Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..80..457p&link_type=abstract
Astrophysics and Space Science, vol. 80, no. 2, Dec. 1981, p. 457-471.
Astronomy and Astrophysics
Astrophysics
24
Galactic Evolution, Intergalactic Media, Interstellar Magnetic Fields, Magnetic Flux, Spiral Galaxies, Astronomical Models, Density Wave Model, Galactic Clusters, Hubble Diagram, Star Clusters, Star Distribution, Stellar Evolution, Stellar Gravitation
Scientific paper
Evidence for a universal magnetic field of strength 10 to the -9th to 10 to the -8th is reviewed, and is extended to include the diffuse fields of galactic clusters and extensive magnetic halos of spiral galaxies. Likely effects of the universal field on the evolutionary patterns of gas and stars are discussed, and include the origin of the Hubble sequence of varied galactic forms which may be explained in terms of different angles between the universal field and the rotational axis of the protogalaxy. Magnetic halos of some spiral galaxies are nearly spherical in form and enclose the whole of the optical disk. In addition, further confirmation is provided to support the idea that the grand-design gaseous spiral arms of the M51-type galaxies result from tidal interaction.
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