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K. Moody, S. Sigurdsson (Pennsylvania State University)
We use octupole level three-body secular perturbation equations to examine the evolution of the eccentricity of the orbit of the low mass white dwarf around the pulsar in the PSR 1620-26 system by varying several parameters around suspected values. Taking into account GR precession, we find that for highly inclined retrograde orbits (98>i>90 degrees) and masses of the outer body more than 2 mJ, the eccentricity of the inner orbit can be made as high as the observed value (e1=0.025). This result can limit possible formation scenarios for this system. Jovian mass planets having highly eccentric orbits, such as 70 Vir b, may have had their orbits perturbed into that state by a captured body in an inclined wide orbit.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.