NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-26 T10:27:28 PDT
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For refcode 2004MNRAS.351.1247K:
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Copyright by Royal Astronomical Society. 2004MNRAS.351.1247K Structure and kinematics of edge-on galaxy discs - I. Observations of the stellar kinematics Kregel, M.; van der Kruit, P. C.; Freeman, K. C. Abstract. We present deep optical long-slit spectra of 17 edge-on spiral galaxies of intermediate to late morphological type, mostly parallel to their major axes and in a few cases parallel to the minor axes. The line-of-sight stellar kinematics are obtained from the stellar absorption lines using the improved cross-correlation technique. In general, the stellar kinematics are regular and can be traced well into the disc-dominated region. The mean stellar velocity curves are far from solid-body, indicating that the effect of dust extinction is not large. The line-of-sight stellar disc velocity dispersion correlates with the galaxy maximum rotational velocity, but detailed modelling is necessary to establish whether this represents a physical relation. In four spirals with a boxy- or peanut-shaped bulge we are able to detect asymmetric velocity distributions, having a common signature with projected radius in the mean line-of-sight velocity and the h_3_ and h_4_ curves. In two cases this kinematic asymmetry probably represents the 'figure-of-eight' pattern synonymous with a barred potential. We emphasize, however, that the signatures seen in the h_3_ and h_4_ curves may also be due to the disc seen in projection. Keywords: galaxies: fundamental parameters, galaxies: kinematics and dynamics, galaxies: spiral, galaxies: structure
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