HD 83443c: A highly eccentric giant planet on a 22-year orbit
arXiv:2204.05711 · doi:10.3847/1538-3881/ac6589
Abstract
We report the discovery of a highly eccentric long-period Jovian planet orbiting the hot-Jupiter host HD\,83443. By combining radial velocity data from four instruments (AAT/UCLES, Keck/HIRES, HARPS, Minerva-Australis) spanning more than two decades, we find evidence for a planet with m~sin~\,\mj, moving on an orbit with 0.8\,au and eccentricity 0.05. We combine our radial velocity analysis with \textit{Gaia} eDR3 /\textit{Hipparcos} proper motion anomalies and derive a dynamical mass of . We perform a detailed dynamical simulation that reveals locations of stability within the system that may harbor additional planets, including stable regions within the habitable zone of the host star. HD\,83443 is a rare example of a system hosting a hot Jupiter and an exterior planetary companion. The high eccentricity of HD\,83443c suggests that a scattering event may have sent the hot Jupiter to its close orbit while leaving the outer planet on a wide and eccentric path.
References in corpus (34)
- Dynamical Outcomes of Planet-Planet Scattering
- Habitable Zones Around Main-Sequence Stars: Dependence on Planetary Mass
- Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
- Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
- Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
- Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
- The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition
- Detection Limits from the McDonald Observatory Planet Search Program
- Properties of planets in binary systems. The role of binary separation
- Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity
- Six transiting planets and a chain of Laplace resonances in TOI-178
- Population-Level Eccentricity Distributions of Imaged Exoplanets and Brown Dwarf Companions: Dynamical Evidence for Distinct Formation Channels
- A Catalog of Kepler Habitable Zone Exoplanet Candidates
- Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars
- Cool Jupiters greatly outnumber their toasty siblings: Occurrence rates from the Anglo-Australian Planet Search
- Abundance to age ratios in the HARPS-GTO sample with Gaia DR2: Chemical clocks for a range of [Fe/H]
- Effective field theory calculation of second post-Newtonian binary dynamics
- A Search for Multi-Planet Systems Using the Hobby-Eberly Telescope
- Long-Period Objects in the Extrasolar Planetary Systems 47 UMa and 14 Her
- The consequences of planetary migration on the minor bodies of the early Solar System
- Visible-light Phase Curves from the Second Year of the TESS Primary Mission
- Solar System Physics for Exoplanet Research
- The First Dynamical Mass Measurement in the HR 8799 System
- Investigating the Planet-Metallicity Correlation for Hot Jupiters
- 2001 QR322: a dynamically unstable Neptune Trojan?
- Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems
- The Pan-Pacific Planet Search VI: Giant planets orbiting HD 86950 and HD 222076
- Highly inclined and eccentric massive planets. II. Planet-planet interactions during the disc phase
- Co-orbital exoplanets from close period candidates: The TOI-178 case
- The Anglo-Australian Planet Search XXV: A Candidate Massive Saturn Analog Orbiting HD 30177
- The Mt John University Observatory Search For Earth-mass Planets In The Habitable Zone Of Alpha Centauri
- In the Presence of a Wrecking Ball: Orbital Stability in the HR 5183 System
- Quantifying the Influence of Jupiter on the Earth's Orbital Cycles
- Astrocladistics of the Jovian Trojan Swarms