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Published June 2015 | Published + Submitted
Journal Article Open

Characterizing the Cool KOIs. VIII. Parameters of the Planets Orbiting Kepler's Coolest Dwarfs


The coolest dwarf stars targeted by the Kepler Mission constitute a relatively small but scientifically valuable subset of the Kepler target stars, and provide a high-fidelity, nearby sample of transiting planetary systems. Using archival Kepler data spanning the entire primary mission, we perform a uniform analysis to extract, confirm, and characterize the transit signals discovered by the Kepler pipeline toward M-type dwarf stars. We recover all but two of the signals reported in a recent listing from the Exoplanet Archive resulting in 163 planet candidates associated with a sample of 104 low-mass stars. We fitted the observed light curves to transit models using a Markov Chain Monte Carlo method and we have made the posterior samples publicly available to facilitate further studies. We fitted empirical transit times to individual transit signals with significantly non-linear ephemerides for accurate recovery of transit parameters and precise measuring of transit timing variations. We also provide the physical parameters for the stellar sample, including new measurements of stellar rotation, allowing the conversion of transit parameters into planet radii and orbital parameters.

Additional Information

© 2015 The American Astronomical Society. Received 2014 December 26; accepted 2015 February 26; published 2015 June 22. J.J.S. would like to thank Jason Eastman, David Kipping, Ellen Price, and Natalie Batalha for their helpful input regarding various aspects of this work. All of the data presented in this paper were obtained from the MAST. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-Hubble Space Telescope data is provided by the NASA Office of Space Science via grant NNX13AC07G and by other grants and contracts. This paper includes data collected by the Kepler mission. Funding for the Kepler mission is provided by the NASA Science Mission directorate. A.V. and B.T.M. are supported by the National Science Foundation Graduate Research Fellowship, grant No. DGE 1144152 and DGE 1144469, respectively.

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Published - 0067-0049_218_2_26.pdf

Submitted - 1503.01115v1.pdf


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August 20, 2023
August 20, 2023