期刊
NEW ASTRONOMY REVIEWS
卷 46, 期 12, 页码 741-753出版社
ELSEVIER SCI LTD
DOI: 10.1016/S1387-6473(02)00243-9
关键词
cosmology; the dark matter problem; galaxy dynamics
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. (C) 2002 Elsevier Science B.V. All rights reserved.
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