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On the relationship between MOND and DM
Numerous astrophysical observations have shown that classical Newtonian
dynamics fails on galactic scales and beyond, if only visible matter is taken
into account. The two most popular theoretical concepts dealing with this
problem are Dark Matter (DM) and Modified Newtonian Dynamics (MOND). In the
first part of this paper it is demonstrated that a generalized MOND equation
can be derived in the framework of Newtonian Dark Matter theory. For systems
satisfying a fixed relationship between the gravitational fields caused by DM
and visible matter, this generalized MOND equation reduces to the traditional
MOND law, first postulated by Milgrom. Therefore, we come to the conclusion
that traditional MOND can also be interpreted as special limit case of DM
theory. In the second part, a formal derivation of the Tully-Fisher relation is
discussed.Comment: 5 pages, accepted for publication in Astrophys. J. Letter