On the influence of galaxy magnetic fields on the rotation curves in the outer discs of galaxies

Details On the influence of galaxy magnetic fields on the rotation curves in the outer discs of galaxies On the influence of galaxy magnetic fields on the rotation curves in the outer discs of galaxies

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..115n&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, July 1, 1988, p. 115-121.

Statistics

Computation

22

Angular Velocity, Dynamic Models, Galactic Rotation, Interstellar Magnetic Fields, Magnetic Effects, Computational Astrophysics, Gas Flow, Gravitational Effects, Magnetohydrodynamic Waves, Radial Velocity, Three Dimensional Models, Universe

Scientific paper

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.

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