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Post-Capture Evolution of Potentially Habitable Exomoons | | Simon B. Porter
; William M. Grundy
; | | Date: |
14 Jun 2011 | | Abstract: | The satellites of extrasolar planets (exomoons) have been recently proposed
as astrobiological targets. Since giant planets in the habitable zone are
thought to have migrated there, it is possible that they may have captured a
former terrestrial planet or planetesimal. We therefore attempt to model the
dynamical evolution of a terrestrial planet captured into orbit around a giant
planet in the habitable zone of a star. We find that approximately half of
loose elliptical orbits result in stable circular orbits over timescales of
less than a few million years. We also find that those orbits are mostly
low-inclination, but have no prograde/retrograde preference. In addition, we
calculate the transit timing and duration variations for the resulting systems,
and find that potentially habitable Earth-mass exomoons should be detectable. | | Source: | arXiv, 1106.2800 | | Services: | Forum | Review | PDF | Favorites | |
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