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    • Diffuse radio emission from the Coma cluster of galaxies at decametre wavelengths

      Ch. V. Sastry R. K. Shevgaonkar

      Volume 4 Issue 1 March 1983 pp 47-51

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/004/01/0047-0051

    • Keywords

       

      cluster of galaxies; intracluster medium; radio spectra

    • Abstract

       

      We have observed the region of the Coma cluster at 34.5 MHz with a resolution of 26 arcmin × 40 arcmin. A map of the diffuse halo (Coma C) is presented. The size of the halo is found to be 54 arcmin × 30 arcmin. The position angle is 50° ± 10° and the integrated flux is 60 ± 11 Jy.

      We have also found an extended source to the south of Coma A. The measured half-power widths of this source are 30 arcmin × 40 arcmin. The position angle is 135° and the integrated flux is ~ 15 Jy at 34.5 MHz. The spectral index in the frequency range 408 to 34.5 MHz is -1.0. It is suggested that this source also belongs to the Coma cluster.

    • Author Affiliations

       

      Ch. V. Sastry1 2 R. K. Shevgaonkar1 2

      1. Indian Institute of Astrophysics, Bangalore - 560034
      2. Raman Research Institute, Bangalore - 560080

    • Dates

       
      Published
      March 1983
      Manuscript received
      17 September 1982
      Accepted
      14 February 1983

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