Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202..166r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 166-172.
Astronomy and Astrophysics
Astrophysics
28
Crab Nebula, Faraday Effect, Pulsars, Radio Scattering, Interstellar Space, Polarization Characteristics, Secular Variations, Supernova Remnants
Scientific paper
430 MHz polarization angle measurements of the Crab nebula pulsar are analyzed to determine the behavior of the Faraday rotation to the star over a six-year period. Both the Faraday rotation and dispersion measure (Isaacman and Rankin, 1977) variations appear to have the same form, suggesting that the former is produced by the latter in a region where the longitudinal component of the magnetic field is fairly constant at a value of about 150 - 200 μG. Fields of this magnitude are expected within the Crab nebula and in particular are thought to be associated with filaments, strengthening the possibility that the changes observed in the propagation conditions (that is, the dispersion, scattering and Faraday rotation variations) are all associated with a particular filament.
Campbell Donald B.
Isaacman Richard Bruce
Payne Robert R.
Rankin Joanna M.
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