Mathematics – Logic
Scientific paper
Aug 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977afz....13..415k&link_type=abstract
Astrofizika, vol. 13, Aug. 1977, p. 415-426. In Russian.
Mathematics
Logic
13
Astronomical Spectroscopy, Galactic Structure, Active Galaxies, Astronomical Catalogs, Balmer Series, Electron Density (Concentration), Emission Spectra, Galactic Nuclei, Morphology, Spectrophotometry, Stellar Evolution, Ultraviolet Radiation
Scientific paper
Results are reported for a detailed spectrophotometric and morphological study of NGC 6306, a galaxy having a UV excess in its spectrum. This galaxy is found to consist of several bright condensations exhibiting a strong emission spectrum. However, various higher members of the hydrogen Balmer series are observed in absorption. Line profiles and equivalent widths are presented, and an electron density of the order of 1000 per cu cm is estimated for certain central regions of the galaxy from the intensity ratio of the forbidden S II lines at 6731 and 6717 A. The radial-velocity differences between selected regions of the galaxy are determined. It is concluded that NGC 6306 is a very active galaxy in which violent star-formation processes are occurring, and it is noted that NGC 6306 is physically associated with NGC 6307, which shows no signs of activity.
Kazarian M. A.
Khachikian E. E.
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