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    • Manifestations of Magnetic Field Inhomogeneities

      Lawrence Rudnick

      Volume 32 Issue 4 December 2011 pp 549-555

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/032/04/0549-0555

    • Keywords

       

      Radiation mechanisms: nonthermal; galaxies: clusters; magnetic fields.

    • Abstract

       

      Both observations and simulations reveal large inhomogeneities in magnetic field distributions in diffuse plasmas. Incorporating these inhomogeneities into various calculations can significantly change the inferred physical conditions. In extragalactic sources, e.g., these can compromise analyses of spectral ageing, which I will illustrate with some current work on cluster relics. I also briefly re-examine the old issue of how inhomogeneous fields affect particle lifetimes; perhaps not surprisingly, the next generation of radio telescopes are unlikely to find many sources that can extend their lifetimes from putting relativistic electrons into a low-field ‘freezer’. Finally, I preview some new EVLA results on the complex relic in Abell 2256, with implications for the interspersing of its relativistic and thermal plasmas.

    • Author Affiliations

       

      Lawrence Rudnick1

      1. University of Minnesota, Minneapolis, MN 55455, USA

    • Dates

       
      Published
      December 2011

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