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Title: Constraints on the architecture of the HD 95086 planetary system with the Gemini Planet Imager

Journal Article · · The Astrophysical Journal. Letters (Online)
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  1. Univ. de Montreal, Montreal, QC (Canada)
  2. SETI Institute, Mountain View, CA (United States); Stanford Univ., Stanford, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. SETI Institute, Mountain View, CA (United States); Brown Univ., Providence, RI (United States)
  5. Arizona State Univ., Tempe, AZ (United States)
  6. Stanford Univ., Stanford, CA (United States)
  7. SETI Institute, Mountain View, CA (United States)
  8. Univ. of Toronto, Toronto, ON (Canada)
  9. Univ. of California, Berkeley, CA (United States); Univ. Grenoble Alpes/CNRS, Grenoble (France)
  10. Univ. of California, Los Angeles, CA (United States)
  11. Univ. of Victoria, Victoria, BC (Canada); National Research Council of Canada Herzberg, Victoria, BC (Canada)
  12. The Univ. of Western Ontario, London, ON (Canada); Stony Brook Univ., Stony Brook, NY (United States)
  13. Space Telescope Science Institute, Baltimore, MD (United States)
  14. Cornell Univ., Ithaca, NY (United States)
  15. Space Telescope Science Institute, Baltimore, MD (United States); Johns Hopkins Univ., Baltimore, MD (United States)
  16. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  17. European Southern Observatory, Santiago (Chile)
  18. Large Synoptic Survey Telescope, Tucson, AZ (United States)
  19. SETI Institute, Mountain View, CA (United States); Univ. of California, Berkeley, CA (United States)
  20. Univ. of Arizona, Tucson, AZ (United States)
  21. Gemini Observatory, La Serena (Chile)
+ Show Author Affiliations

Here, we present astrometric monitoring of the young exoplanet HD 95086 b obtained with the Gemini Planet Imager between 2013 and 2016. A small but significant position angle change is detected at constant separation; the orbital motion is confirmed with literature measurements. Efficient Monte Carlo techniques place preliminary constraints on the orbital parameters of HD 95086 b. With 68% confidence, a semimajor axis of $${61.7}_{-8.4}^{+20.7}$$ au and an inclination of $$153° {0}_{-13.5}^{+9.7}$$ are favored, with eccentricity less than 0.21. Under the assumption of a coplanar planet–disk system, the periastron of HD 95086 b is beyond 51 au with 68% confidence. Therefore, HD 95086 b cannot carve the entire gap inferred from the measured infrared excess in the SED of HD 95086. We use our sensitivity to additional planets to discuss specific scenarios presented in the literature to explain the geometry of the debris belts. We suggest that either two planets on moderately eccentric orbits or three to four planets with inhomogeneous masses and orbital properties are possible. As a result, the sensitivity to additional planetary companions within the observations presented in this study can be used to help further constrain future dynamical simulations of the planet–disk system.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)
Grant/Contract Number:
AC52-07NA27344; AST-1518332; AST-1411868; AST-141378; NNX15AD95G/NEXSS; NNX15AC89G; NNX14AJ80G
OSTI ID:
1352122
Report Number(s):
LLNL-JRNL-717744
Journal Information:
The Astrophysical Journal. Letters (Online), Vol. 822, Issue 2; ISSN 2041-8213
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (23)

The GJ 504 system revisited: Combining interferometric, radial velocity, and high contrast imaging data journal October 2018
Origin of the asymmetry of the wind driven halo observed in high-contrast images journal December 2018
Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 yr of VLT/SPHERE monitoring journal April 2019
Imaging Extrasolar Giant Planets journal August 2016
A gap in HD 92945’s broad planetesimal disc revealed by ALMA journal January 2019
THE ORBIT AND TRANSIT PROSPECTS FOR β PICTORIS b CONSTRAINED WITH ONE MILLIARCSECOND ASTROMETRY journal October 2016
Orbits for the Impatient: A Bayesian Rejection-sampling Method for Quickly Fitting the Orbits of Long-period Exoplanets journal April 2017
ALMA 1.3 mm Map of the HD 95086 System journal November 2017
Dynamical Constraints on the HR 8799 Planets with GPI journal October 2018
Three Direct Imaging Epochs Could Constrain the Orbit of Earth 2.0 inside the Habitable Zone journal April 2019
The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au journal June 2019
Improving Orbit Estimates for Incomplete Orbits with a New Approach to Priors: with Applications from Black Holes to Planets journal June 2019
Radial Velocity Discovery of an Eccentric Jovian World Orbiting at 18 au journal October 2019
Population-level Eccentricity Distributions of Imaged Exoplanets and Brown Dwarf Companions: Dynamical Evidence for Distinct Formation Channels journal January 2020
A gap in HD 92945’s broad planetesimal disc revealed by ALMA text January 2019
The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au text January 2019
The exoplanet handbook: Book Review journal March 2012
Imaging Extrasolar Giant Planets text January 2016
Orbits for the Impatient: A Bayesian Rejection Sampling Method for Quickly Fitting the Orbits of Long-Period Exoplanets text January 2017
A gap in HD 92945's broad planetesimal disc revealed by ALMA text January 2019
Three direct imaging epochs could constrain the orbit of Earth 2.0 inside the habitable zone text January 2019
Population-Level Eccentricity Distributions of Imaged Exoplanets and Brown Dwarf Companions: Dynamical Evidence for Distinct Formation Channels text January 2019
The GJ 504 system revisited: Combining interferometric, radial velocity, and high contrast imaging data text January 2018

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
astrometry
planet
disk interactions
planetary systems
stars: individual (HD 95086)