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astro-ph2004
Beyond the sphericity assumption in dynamical HI models
Pieter Buyle, Herwig Dejonghe, Gianfranco Gentile
It is generally agreed that the rotational velocities of spiral galaxies indicate that a lot of matter is unseen. Hitherto, the majority of these mass models are all based on spher…
astro-ph2002
Unveiling Dark Matter with HI and Halpha Data - Observational Problems
G. Gentile, D. Vergani, P. Salucci +2
We present combined Halpha+HI rotation curves for a sample of spiral galaxies. Most of the velocity profiles (spectra at single points) in these galaxies are asymmetric, preventing…
astro-ph2002
Warps and Rotation Curves in Edge-On Galaxies
D. Vergani, G. Gentile, R. -J. Dettmar +2
We present our investigation on the effect of warps on the extraction of rotation curves in edge-on galaxies. The method to derive the rotation curve from the position-velocity dia…