Faraday rotation measure variations in the Cygnus region and the spectrum of interstellar plasma turbulence

Details Faraday rotation measure variations in the Cygnus region and the spectrum of interstellar plasma turbulence Faraday rotation measure variations in the Cygnus region and the spectrum of interstellar plasma turbulence

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...363..515l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 363, Nov. 10, 1990, p. 515-527. Research supported by the Alfred P. Sloan F

Astronomy and Astrophysics

Astronomy

32

Cosmic Plasma, Cygnus Constellation, Faraday Effect, Plasma Turbulence, Radio Galaxies, Astronomical Spectroscopy, Interstellar Magnetic Fields, Interstellar Matter, Linear Polarization, Rotating Bodies

Scientific paper

Linear polarization observations were made of eight double-lobed radio galaxies viewed through the galactic plane in the Cygnus region. These observations have been used to determine intra- and intersource rotation measure differences; in some cases, unambiguous rotation measures have been extracted. The rotation measures are dominated by foreground magnetoionic material. The differences in rotation measure between pairs of sources correlate with angular separation for separations from 10 arcsec to 1.5 deg. These rotation measure fluctuations are consistent with a model in which the electron density varies on roughly 0.1-200 pc scales. The amplitudes of these variations are, in turn, consistent with those electron density variations that cause diffractive interstellar scattering on scales less than 10 to the 11th cm.

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