Aligned Major Axes in a Planetary System without Tidal Evolution: The 61 Virginis example

Details Aligned Major Axes in a Planetary System without Tidal Evolution: The 61 Virginis example Aligned Major Axes in a Planetary System without Tidal Evolution: The 61 Virginis example

2011-08-26

arxiv.org/abs/1108.5369v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

Accepted for publication in the Monthly Notices of the RAS. 21 pages, 2 figures

Scientific paper

Tidal damping of one of the orbits in a planetary system can lead to aligned major-axes (the so-called "fixed-point" condition), but currently aligned major axes do not necessarily imply such a history. An example is the nominal orbital solution for the 61 Virginis system where two orbits librate about alignment, but evaluation of the eigenmodes of the secular theory shows it could not be the result of tidal damping but rather of initial conditions. Nevertheless, the amplitudes of the eigenmodes suggest that this system may have undergone some degree of tidal damping.

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