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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/081/06/1037-1043

    • Keywords

       

      Protostar; magnetic field generation; dynamo.

    • Abstract

       

      In this paper, we estimate the magnetic Reynolds number of a typical protostar before and after deuterium burning, and claim for the existence of dynamo process in both the phases, because the magnetic Reynolds number of the protostar far exceeds the critical magnetic Reynolds number for dynamo action. Using the equipartition of kinetic and magnetic energies, we estimate the steady-state magnetic field of the protostar to be of the order of kilogauss, which is in good agreement with observations.

    • Author Affiliations

       

      Mahendra K Verma1 Bidya Binay Karak2 3 Rohit Kumar1

      1. Department of Physics, Indian Institute of Technology, Kanpur 208 016, India
      2. Department of Physics, Indian Institute of Science, Bangalore 560 012, India
      3. Nordita KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden

    • Dates

       
      Published
      December 2013
      Manuscript received
      13 April 2013
      Manuscript revised
      16 September 2013
      Accepted
      3 October 2013
      Early published
      23 November 2013

  • Pramana – Journal of Physics | News

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