Model rotation curves of disk galaxies oriented at an arbitrary angle to the plane of the sky |
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Authors: | K V Stepanova E V Volkov |
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Institution: | 19347. St. Petersburg State University, Universitetski pr. 28, St. Petersburg, 198504, Russia
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Abstract: | We consider the effects of projection, absorption, and velocity dispersion on the shape of the rotation curve for a galaxy as a function of its disk inclination to the plane of the sky. We conclude that for galaxies with a fairly massive compact bulge these effects lead to a marked discrepancy between the rotation curve and the circular velocity curve even if their disks are viewed far from edge-on, especially for the rotation curves constructed from observations of the stellar component. |
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