Comment on ``General Relativity Resolves Galactic Rotation Without Exotic Dark Matter'' by F.I. Cooperstock & S. Tieu

Abstract

The general relativistic model of Cooperstock & Tieu, which attempts to fit rotation curves of spiral galaxies without invoking dark matter, is tested empirically using observations of the Milky Way. In particular, predictions for the mass density in the solar neighbourhood and the vertical density distribution at the position of the Sun are compared with observations. It is shown that the model of Cooperstock & Tieu, which was so constructed that it gives an excellent fit of the observed rotation curve, singularly fails to reproduce the observed local mass density and the vertical density profile of the Milky Way.

4 pages, 1 figure, accepted by New Astronomy

References in corpus (3)

• The local density of matter mapped by Hipparcos
• M Dwarfs from Hubble Space Telescope Star Counts. IV
• Galactic structure from the Calar Alto Deep Imaging Survey (CADIS)

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• A method for evaluating models that use galaxy rotation curves to derive the density profiles
• The Bosma effect revisited - I. HI and stellar disc scaling models
• General Relativistic Thick Disks in the Accelerating Expanding Universe Dominated By Dark Energy
• Does Smoothing Matter?