Statistics – Computation
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320..871n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 15, 1987, p. 871-874.
Statistics
Computation
51
Angular Momentum, Axes Of Rotation, Newton Second Law, Planetary Gravitation, Solar Gravitation, Solar System, Computational Astrophysics, Lorentz Transformations, Relativity, Spin Dynamics
Scientific paper
The close alignment of the Sun's spin axis with the solar system's planetary angular-momentum vector after 5 billion yr implies that the post-Newtonian gravitational interaction is Lorentz invariant to high precision. A metric gravity first post-Newtonian order (PPN) coefficient α2 is constrained to be of order 10-7 or less, and second post-Newtonian order (1/c4) aspects of the gravitational interaction are modestly constrained by the present-day solar system configuration. Observations related to possible precession of the spin axes of fast pulsars also are relevant to this precision test of the Lorentz invariance of gravity.
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