Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sva....22..660m&link_type=abstract
(Astronomicheskii Zhurnal, vol. 55, Nov.-Dec. 1978, p. 1157-1162.) Soviet Astronomy, vol. 22, Nov.-Dec. 1978, p. 660-663. Trans
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Galactic Radiation, H Ii Regions, Interacting Galaxies, Nebulae, Absorbers (Materials), H Alpha Line, Mass, Radio Telescopes
Scientific paper
Absolute intensities of H-alpha line radiation from H II regions in the interacting galaxy NGC 4038/39 are determined photographically and compared with previous photographic and spectroscopic studies of the same galaxy. Satisfactory agreement is found only if the absorption in NGC 4038/39 amounts to more than 3 mag in H-beta. It is suggested that a substantial amount of the absorbing material should be concentrated in and near the H II regions. In this case, the total H-alpha luminosity would be around 3 x 10 to the 42nd erg/s, the mass of the H II regions would be about 100 million solar masses, and the mean absolute magnitudes of the superassociations of hot stars and their associated H II regions would be -18. It is concluded that such values are apparently possible in both a model of two interacting galaxies with a large quantity of gas and a model of a single object in which fragmentation is occurring.
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