A Westerbork survey of clusters of galaxies. VII. Peculiar radio sources in the central region of Abell 1367.
Summary. Maps obtained with the Westerbork Synthesis Radio Telescope (WSRT) at 610 and t4t5 MHz of the cluster of galaxies A 1367 are presented. The properties of three peculiar radio sources detected in the central region of this cluster are discussed: a)The source associated with a bright spiral galaxy shows an asymmetrical extension (with a head tail appearance), which is interpreted as due to a dynamical interaction with the intracluster medium. b)The extended radio source identified with NGC 3842, the brightest member of the cluster, resembles a wide angle tail (WAT). The weak radio luminosity and the steepness of the spectra in its outer components, which is interpreted as the effect of the radiative losses revealed by the enhanced efficiency of the intracluster gas in radio source confinement, make this faint radio galaxy a possible example of WAT in a late evolutionary phase. c)A vast region of the cluster is filled by a low brightness radio "halo". The lack of radio galaxies in this region favours the idea that particle acceleration can occur in the intergalactic space itself. The implications of these observations on the physical conditions inside the cluster and the role played by the intergalactic medium are discussed. Key words: clusters of galaxies - radio galaxies intergalactic medium
Astronomy and Astrophysics
- Pub Date:
- October 1978
- Clusters of Galaxies:Intergalactic Matter;
- Clusters of Galaxies:Radio Sources