Westerbork 5 GHz observations of head-tail radio sources in A2022, A2256, and A2462

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Abstract

A 5 GHz study was carried out to study the fine-structure of five head-tail radio sources detected in three clusters: A2022, A2256, and A2462. The pattern of the trail deduced from a combination of observations of A2022 at three different frequencies is analyzed. It is noted that the observed widening of the tail is close to what is expected in the local Hubble expansion, for a relatively low galaxy velocity of 75 km/sec. The head-tail radio source C in A2256 is still unresolved at 5 GHz. Assuming the radio source to be confined by the intergalactic medium, a high value of the density and temperature product for the intergalactic medium in this cluster is implied. The complex radio source in A2462 has been identified with a dominant E galaxy, and a compact object, close to the galaxy on a photographic plate, has been detected as well. The complex is either a head-tail radio source or a more complicated structure possibly resulting from a precessing beam.
Original languageEnglish
Pages (from-to)53-58
JournalAstronomy and astrophysics
Volume102
Issue number1
Publication statusPublished - 1-Sep-1981

Keywords

  • Astronomical Maps
  • Extragalactic Radio Sources
  • Galactic Structure
  • Microwave Emission
  • Radio Astronomy
  • Fine Structure
  • Galactic Nuclei
  • Hubble Constant
  • Intergalactic Media

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