flow required by the model can take place only via geometrically thick accretion, we speculate that the massive, "cold" accretion events associated with luminous emission-line active galactic nucleus can be accompanied by an efficient jet production only if preceded by a hot, very sub-Eddington accretion phase. pl
dc.subject.en accretion pl
dc.subject.en accretion disks pl
dc.subject.en galaxies: jets pl
dc.subject.en magnetic fields pl
dc.description.volume 765 pl
dc.description.number 1 pl
dc.identifier.doi 10.1088/0004-637X/765/1/62 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 62 pl
dc.rights.original OTHER; otwarte czasopismo; ostateczna wersja wydawcy; po opublikowaniu; 12 pl
.pointsMNiSW [2013 A]: 40


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