Manifestations of Magnetic Field Inhomogeneities

Lawrence Rudnick

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)549-555
Number of pages7
JournalJournal of Astrophysics and Astronomy
Volume32
Issue number4
DOIs
StatePublished - Dec 1 2011

Keywords

  • galaxies: clusters
  • magnetic fields
  • Radiation mechanisms: nonthermal

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