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    • Low-frequency observations of the Vela supernova remnant and their implications

      K. S. Dwarakanath

      Volume 12 Issue 3 September 1991 pp 199-211

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/012/03/0199-0211

    • Keywords

       

      Vela supernova remnant; Vela pulsar; SNR-PSR association

    • Abstract

       

      We have studied the Vela supernova remnant in the light of the 34.5 MHz observations made with the GEETEE low frequency array. The flux densities of Vela X and YZ at 34.5 MHz are estimated to be 1800 and 3900 Jy respectively. These values, along with those from earlier observations at higher frequencies, imply spectral indices (S∞Να) of-0.16 ± 0.02 for Vela X and -0.53 ± 0.03 for Vela YZ. This situation is further substantiated by the spectral-index distribution over the region obtained between 34.5 and 408 MHz.

      The spectral-index estimates, along with other known characteristics, strengthen the earlier hypothesis that Vela X is a plerion, while Vela YZ is a typical shell-type supernova remnant. We discuss the implications of this result.

    • Author Affiliations

       

      K. S. Dwarakanath1 2

      1. Raman Research Institute, Bangalore - 560080
      2. National Radio Astronomy Observatory, P.O. Box 0, Socorro, New Mexico, USA

    • Dates

       
      Published
      September 1991
      Manuscript received
      8 April 1991
      Accepted
      9 July 1991

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