Statistical properties of H II regions

Details Statistical properties of H II regions Statistical properties of H II regions

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989rmxaa..18..115d&link_type=abstract

(Universidad Nacional Autonoma de Mexico and CONACYT, Conferencia Mexicana-Texana de Astrofisica, 2nd, Mexico City, MX, Feb. 22-

Astronomy and Astrophysics

Astronomy

Galactic Evolution, H Ii Regions, Metallicity, Star Formation, Statistical Analysis, Charge Coupled Devices, Giant Stars, Supergiant Stars, Ultraviolet Telescopes

Scientific paper

McCall et al.'s (1985) analysis of observations of 99 H II regions in galaxies of various metallicities has revealed that G and SG H II regions form a two-parameter family encompassing the metallicity and the age. CCD images of NGC 2442 indicate that the effect of evolution is present when a large number of H II regions is analyzed. For that galaxy, a gradient of -0.05 dex/kpc is obtained; this corresponds to an intercept of forbidden O III/H-beta of -0.15. A comparison of these data with those for NGC 2992 shows that CCD, narrowband filters, and comparatively small telescopes are suitable for this type of work.

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