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Faraday rotation measure variations in the Cygnus region and the spectrum of interstellar plasma turbulenceLinear 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.
Document ID
19910028043
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lazio, T. Joseph
(Iowa Univ. Iowa City, IA, United States)
Spangler, Steven R.
(Iowa, University Iowa City, United States)
Cordes, James M.
(Cornell University; National Astronomy and Ionosphere Center Ithaca, NY, United States)
Date Acquired
August 14, 2013
Publication Date
November 10, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 363
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A12666
Funding Number(s)
CONTRACT_GRANT: NSF AST-85-20530
CONTRACT_GRANT: NAGW-806
CONTRACT_GRANT: NAGW-831
Distribution Limits
Public
Copyright
Other

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