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The Evil-Mc Model For Ellipsoidal Variations Of Planet-Hosting Stars And Applications To The Hat-P-7 System, Brian K. Jackson, Nikole K. Lewis, Jason W. Barnes, L. Drake Deming, Adam P. Showman, Jonathan J. Fortney
The Evil-Mc Model For Ellipsoidal Variations Of Planet-Hosting Stars And Applications To The Hat-P-7 System, Brian K. Jackson, Nikole K. Lewis, Jason W. Barnes, L. Drake Deming, Adam P. Showman, Jonathan J. Fortney
Brian Jackson
We present a new model for Ellipsoidal Variations Induced by a Low-Mass Companion, the EVIL-MC model. We employ several approximations appropriate for planetary systems to substantially increase the computational efficiency of our model relative to more general ellipsoidal variation models and improve upon the accuracy of simpler models. This new approach gives us a unique ability to rapidly and accurately determine planetary system parameters. We use the EVIL-MC model to analyze Kepler Quarter 0-2 (Q0-2) observations of the HAT-P-7 system, an F-type star orbited by a ~ Jupiter-mass companion. Our analysis corroborates previous estimates of the planet-star mass ratio q …