1995/11/05 by Norbert Wex, Wex, Norbert · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research #astro-ph #gr-qc
paper · pdf · doi:10.48550/arxiv.gr-qc/9511017
6 pages, PostScript, 2 figures included. Submitted to Astronomy & Astrophysics. replaced by accepted version (minor corrections)
openalex publication_date 1995/11/05 · arxiv created 1996/06/29 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Strong Equivalence Principle (SEP) demands, besides the validity of the Einstein Equivalence Principle, that all self-gravitating bodies feel the same acceleration in an external gravitational field. It has been found that metric theories of gravity other that than general relativity typically predict a violation of the SEP. In case of the Earth-Moon system (weak field system) this violation is called the Nordtvedt effect. It has been shown by Damour and Schäfer, that small-eccentricity long-orbital-period binary pulsars with a white dwarf companion provide excellent conditions to test the SEP in strong field regimes. Based on newly discovered binary pulsars this paper investigates a possible violation of the SEP in strong field regimes. New limits with an improved confidence level are presented. The results of this paper lead to constrains on the combination ε/2-ζ of the only two (post)2-Newtonian parameters ε and ζ that arise from the (post)2-Newtonian approximation of the tensor-multi-scalar theory of Damour and Esposito-Farèse.