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    • Keywords


      Cosmic rays; galaxies: clusters: individual: Coma A1367, general; diffuse radiation; gamma rays: theory.

    • Abstract


      The origin of extragalactic diffuse gamma ray is not accurately known, especially because our suggestions are related to many models that need to be considered either to compute the galactic diffuse gamma ray intensity or to consider the contribution of other extragalactic structures while surveying a specific portion of the sky. More precise analysis of EGRET data however, makes it possible to estimate the diffuse gamma ray in Coma supercluster (i.e., Coma\A1367 supercluster) direction with a value of 𝐼(𝐸 > 30MeV) ≃ 1.9 × 10-6 cm-2 s-1, which is considered to be an upper limit for the diffuse gamma ray due to Coma supercluster. The related total intensity (on average) is calculated to be ∼ 5% of the actual diffuse extragalactic background. The calculated intensity makes it possible to estimate the origin of extragalactic diffuse gamma ray.

    • Author Affiliations


      Pantea Davoudifar1 S. Jalil Fatemi2

      1. Research Institute for Astronomy and Astrophysics of Maragha, Maragha 55177-36698, Iran.
      2. Physics Department, Shahid Bahonar University of Kerman, Kerman 76175-132, Iran.
    • Dates

  • Journal of Astrophysics and Astronomy | News

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