On the role of magnetic fields in H I rotation curves

Details On the role of magnetic fields in H I rotation curves On the role of magnetic fields in H I rotation curves

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.289..863s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 289, Issue 4, pp. 863-868.

Astronomy and Astrophysics

Astronomy

2

Galaxies: Haloes, Galaxies: Individual: Ngc 1560, Galaxies: Kinematics And Dynamics, Galaxies: Magnetic Fields, Galaxies: Spiral, Dark Matter

Scientific paper

The importance of large-scale magnetic fields in H I rotation curves of spiral galaxies is investigated. In contrast to other papers that try to render dark matter unnecessary, we assume that galaxies are embedded within a modified isothermal dark halo. The NGC 1560 magnetic field is derived from a simple prescription suggested recently by Sanchez-Salcedo for large luminous spirals. The detailed shape of the observed rotation curve fits reasonably well with a magnetic field strength ~1muG. This magnetic fit is as good as that for modified Newtonian dynamics (MOND). We conclude that prominent structure in the rotation curves of dwarf galaxies is compatible with dominant dark haloes.

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