Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..33..441n&link_type=abstract
Astrophysics and Space Science, vol. 33, Apr. 1975, p. 441-451. Deutsche Forschungsgemeinschaft
Astronomy and Astrophysics
Astrophysics
6
Faraday Effect, Galactic Structure, Interstellar Magnetic Fields, Magnetic Field Configurations, Radio Galaxies, Angular Momentum, Magnetic Flux, Pulsars, Quasars, Solar System
Scientific paper
The autocorrelation function of Faraday rotation measures is discussed in terms of different types of galactic field configurations. The autocorrelation function evaluated from published data of 139 radio galaxies and quasars is found to resemble a form typical for a quasi-longitudinal field, whereas the autocorrelation function of 38 pulsars turns out to be of the form expected for a longitudinal field. These observations are interpreted with respect to the position of the solar system relative to the neutral sheet in a quasi-longitudinal field configuration. Rotation measures calculated theoretically using a mathematical formulation of the quasi-longitudinal field model are adapted to experimental data. The resulting 'polarity' of the global field structure is discussed in connection with the original dipole-like configuration the magnetic momentum vector of which is found to have been antiparallel to the angular momentum vector of the Galaxy. The relation between the field strength and the density of electrons is found to be consistent with earlier results.
Nissen D.
Thielheim Klaus Oswald
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