A Caltech Library Service

Long-period Giant Companions to Three Compact, Multiplanet Systems

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.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Accepted Version
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Mills, Sean M.0000-0002-4535-6241
Howard, Andrew W.0000-0001-8638-0320
Weiss, Lauren M.0000-0002-3725-3058
Isaacson, Howard0000-0002-0531-1073
Fulton, Benjamin J.0000-0003-3504-5316
Petigura, Erik A.0000-0003-0967-2893
Kosiarek, Molly R.0000-0002-6115-4359
Hirsch, Lea A.0000-0001-8058-7443
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 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
Funding AgencyGrant Number
NSF Graduate Research FellowshipDGE-1339067
Beatrice Watson Parrent FellowshipUNSPECIFIED
Trottier Family FoundationUNSPECIFIED
Levy Family FoundationUNSPECIFIED
Subject Keywords:planetary systems
Issue or Number:4
Record Number:CaltechAUTHORS:20190318-092843332
Persistent URL:
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
Deposited By: Tony Diaz
Deposited On:18 Mar 2019 17:52
Last Modified:16 Nov 2021 17:01

Repository Staff Only: item control page