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Galaxy rotation curves: the effect of the Ampere force

By David Tsiklauri

Abstract

Using an example of the galaxy, an attempt is made to explain the flat rotational curves of gas and plasma in galaxies by means of the Ampere force. Using acceptable models for the galactic magnetic field and plausible physical parameters, we find that the flat rotational curves for gas and plasma can be obtained based purely on the observed baryonic (visible) matter distribution and the ampere force term in the static MHD equation of motion. We also study effects of strength of the magnetic field, its pitch angle and length scale on the rotational curves. Subject headings: Galaxy: kinematics and dynamics – Galaxy: fundamental parameters – galaxies: magnetic fields – (cosmology:) dark matter

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