• Gravitational pertubation of homogeneous collisionless dark matter

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/006/04/0247-0260

    • Keywords

       

      dark matter; collisionless; cluster of galaxies; dark matter; galaxies; rotation curves

    • Abstract

       

      The effect of a perturbing mass on a homogeneous collisionless cloud of dark matter is considered in the linear approximation. It is shown that gravitational potential can have turning points, in sharp contrast with gravitating systems of finite extent. The model offers a reasonable explanation for the observed secondary maxima in the density distribution of rich clusters. The relevance of the model to the flatness of the rotation curves of galaxies is also discussed.

    • Author Affiliations

       

      T. Padmanabhan1 M. M. Vasanthi1

      1. Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay - 400005
    • Dates

       
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