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Double-double radio galaxies from the FIRST survey

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arxiv 1208.1941 v1 pith:KUSJK5RA submitted 2012-08-09 astro-ph.CO astro-ph.GA

classification astro-ph.COastro-ph.GA
keywords radiosourcesddrgsdouble-doublegalaxiesbeenexaminedfirst
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The radio structures and optical identifications of a sample of 242 sources classified as double-double radio sources by Proctor (2011) from a morphological study of sources in the FIRST (Faint Images of the Radio Sky at Twenty centimeters) survey (2003 April release, 811,117 entries) have been examined. We have been able to confirm only 23 of these as likely to be double-double radio galaxies (DDRGs), whose structures could be attributed to episodic nuclear activity in their host galaxies. A further 63 require either higher-resolution radio observations or optical identifications to determine whether these are DDRGs. The remaining sources are unlikely to be DDRGs. We have examined the luminosities, sizes and symmetry parameters of the DDRGs and the constraints these place on our understanding of these sources.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Spectral signatures of young radio galaxies

    astro-ph.GA 2024-12 conditional novelty 6.0 of 10

    In simulations, young radio galaxies interacting with a clumpy interstellar medium can mimic double-double restarted sources, and their radio spectral turnover frequency traces ISM density independent of jet power.

  2. What is Inside the Double-Double Structure of the Radio Galaxy J0028+0035?

    astro-ph.GA 2025-01 accept novelty 5.0 of 10

    VLBI imaging at 1.66 GHz shows the core of the double-double radio galaxy J0028+0035 is a single compact source, ruling out a third pair of innermost lobes, and indicates the nearby blazar candidate 5BZU J0028+0035 is...

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