327.01 - A Search for Transiting Planets in NGC 6791

Date & Time

Jan 9th at 2:00 PM until 2:10 PM




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Author(s): B. Montet, University of Chicago, Chicago, Illinois, UNITED STATES|
Institution(s): 1. University of Chicago, Chicago, IL, United States.
Contributing team(s): (none)
Planets in clusters with known ages and metallicities provide essential information about how environment effects the formation and evolution of planetary systems. NGC 6791, an 8 billion year old cluster with iron abundance twice that of the Sun, is one such cluster; understanding differences in planet occurrence between this cluster and the field can inform us both about the role metallicity plays in planet formation and the long-term dynamical evolution of planetary systems. This cluster was in the Kepler field of view, but due to the relatively high stellar density and low resolution of Kepler, light curves were never produced for the vast majority of stars in NGC 6791. Rather than using a standard aperture photometry approach, here we employ a model of the Kepler pixel response function to recover the brightness of thousands of stars in NGC 6791 observed by Kepler throughout the mission, which we search for planets. We identify several planet candidates in this dataset as well as previously unknown eclipsing binaries in the cluster, including the highest eccentricity eclipsing binary ever discovered. We discuss the implications of these results in the context of the long-term evolution of planetary systems.