Journal Article

CGCG 292−057 – a radio galaxy with merger-modulated radio activity

D. Kozieł-Wierzbowska, M. Jamrozy, S. Zola, G. Stachowski and A. Kuźmicz

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 422, issue 2, pages 1546-1551
Published in print May 2012 | ISSN: 0035-8711
Published online April 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.20727.x
CGCG 292−057 – a radio galaxy with merger-modulated radio activity

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We announce the discovery of a unique combination of features in a radio source identified with the merger galaxy CGCG 292−057. The radio galaxy both exhibits a highly complex, X-like structure and shows signs of recurrent activity in the form of double–double morphology. The outer lobes of CGCG 292−057 are characterized by low radio power, P1400 MHz≃ 2 × 1024 W Hz−1, placing this source below the FR II/FR I luminosity threshold, and are highly polarized (almost 20 per cent at 1400 MHz) as is typical of X-shaped radio sources. The host is a low-ionization nuclear emission-line region-type galaxy with a relatively low black hole mass and double-peaked narrow emission lines. These features make this galaxy a primary target for studies of merger-triggered radio activity.

Keywords: galaxies: active; galaxies: individual: CGCG 292−057; galaxies: nuclei; galaxies: structure; radio continuum: galaxies

Journal Article.  4665 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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