000095451 001__ 95451
000095451 005__ 20240122154814.0
000095451 0247_ $$2doi$$a10.1093/mnras/stv710
000095451 0248_ $$2sideral$$a109953
000095451 037__ $$aART-2015-109953
000095451 041__ $$aeng
000095451 100__ $$aSulentic, Jack W.
000095451 245__ $$a3C 57 as an atypical radio-loud quasar: implications for the radio-loudradio-quiet dichotomy
000095451 260__ $$c2015
000095451 5060_ $$aAccess copy available to the general public$$fUnrestricted
000095451 5203_ $$aLobe-dominated radio-loud (LD RL) quasars occupy a restricted domain in the 4D Eigenvector 1 (4DE1) parameter space which implies restricted geometry/physics/kinematics for this subclass compared to the radio-quiet (RQ) majority of quasars. We discuss how this restricted domain for the LD RL parent population supports the notion for a RQ-RL dichotomy among type 1 sources. 3C 57 is an atypical RL quasar that shows both uncertain radio morphology and falls in a region of 4DE1 space where RL quasars are rare. We present new radio flux and optical spectroscopic measures designed to verify its atypical optical/UV spectroscopic behaviour and clarify its radio structure. The former data confirms that 3C 57 falls off the 4DE1 quasar ''main sequence'' with both extreme optical Fe II emission (RFe II ~ 1) and a large CIV λ1549 profile blueshift (~-1500 km s<sup>-1</sup>). These parameter values are typical of extreme Population A sources which are almost always RQ. New radio measures show no evidence for flux change over a 50+year time-scale consistent with compact steep-spectrum (or young LD) over core-dominated morphology. In the 4DE1 context where LD RL are usually low L/L<inf>Edd</inf> quasars, we suggest that 3C 57 is an evolved RL quasar (i.e. large blackhole mass) undergoing a major accretion event leading to a rejuvenation reflected by strong Fe II emission, perhaps indicating significant heavy metal enrichment, high bolometric luminosity for a low-redshift source and resultant unusually high Eddington ratio giving rise to the atypical CIV λ1549.
000095451 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/AYA2010-15169$$9info:eu-repo/grantAgreement/ES/MICINN/AYA2011-1544-E$$9info:eu-repo/grantAgreement/ES/MICINN/AYA2013-42227-P
000095451 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000095451 590__ $$a4.952$$b2015
000095451 591__ $$aASTRONOMY & ASTROPHYSICS$$b13 / 62 = 0.21$$c2015$$dQ1$$eT1
000095451 592__ $$a2.701$$b2015
000095451 593__ $$aSpace and Planetary Science$$c2015$$dQ1
000095451 593__ $$aAstronomy and Astrophysics$$c2015$$dQ1
000095451 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000095451 700__ $$0(orcid)0000-0002-7374-3222$$aMartínez Carballo, M. A.
000095451 700__ $$aMarziani, P.
000095451 700__ $$aOlmo, Ascensión del
000095451 700__ $$aStirpe, G.M.
000095451 700__ $$aZamfir, S.
000095451 700__ $$aPlauchu-Frayn, I.
000095451 773__ $$g450, 2 (2015), 1916-1925$$pMon. not. R. Astron. Soc.$$tMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY$$x0035-8711
000095451 8564_ $$s436114$$uhttps://zaguan.unizar.es/record/95451/files/texto_completo.pdf$$yVersión publicada
000095451 8564_ $$s476638$$uhttps://zaguan.unizar.es/record/95451/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000095451 909CO $$ooai:zaguan.unizar.es:95451$$particulos$$pdriver
000095451 951__ $$a2024-01-22-15:32:44
000095451 980__ $$aARTICLE