Size distributions of H II regions in galaxies. - Spiral Galaxies

Details Size distributions of H II regions in galaxies. - Spiral Galaxies Size distributions of H II regions in galaxies. - Spiral Galaxies

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..915h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, Sept. 1987, p. 915-920.

Statistics

Computation

33

H Alpha Line, H Ii Regions, Image Tubes, Spiral Galaxies, Stellar Luminosity, Computational Astrophysics, Photomaps, Size Distribution

Scientific paper

The size distributions of the H II regions in 21 nearby spiral galaxies are determined from Hα image-tube plates. Almost all integral diameter distributions fit an exponential law, as found for irregular galaxies in Paper I. There is a strong correlation between the luminosity of a galaxy and the slope of the diameter distribution. The slope is shallower in the spiral arms and there is a weak tendency for it to be shallower also in the outer parts of a galaxy.

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