VLA Imaging of Fanaroff-Riley II 3CR Radio Galaxies.II.Eight New Images and Comparisons with 3CR Quasars

Fernini, Ilias; Burns, Jack O.; Perley, R. A.

doi:10.1086/118649

Cited by 49 publications

(49 citation statements)

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“…However, there is no unambiguous counter-jet in any of these sources. In a similar study of a sample of 13 radio galaxies by Fernini et al (1993Fernini et al ( , 1997, only two have radio jets and neither of these show evidence of any counter jet. Although radio jets are not frequently detected in FRII radio galaxies, two of the good examples of counter-jets seen in FRII radio sources are associated with relatively nearby radio galaxies.…”

Section: Introductionmentioning

confidence: 94%

B1524-136: A CSS quasar with two-sided radio jets

Mantovani

Saikia

Bondì

et al. 2002

A&A

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Abstract. We present MERLIN, global VLBI and VLBA observations of the high-luminosity, compact steepspectrum quasar B1524−136 at cm wavelengths. These observations reveal well-defined radio jets on both sides of the active nucleus, a situation which is almost unique amongst high-luminosity radio quasars. However, the radio jets on opposite sides are very dissimilar, and the overall radio structure appears highly distorted. We discuss possible implications of these observations.

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Section: Introductionmentioning

confidence: 94%

B1524-136: A CSS quasar with two-sided radio jets

Mantovani

Saikia

Bondì

et al. 2002

A&A

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“…Extensive radio-imaging studies by e.g., Hough & Readhead (1989), Hough et al (1999), Bridle et al (1994), Fernini et al (1993Fernini et al ( , 1997, Dennett-Thorpe et al (1997 and most recently Mullin et al (2008) have yielded broad agreement with the orientation-dependent unification scheme, but the abovementioned studies also found evidence for radio source environmental effects. Consistency with aspect-dependent unification was also found in optical and infrared studies of the AGN and their host galaxies (e.g., Ogle et al 1997;Dunlop et al 2003;Haas et al 2004Haas et al , 2005.…”

Section: Introductionmentioning

confidence: 95%

The asymmetric radio structure and record jet of giant quasar 4C 34.47

Hocuk

Barthel

2010

A&A

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Context. Unification models for active galactic nuclei, AGN, predict that all quasars (radio sources associated with quasi-stellar objects) should be at a substantial angle with the sky plane. Aims. We test the predictions of the orientation unification model with the morphological and polarization properties of a giant quasar. Methods. The giant double-lobed radio source 4C 34.47, which is associated with quasi-stellar object B1721+343, is mapped at arcsecond scale resolution, and the data are subsequently analyzed within the context of current models for extragalactic radio sources. Results. Quasar 4C 34.47 displays a straight one-sided jet, measuring a record length of 380 kpc in its double-lobed radio structure. Assuming an intrinsically symmetric two-sided jet structure the radio source jet axis must be at least 33 • away from the sky plane, that is within 57 • from the line of sight. The radio polarization properties indicate that this giant source has largely outgrown the depolarizing halo that is generally associated with the host galaxies of powerful radio sources. The measured small depolarization asymmetry nevertheless agrees with its inferred orientation. Conclusions. All data for this giant radio source agree with its preferred orientation as predicted within the unification scheme for powerful radio sources. Seen under a small aspect angle the radio source is large, but not excessively large. The global properties of 4C 34.47 do not differ from other giant (old) FR2 radio sources: it is a slowly expanding low-luminosity radio source.

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“…I visually inspected the images of double-lobed radio sources published in Black et al (1992), Lonsdale et al (1993), Price et al (1993), Bogers et al (1994), Bridle et al (1994), Law-Green et al (1995), Neff et al (1995), Reid et al (1995Reid et al ( , 1999, Fernini et al (1997), Hardcastle et al (1997), Harvanek & Hardcastle (1998), Riley et al (1999), Gilbert et al (2004, hereafter G04), Fernini (2007, and Kharb et al (2008) to find objects meeting these criteria. It turned out that only two sources -3C 249.1 and 3C 334 -clearly met them, so they are discussed in detail below.…”

Section: In Quest Of J1211+743 Analoguesmentioning

confidence: 99%

Are 3C 249.1 and 3C 334 restarted quasars?

Marecki

2012

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This Research Note follows up a Letter in which I posit that J1211+743 is a restarted radio source. This means that its structure, where the jet points to the relic lobe, is only apparently paradoxical. Here, I propose the same scenario and apply the same mathematical model to 3C 249.1 and 3C 334. The ultimate result of my investigation is that these two well-known radio-loud quasars can be understood best so far if it was assumed that they, too, had been restarted.

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VLA Imaging of Fanaroff-Riley II 3CR Radio Galaxies.II.Eight New Images and Comparisons with 3CR Quasars

Cited by 49 publications

References 0 publications

B1524-136: A CSS quasar with two-sided radio jets

B1524-136: A CSS quasar with two-sided radio jets

The asymmetric radio structure and record jet of giant quasar 4C 34.47

Are 3C 249.1 and 3C 334 restarted quasars?

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