Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.143..339m&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 143, no. 2, April 1988, p. 339-348.
Astronomy and Astrophysics
Astrophysics
6
Astronomical Spectroscopy, Markarian Galaxies, Seyfert Galaxies, Spectrum Analysis, Starburst Galaxies, Active Galactic Nuclei, Emission Spectra, Forbidden Transitions, H Alpha Line, H Beta Line
Scientific paper
An ultraviolet-excess galaxy Markarian 313 (NGC 7465), which consists of a multiple system with NGC 7463 and NGC 7464, is studied using the low-resolution and high-resolution optical spectrum. Emission lines of H-alpha, H-beta, forbidden N II, and forbidden O III have conspicuous blueward asymmetrical wings or blue slanted profiles in the spectrum of the nuclear region of the galaxy. The width of these emission lines is as broad as about 600 km/s at the zero-intensity level, and the velocity difference between the narrow and broad components is estimated at around 80 km/s from the two-component Gaussian profile fitting. This fact could be evidence of a large-scale dynamical motion in or surrounding the nuclear region of the galaxy, implying that it bears intermediate characteristics between a Seyfert and a starburst galaxy.
Maehara Hideo
Noguchi Takeshi
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