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Title:
Aligned major axes in a planetary system without tidal evolution: the 61 Virginis example
Authors:
Greenberg, Richard; van Laerhoven, Christa
Affiliation:
AA(Lunar and Planetary Laboratory, University of Arizona, 1629 East University Boulevard, Tucson, AZ 85721-0092, USA), AB(Lunar and Planetary Laboratory, University of Arizona, 1629 East University Boulevard, Tucson, AZ 85721-0092, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 419, Issue 1, pp. 429-435. (MNRAS Homepage)
Publication Date:
01/2012
Origin:
WILEY
Astronomy Keywords:
celestial mechanics, planets and satellites: dynamical evolution and stability
Abstract Copyright:
© 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS
DOI:
10.1111/j.1365-2966.2011.19707.x
Bibliographic Code:
2012MNRAS.419..429G

Abstract

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. The amplitudes of the eigenmodes suggest that, at most, this system may have undergone some modest degree of tidal damping.
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