TRANSITS AND OCCULTATIONS OF AN EARTH-SIZED PLANET IN AN 8.5 hr ORBIT
Author(s)Kotson, Michael C.; Latham, David W.; Buchhave, Lars A.; Sanchis Ojeda, Roberto; Winn, Joshua Nathan; Rappaport, Saul A; Levine, Alan M; ... Show more Show less
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We report the discovery of an Earth-sized planet (1.16 ± 0.19 R [subscript ⊕]) in an 8.5 hr orbit around a late G-type star (KIC 8435766, Kepler-xx). The object was identified in a search for short-period planets in the Kepler database and confirmed to be a transiting planet (as opposed to an eclipsing stellar system) through the absence of ellipsoidal light variations or substantial radial-velocity variations. The unusually short orbital period and the relative brightness of the host star (m [subscript Kep] = 11.5) enable robust detections of the changing illumination of the visible hemisphere of the planet, as well as the occultations of the planet by the star. We interpret these signals as representing a combination of reflected and reprocessed light, with the highest planet dayside temperature in the range of 2300 K-3100 K. Follow-up spectroscopy combined with finer sampling photometric observations will further pin down the system parameters and may even yield the mass of the planet.
DepartmentMassachusetts Institute of Technology. Department of Physics; MIT Kavli Institute for Astrophysics and Space Research
The Astrophysical Journal
Sanchis-Ojeda, Roberto, Saul Rappaport, Joshua N. Winn, Alan Levine, Michael C. Kotson, David W. Latham, and Lars A. Buchhave. “TRANSITS AND OCCULTATIONS OF AN EARTH-SIZED PLANET IN AN 8.5 Hr ORBIT.” The Astrophysical Journal 774, no. 1 (August 16, 2013): 54.
Author's final manuscript