Faraday rotation measure irregularities through the supernova remnant CTA 1 - A site of enhanced interstellar plasma turbulence

Details Faraday rotation measure irregularities through the supernova remnant CTA 1 - A site of enhanced interstellar plasma turbulence Faraday rotation measure irregularities through the supernova remnant CTA 1 - A site of enhanced interstellar plasma turbulence

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...386..170s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 386, Feb. 10, 1992, p. 170-180.

Statistics

Computation

11

Cosmic Plasma, Faraday Effect, Magnetohydrodynamic Turbulence, Supernova Remnants, Computational Astrophysics, Interstellar Magnetic Fields, Linear Polarization, Very Large Array (Vla)

Scientific paper

The hypothesis that supernovae generate the plasma turbulence that scatters radio waves is tested by means of a probing of Faraday rotation measure (RM) irregularities within and near the remnant CTA 1. VLA observations were made of four extragalactic radio sources seen through CTA 1, and of five extragalactic sources on lines of sight outside but near the remnant. Two sets of sources are intrinsically similar. Outside CTA 1 the RM structure function, intrasource and intersource (Delta-RM)-squared vs angular separation, is consistent with the result for general lines of sight at high galactic latitude. Small angular-scale RM irregularities are found to be stronger through CTA 1: this remnant is a site of enhanced plasma turbulence. It is concluded that, collectively, supernovae may be at least partly responsible for the widespread large scale-height turbulence.

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