New Class of Orbital Preferred Frame Effects

Details New Class of Orbital Preferred Frame Effects New Class of Orbital Preferred Frame Effects

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..may..e907k&link_type=abstract

American Physical Society, APS/AAPT Joint Meeting, May 2-5, 1996, abstract #E9.07

Physics

Scientific paper

We use an extension of the PPN formalism that accounts for the presence of strong gravitational fields in compact stars to complete the analysis of binary orbits perturbed by a binary's motion relative to a preferred frame singled out by the mean distribution of matter throughout the Universe. Previous work focussed on essentially circular orbits and found perturbations reflecting interplay between the spatial direction singled out by a binary's velocity relative to the preferred frame, w, and the binary's internal anisotropy as represented by its angular momentum vector. We treat eccentric orbits and find a new class of perturbations reflecting the interplay between w and a binary's Runge-Lenz vector. The novel character of these perturbations would help distinguish their effects in binary pulsar timing data, however, their small amplitude forces us to conclude that searching for their effects is unlikely to yield constraints on preferred frame parameters that are sharper than existing ones.

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