Physics
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ap%26ss..31..225p&link_type=abstract
Astrophysics and Space Science, vol. 31, Nov. 1974, p. 225-240.
Physics
6
Field Theory (Physics), Galactic Evolution, Interstellar Magnetic Fields, Magnetic Effects, Spiral Galaxies, Stellar Evolution, Stellar Systems, Elliptical Galaxies, Gas Density, Globular Clusters, Gravitational Fields, Hubble Diagram, Milky Way Galaxy, Radio Galaxies, Star Clusters
Scientific paper
It is confirmed that the creation of stars in spiral (and perhaps also Irr I) galaxies requires a physical parameter (X factor) additional to gas density. Consequently the X factor is an essential feature of stellar patterns and perhaps of stellar systems (spiral and other disk and spheroidal systems, globular clusters) and may be the key to the origin of the few, yet remarkably varied Hubble types of galaxies. It is shown that the X factor is organized over the whole galaxy and is a function of azimuth as well as radius. Only a galaxy-wide force field seems capable of explaining such an X factor, either magnetic or gravitational in origin.
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