Abstract
view Abstract Citations (88) References (6) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Probing Gravity to the Second Post-Newtonian Order and to One Part in 10 7 Using the Spin Axis of the Sun Nordtvedt, Ken Abstract 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. Publication: The Astrophysical Journal Pub Date: September 1987 DOI: 10.1086/165603 Bibcode: 1987ApJ...320..871N Keywords: Angular Momentum; Axes Of Rotation; Newton Second Law; Planetary Gravitation; Solar Gravitation; Solar System; Computational Astrophysics; Lorentz Transformations; Relativity; Spin Dynamics; Astrophysics; GRAVITATION; RELATIVITY; SUN: ROTATION full text sources ADS |
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