Kepler-108: A Mutually Inclined Giant Planet System
Abstract
The vast majority of well studied giant-planet systems, including the Solar System, are nearly coplanar which implies dissipation within a primordial gas disk. however, intrinsic instability may lead to planet-planet scattering, which often produces non-coplanar, eccentric orbits. Planet scattering theories have been developed to explain observed high eccentricity systems and also hot Jupiters; thus far their predictions for mutual inclination (I) have barely been tested. Here we characterize a highly mutually-inclined (I ~ 15-60 degrees), moderately eccentric (e >~ 0.1) giant planet system: Kepler-108. This system consists of two approximately Saturn-mass planets with periods of ~49 and ~190 days around a star with a wide (~300AU) binary companion in an orbital configuration inconsistent with a purely disk migration origin.
Cite
@article{arxiv.1606.04485,
title = {Kepler-108: A Mutually Inclined Giant Planet System},
author = {Sean M. Mills and Daniel C. Fabrycky},
journal= {arXiv preprint arXiv:1606.04485},
year = {2017}
}
Comments
Draft version submitted to Astrophysical Journal. Comments welcome