Mills, Sean M. and Howard, Andrew W. and Weiss, Lauren M. and Steffen, Jason H. and Isaacson, Howard and Fulton, Benjamin J. and Petigura, Erik A. and Kosiarek, Molly R. and Hirsch, Lea A. and Boisvert, John H. (2019) Long-period Giant Companions to Three Compact, Multiplanet Systems. Astronomical Journal, 157 (4). Art. No. 145. ISSN 1538-3881. doi:10.3847/1538-3881/ab0899. https://resolver.caltech.edu/CaltechAUTHORS:20190318-092843332
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Abstract
Understanding the relationship between long-period giant planets and multiple smaller short-period planets is critical for formulating a complete picture of planet formation. This work characterizes three such systems. We present Kepler-65, a system with an eccentric (e = 0.28 ± 0.07) giant planet companion discovered via radial velocities (RVs) exterior to a compact, multiply transiting system of sub-Neptune planets. We also use precision RVs to improve mass and radius constraints on two other systems with similar architectures, Kepler-25 and Kepler-68. In Kepler-68 we propose a second exterior giant planet candidate. Finally, we consider the implications of these systems for planet formation models, particularly that the moderate eccentricity in Kepler-65's exterior giant planet did not disrupt its inner system.
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| Additional Information: | © 2019 The American Astronomical Society. Received 2018 December 14; revised 2019 February 6; accepted 2019 February 18; published 2019 March 18. We thank the Kepler and Gaia teams for years of work making these precious data sets possible. This research has made use of NASA's Astrophysics Data System, the Exoplanet Orbit Database, and the Exoplanet Data Explorer at http://exoplanets.org. M.R.K acknowledges support from the NSF Graduate Research Fellowship, grant No. DGE 1339067. L.M.W. acknowledges support from the Beatrice Watson Parrent Fellowship, the Trottier Family Foundation, and the Levy family. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has long had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Facilities: Keck (HIRES) - , Kepler - The Kepler Mission. Software: radvel (Fulton et al. 2018). | ||||||||||||||||||
| Group: | Infrared Processing and Analysis Center (IPAC), Astronomy Department | ||||||||||||||||||
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| Subject Keywords: | planetary systems | ||||||||||||||||||
| Issue or Number: | 4 | ||||||||||||||||||
| DOI: | 10.3847/1538-3881/ab0899 | ||||||||||||||||||
| Record Number: | CaltechAUTHORS:20190318-092843332 | ||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190318-092843332 | ||||||||||||||||||
| Official Citation: | Sean M. Mills et al 2019 AJ 157 145 | ||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||
| ID Code: | 93909 | ||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||||||
| Deposited On: | 18 Mar 2019 17:52 | ||||||||||||||||||
| Last Modified: | 16 Nov 2021 17:01 |
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