2004/04/14 by D. R. Lorimer, P. C. C. Freire, Lorimer, D. R. +1
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0404270
5 pages, onefigure, to appear in "Binary Pulsars" Eds. Rasio & Stairs
arxiv created 2004/04/14 · openalex publication_date 2004/04/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Following a brief review of the principles of the strong equivalence principle (SEP) and tests for its violation in the strong and weak gravitational field regimes, we present preliminary results of new tests using two long-period binary pulsars: J0407+1607 and J2016+1947. PSR J0407+1607 is in a 669-day orbit around a \gapp 0.2 M\odot companion, while J2016+1947 is in a 635-day orbit around a \gapp 0.3 M\odot companion. The small eccentricities of both orbits (e ∼ 10-3) mean that these systems reduce previous limits on SEP violation by more than a factor of 4.