Dark companion of baryonic matter in spliral galaxies

Details Dark companion of baryonic matter in spliral galaxies Dark companion of baryonic matter in spliral galaxies

2008-12-22

arxiv.org/abs/0812.4127v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages

Scientific paper

Flat or almost flat rotation curves of spiral galaxies can be explained by logarithmic gravitational potentials. The field equations of GR admit of spacetime metrics with such behaviors. The scenario can be interpreted either as an alternative theory of gravitation or, equivalently, as a dark matter paradigm. In the latter interpretation, one is led to assign a dark companion to the baryonic matter who's size and distribution is determined by the mass of the baryons. The formalism also opens up a way to support Milgrom's idea that the acceleration of a test object in a gravitational field is not simply the newtonian gravitational force $g_N$, but rather an involved function of $(g_N/a_0)$, $a_0$ MOND's universal acceleration. Keywords: Dark matter; Alternative GR; Spiral galaxies, rotation curves of

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