Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979afz....15..577a&link_type=abstract
(Astrofizika, vol. 15, Oct.-Dec. 1979, p. 577-588.) Astrophysics, vol. 15, no. 4, Apr. 1980, p. 388-395. Translation.
Astronomy and Astrophysics
Astrophysics
5
Astronomical Photometry, Galactic Radiation, Galactic Structure, Spectrophotometry, Absorption Spectra, Early Stars, Emission Spectra, Line Spectra, Spectrographs
Scientific paper
The results are given of detailed spectrophotometry of the galaxies NGC 972 and NGC 4433. The observational material was obtained with the 107 in. telescope at the McDonald Observatory with the spectrograph UVITS with dispersion 225 A/mm and the 200 in. telescope at the Hale Observatories with Cassegrian spectrograph and dispersion 85 A/mm. The equivalent widths and relative intensities of the lines in the spectra of NGC 972 and NGC 4433 were determined. It is concluded that there are in these galaxies stars of early spectral classes and gas clouds with a low level of excitation and low density. It is assumed that the stars and the gas belong to common physical systems, forming superassociations. In the central part of NGC 972 and NGC 4433 there are regions which emit strongly in the continuum.
Andreasian N. K.
Khachikian E. E.
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