Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242...74s&link_type=abstract
Astrophysical Journal, Part 1, vol. 242, Nov. 15, 1980, p. 74-94. Research supported by the Natural Sciences and Engineering Re
Astronomy and Astrophysics
Astrophysics
225
Faraday Effect, Galactic Rotation, Interstellar Magnetic Fields, Milky Way Galaxy, Extragalactic Radio Sources, Hydrogen Clouds, Magnetic Anomalies, Polarization Characteristics, Pulsars
Scientific paper
The analysis of a new, large sample of extragalactic source rotation measures (RMs) provides firm evidence for large-scale prevailing magnetic fields in the Galaxy. Several regions of strong galactic RM are identified, and their boundaries in (l, b) are well delineated for the first time. The largest feature dominates the RM sky; it is centered southward of the galactic plane at l = 90 deg and extends as far as b = 40 deg. It is shown that low RMs at high galactic latitudes are well correlated in sign over large angular scales (about 30 deg), and that they are influenced by the larger-scale prevailing magnetic fields. Various models of the prevailing magnetic field in the plane of the Galaxy are discussed; a bisymmetric spiral field model is proposed in which the prevailing magnetic field sense reverses at or near the Sagittarius arm. The effect of galactic loop I appears to cause a weak, large-scale modulation of the RMs at positive galactic latitudes.
Kronberg Philipp P.
Simard-Normandin M.
No associations
LandOfFree
Rotation measures and the galactic magnetic field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Rotation measures and the galactic magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotation measures and the galactic magnetic field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1390386