Ionized gases in the Galaxy - Survey of the H II, He II, C II, and S II interstellar regions

Details Ionized gases in the Galaxy - Survey of the H II, He II, C II, and S II interstellar regions Ionized gases in the Galaxy - Survey of the H II, He II, C II, and S II interstellar regions

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jrasc..80...16v&link_type=abstract

Journal of the Royal Astronomical Society of Canada (ISSN 0035-872X), vol. 80, Feb. 1986, p. 16-50. In French.

Astronomy and Astrophysics

Astronomy

2

Hydrogen Clouds, Interstellar Gas, Ionized Gases, Milky Way Galaxy, Molecular Clouds, Radio Sources (Astronomy), Galactic Structure, Hot Stars, Nebulae, Radio Jets (Astronomy), Recombination Reactions

Scientific paper

Aspects of the different types of hot ionized regions are compared, with emphasis on the difference in parameters between single-star source regions and multiple-star source regions. An examination of form and distribution reveals smaller diameters for small shell (0.001 pc), bipolar jet (0.1 pc), and champagne and blister (1 pc) types, than for shell (10 pc), interstellar bubble (100 pc), and complex giant (300 pc) types. The smaller structures generally display larger velocities of expansion than the larger structures, with a velocity separation at around 15 km/s. All have their source in O or B0 to B3 stars, and ionization masses range from 0.1 to 10 solar masses for the smaller types, and 10,000 to 10,000,000 solar masses for the larger types. Formation models are presented, and younger ages are found for the smaller regions than for the larger regions, with an age separation at around 10,000,000 years old.

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