Open AccessSolar system constraints on multifield theories of modified dynamics
Author(s) -
Sanders R. H.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10583.x
Subject(s) - physics , phenomenology (philosophy) , classical mechanics , modified newtonian dynamics , solar system , general relativity , gravitation , scalar (mathematics) , inverse , theoretical physics , astrophysics , galaxy , geometry , philosophy , mathematics , epistemology , halo , galaxy rotation curve
Any viable theory of modified Newtonian dynamics (MOND) as modified gravity is likely to require fields in addition to the usual tensor field of General Relativity. For these theories, the MOND phenomenology emerges as an effective fifth force probably associated with a scalar field. Here, I consider the constraints imposed on such theories by Solar system phenomenology, primarily by the absence of significant deviations from inverse‐square attraction in the inner Solar system as well as detectable local preferred frame effects. The current examples of multifield theories can be constructed to satisfy these constraints and such theories lead inevitably to an anomalous non‐inverse‐square force in the outer Solar system.