Large-scale formation of massive stars in the spiral galaxy NGC 4321

Details Large-scale formation of massive stars in the spiral galaxy NGC 4321 Large-scale formation of massive stars in the spiral galaxy NGC 4321

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...234...23a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 234, no. 1-2, Aug. 1990, p. 23-39. Research supported by NSERC.

Astronomy and Astrophysics

Astrophysics

27

Spiral Galaxies, Star Formation, Stellar Mass, Astronomical Models, Fabry-Perot Interferometers, Galactic Evolution, H Alpha Line, H Ii Regions, Virgo Galactic Cluster

Scientific paper

Fabry-Perot observations at H-alpha of the Virgo spiral galaxy NGC 4321 are presented, obtained at the Canada-France-Hawaii Telescope. Luminosities, diameters and velocity widths have been measured for 127 giant H II regions in the galaxy. The integral diameter function is well described by an exponential function, and the power index of the luminosity function is 1.38. The population of the 31 H II regions with the highest surface brightness in NGC 4321 reproduces the known correlations observed for the first-ranked H II regions in galaxies between luminosities, diameters and velocity widths.

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