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      https://www.ias.ac.in/article/fulltext/joaa/003/03/0351-0361

    • Keywords

       

      supernova remnants; birthrates

    • Abstract

       

      We have reanalysed a homogeneous catalogue of shell-type supernova remnants and we find that the radio data are consistent with a birthrate of one in 22±3 yr. Our approach is based on the secular decrease of surface brightness of the historical remnants whose ages are precisely known. The abovementioned birthrate is significantly higher than most previous estimates which range from one in 50–150 yr, and is consistent with the supernova rate in our galaxy derived from historical observations, as well as with recent estimates of the pulsar birthrate.

    • Author Affiliations

       

      G. Srinivasan1 K. S. Dwarakanath1

      1. Raman Research Institute, Bangalore - 560080
    • Dates

       
  • Journal of Astrophysics and Astronomy | News

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