Cloud structure in the galactic plane - A cosmic bubble bath

Details Cloud structure in the galactic plane - A cosmic bubble bath Cloud structure in the galactic plane - A cosmic bubble bath

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....38..363b&link_type=abstract

Astronomy and Astrophysics, vol. 38, no. 3, Feb. 1975, p. 363-371. Research supported by the Science Research Council.

Astronomy and Astrophysics

Astrophysics

45

Cosmic Dust, Galactic Structure, Interstellar Matter, Milky Way Galaxy, Supernova Remnants, Astronomical Photography, Filaments, Galactic Evolution, Galactic Radiation, H Ii Regions

Scientific paper

Evidence is presented for two types of structures in the interstellar medium: loops and dust filaments. H II regions showing well defined loop structures are described, and the presence and formation of dust shells in external galaxies are discussed. It is suggested that both types of structures can be explained as old supernova shells in various stages of dissipation and reentry to the galactic plane, with the dust component being formed either during supernova expansion or by Rayleigh-Taylor instability while falling into the plane. Twenty-eight possible shell structures are described, which have been observed as emission regions, absorption lanes, or radio features, and include Cyg 1 through 5, Mon 1 and 2, and Barnard's Loop (Ori 1).

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