• Vinod Krishan

      Articles written in Pramana – Journal of Physics

    • High energy universe — Satellite missions

      Vinod Krishan

      More Details Abstract Fulltext PDF

      A variety of satellite missions to observe the high energy universe are currently operating and some more with more versatility and capability are on the anvil. In this paper, after giving a brief introduction to the constituents of the high energy universe and the related plasma physical problems, general as well as specific features of the current and future x-ray and gamma-ray satellite missions are described.

    • Effect of radiative cooling on collapsing charged grains

      BP Pandey Vinod Krishan M Roy

      More Details Abstract Fulltext PDF

      The effect of the radiative cooling of electrons on the gravitational collapse of cold dust grains with fluctuating electric charge is investigated. We find that the radiative cooling as well as the charge fluctuations, both, enhance the growth rate of the Jeans instability. However, the Jeans length, which is zero for cold grains and nonradiative plasma, becomes finite in the presence of radiative cooling of electrons and is further enhanced due to charge fluctuations of grains resulting in an increased threshold of the spatial scale for the Jeans instability.

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