The Orbit and Mass of the Third Planet in the Kepler-56 System
Otor, Oderah Justin
Montet, Benjamin T.
Howard, Andrew W.
Watson, ChrisNote: Order does not necessarily reflect citation order of authors.
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CitationOtor, Oderah Justin, Benjamin T. Montet, John Asher Johnson, David Charbonneau, Andrew Collier-Cameron, Andrew W. Howard, Howard Isaacson, et al. 2016. The Orbit and Mass of the Third Planet in the Kepler-56 System. The Astronomical Journal 152, no. 6: 165. doi:10.3847/0004-6256/152/6/165.
AbstractWhile the vast majority of multiple-planet systems have orbital angular momentum axes that align with the spin axis of their host star, Kepler-56 is an exception: its two transiting planets are coplanar yet misaligned by at least 40 degrees with respect to the rotation axis of their host star. Additional follow-up observations of Kepler-56 suggest the presence of a massive, non-transiting companion that may help explain this misalignment. We model the transit data along with Keck/HIRES and HARPSN radial velocity data to update the masses of the two transiting planets and infer the physical properties of the third, non-transiting planet. We employ a Markov Chain Monte Carlo sampler to calculate the best-fitting orbital parameters and their uncertainties for each planet. We find the outer planet has a period of 1002 ± 5 days and minimum mass of 5.61 ± 0.38 MJup. We also place a 95% upper limit of 0.80 m s−1 yr−1 on long-term trends caused by additional, more distant companions.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:30410816
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