Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....90..246i&link_type=abstract
Astronomy and Astrophysics, vol. 90, no. 3, Oct. 1980, p. 246-268.
Astronomy and Astrophysics
Astrophysics
81
Galactic Structure, H Ii Regions, Intergalactic Media, Radio Observation, Star Formation, Magellanic Clouds, Radio Emission, Spatial Distribution, Stellar Evolution, Supernova Remnants, Thermal Radiation
Scientific paper
High-resolution radio maps of 14 late-type galaxies - the Sc galaxies M 33, IC 342, NGC 2403, NGC 4490, NGC 4631, NGC 4656, M 51, M 101, and NGC 6946; the Sbp galaxy NGC 4258 and the irregular dwarf galaxies SMC, LMC, NGC 1569 and NGC 4449 - are analysed to yield the properties of bright H II regions. The total sample contains 252 H II regions in 14 galaxies.
The brightest H II regions tend to be found at 40% of the de Vaucoaleurs radius; they are responsible for a considerable part of the total thermal emission of each galaxy. Estimates are given for the total amount of thermal emission and for the present rate of star formation in each galaxy; an estimate is also given for the number of supernova remnants expected to be present in the radio maps.
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