On the influence of galaxy magnetic fields on the rotation curves in the outer discs of galaxies
Open Access
- 1 July 1988
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 233 (1) , 115-121
- https://doi.org/10.1093/mnras/233.1.115
Abstract
The dynamical effect of magnetic stress on the tenuous outer gaseous discs of galaxies is discussed using a simplified cylindrical model. It is shown that the effects can be very significant, yielding rotation velocities well above the gravitational orbital velocity based on the visible matter. If this conclusion persists in fully three-dimensional galaxy models then the interpretation of flat rotation curves in the outer discs as being due to hidden matter may be erroneous.Keywords
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