MOND--theoretical aspects

Details MOND--theoretical aspects MOND--theoretical aspects

2002-07-11

arxiv.org/abs/astro-ph/0207231v2

New Astron.Rev. 46 (2002) 741-753

Astronomy and Astrophysics

Astrophysics

22 pages, New Astr. Review. in press. Based on a talk presented at the MOND workshop, Paris, October 2001

Scientific paper

10.1016/S1387-6473(02)00243-9

I discuss open theoretical questions pertaining to the modified dynamics (MOND)--a proposed alternative to dark matter, which posits a breakdown of Newtonian dynamics in the limit of small accelerations. In particular, I point the reasons for thinking that MOND is an effective theory--perhaps, despite appearance, not even in conflict with GR. I then contrast the two interpretations of MOND as modified gravity and as modified inertia. I describe two mechanical models that are described by potential theories similar to (non-relativistic) MOND: a potential-flow model, and a membrane model. These might shed some light on a possible origin of MOND. The possible involvement of vacuum effects is also speculated on.

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