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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/002/02/0133-0139

    • Keywords

       

      Sun; small scale magnetic fields; granules; downdrafts; fluid dynamics; unsteady one-dimensional flow

    • Abstract

       

      The time-dependent interaction of the granulation velocity field with a magnetic flux tube is investigated here. It is seen that when a magnetic field line is displaced normal to itself so as to simulate thebuffeting action of granules, a flow of gas is initiated along the field. By choosing a lateral velocity field which is consistent with observations of granules, it is found that the resulting gas motion is a downward flow with a velocity compatible with the observed downflow in isolated photospheric flux tubes. It is therefore proposed that the observed photospheric downflow is a manifestation of the interaction of granules with flux tubes.

    • Author Affiliations

       

      P. Venkatakrishnan1 S. S. Hasan1

      1. Indian Institute of Astrophysics, Bangalore - 560034
    • Dates

       
  • Journal of Astrophysics and Astronomy | News

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      Posted on January 27, 2016

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