Markarian 313: An intermediate object between a seyfert and a starburst galaxy |
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| Authors: | Hideo Maehara Takeshi Noguchi |
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| Institution: | (1) Tokyo Astronomical Observatory, University of Tokyo, Mitaka, Tokyo, Japan |
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| Abstract: | 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- and high-resolution optical spectrum. Emission lines of H , H , NII], and OIII] 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  600 km s–1 at the zero-intensity level, and the velocity difference between the narrow and broad components is estimated at around 80 km s–1 from the two-component Gaussian profile fitting. This fact could be an evidence of a large-scale dynamical motion in or surrounding the nuclear region of the galaxy, implying that it bears an intermediate characteristic between a Seyfert and a starburst galaxy. |
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