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Cited by 28Stellar, planetary, and galactic studiesAstronomy and Astrophysical ResearchAstro and Planetary Science

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No Difference in Orbital Parameters of RV-detected Giant Planets between 0.1 and 5 au in Single versus Multi-stellar Systems

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Ngo, Henry, Knutson, Heather A., Bryan, Marta L., Blunt, Sarah, Nielsen, Eric L., Batygin, Konstantin, Bowler, Brendan P., Crepp, Justin R., Hinkley, Sasha, Howard, Andrew W., Mawet, Dimitri·2017·The Astronomical Journal
DOI 10.3847/1538-3881/aa6cac
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Abstract

Our Keck/NIRC2 imaging survey searches for stellar companions around 144 systems with radial velocity (RV) detected giant planets to determine whether stellar binaries influence the planets’ orbital parameters. This survey, the largest of its kind to date, finds eight confirmed binary systems and three confirmed triple systems. These include three new multi-stellar systems (HD 30856, HD 86081, and HD 207832) and three multi-stellar systems with newly confirmed common proper motion (HD 43691, HD 116029, and HD 164509). We combine these systems with seven RV planet-hosting multi-stellar systems from the literature in order to test for differences in the properties of planets with semimajor axes ranging between 0.1 and 5 au in single versus multi-stellar systems. We find no evidence that the presence or absence of stellar companions alters the distribution of planet properties in these systems. Although the observed stellar companions might influence the orbits of more distant planetary companions in these systems, our RV observations currently provide only weak constraints on the masses and orbital properties of planets beyond 5 au. In order to aid future efforts to characterize long-period RV companions in these systems, we publish our contrast curves for all 144 targets. Using four years of astrometry for six hierarchical triple star systems hosting giant planets, we fit the orbits of the stellar companions in order to characterize the orbital architecture in these systems. We find that the orbital plane of the secondary and tertiary companions are inconsistent with an edge-on orbit in four out of six cases.

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  • Ngo et al. (2017) found no significant differences in the mass, orbital eccentricity, and semi-major axis distribution of the innermost planet in multi-stellar systems vs. single-star systems.

    “Consistent with this mechanism not playing a major role in shaping the architectures of planetary systems, Ngo et al. (2017) found no significant differences in the mass, orbital eccentricity, and semi-major axis distribution of the innermost planet in the multi-stellar systems vs. single-star systems.”

    From Origins of Hot Jupiters (2018) · cites this paper as Ngo et al. 2017

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Metadata

Authors
Ngo, H., Knutson, H. A., Bryan, M. L., Blunt, S., Nielsen, E. L., Batygin, K., Bowler, B. P., Crepp, J. R., Hinkley, S., Howard, A. W., & Mawet, D.
Affiliations
  • California Institute of Technology (US)
  • Brown University (US)
  • Kavli Institute for Particle Astrophysics and Cosmology (US)
  • McDonald Observatory (US)
  • University of Notre Dame (US)
  • University of Exeter (GB)
Corresponding author
Ngo, Henry
ORCID
Venue
The Astronomical Journal
Publisher
American Astronomical Society
Published
2017-05-04
Volume
153
Issue
6
Pages
242
ISSN
  • 0004-6256 (ISSN-L)
  • 1538-3881
DOI
10.3847/1538-3881/aa6cac
OpenAlex
W2611730930
Cited by
28
References
1
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 4 · 2022: 2 · 2021: 3 · 2020: 5 · 2019: 2 · 2018: 6
FWCI
1.94
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astronomical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Aeronautics and Space Administration (NNX14AD24G, NNX15AR12H, NNX14AJ80G)
  • Alfred P. Sloan Foundation
  • California Institute of Technology
  • Natural Sciences and Engineering Research Council of Canada
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Instrumentation › Astronomy and Astrophysical Research
  • Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Astro and Planetary Science
Keywords
giant planets, stellar companions, binary stars, triple star systems, radial velocity planets, stellar multiplicity, hierarchical triple systems, orbital plane, common proper motion

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