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Terrestrial Planet Occurrence Rates for the Kepler GK Dwarf Sample

Burke, Christopher J. and Christiansen, Jessie L. and Mullally, F. and Seader, Shawn and Huber, Daniel and Rowe, Jason F. and Coughlin, Jeffrey L. and Thompson, Susan E. and Catanzarite, Joseph and Clarke, Bruce D. and Morton, Timothy D. and Caldwell, Douglas A. and Bryson, Stephen T. and Haas, Michael R. and Batalha, Natalie M. and Jenkins, Jon M. and Tenenbaum, Peter and Twicken, Joseph D. and Li, Jie and Quintana, Elisa and Barclay, Thomas and Henze, Christopher E. and Borucki, William J. and Howell, Steve B. and Still, Martin (2015) Terrestrial Planet Occurrence Rates for the Kepler GK Dwarf Sample. Astrophysical Journal, 809 (1). Art. No. 8. ISSN 0004-637X.

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We measure planet occurrence rates using the planet candidates discovered by the Q1-Q16 Kepler pipeline search. This study examines planet occurrence rates for the Kepler GK dwarf target sample for planet radii, 0.75 ⩽ R_p ⩽ 2.5 R⊕, and orbital periods, 50 ⩽ P_(orb) ⩽ 300 days, with an emphasis on a thorough exploration and identification of the most important sources of systematic uncertainties. Integrating over this parameter space, we measure an occurrence rate of F_0 = 0.77 planets per star, with an allowed range of 0.3 ⩽ F_0 ⩽ 1.9. The allowed range takes into account both statistical and systematic uncertainties, and values of F_0 beyond the allowed range are significantly in disagreement with our analysis. We generally find higher planet occurrence rates and a steeper increase in planet occurrence rates toward small planets than previous studies of the Kepler GK dwarf sample. Through extrapolation, we find that the one year orbital period terrestrial planet occurrence rate ζ_(1.0)= 0.1, with an allowed range of 0.01 ⩽ ζ_(1.0) ⩽ 2, where ζ_(1.0) is defined as the number of planets per star within 20% of the R_p and P_(orb) of Earth. For G dwarf hosts, the ζ_(1.0) parameter space is a subset of the larger η⊕ parameter space, thus ζ_(1.0) places a lower limit on η⊕ for G dwarf hosts. From our analysis, we identify the leading sources of systematics impacting Kepler occurrence rate determinations as reliability of the planet candidate sample, planet radii, pipeline completeness, and stellar parameters.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle Paper
Christiansen, Jessie L.0000-0002-8035-4778
Huber, Daniel0000-0001-8832-4488
Rowe, Jason F.0000-0002-5904-1865
Coughlin, Jeffrey L.0000-0003-1634-9672
Thompson, Susan E.0000-0001-7106-4683
Morton, Timothy D.0000-0002-8537-5711
Caldwell, Douglas A.0000-0003-1963-9616
Jenkins, Jon M.0000-0002-4715-9460
Li, Jie0000-0002-3733-4587
Barclay, Thomas0000-0001-7139-2724
Howell, Steve B.0000-0002-2532-2853
Additional Information:© 2015 The American Astronomical Society. Received 2015 April 23; accepted 2015 June 16; published 2015 August 4. We thank the referee for insightful suggestions which improved the manuscript. Funding for this Discovery mission is provided by NASA’s Science Mission Directorate. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. D.H. acknowledges support by the Australian Research Council’s Discovery Projects funding scheme (project number DE140101364) and support by the National Aeronautics and Space Administration under grant NNX14AB92G issued through the Kepler Participating Scientist Program.
Funding AgencyGrant Number
Australian Research CouncilDE140101364
Subject Keywords:catalogs – eclipses – methods: statistical – planetary systems – space vehicles – surveys
Issue or Number:1
Record Number:CaltechAUTHORS:20151019-100300994
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61250
Deposited By: Tony Diaz
Deposited On:19 Oct 2015 17:47
Last Modified:09 Mar 2020 13:19

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