The six-planet resonant chain of HD 110067

Abstract

HD 110067 is the brightest star known to have six transiting planets. Each adjacent pair of planets has a period ratio that is nearly equal to a ratio of small integers, suggesting the planets are in a chain of mean-motion resonances, but the limited time span of the available data has prevented firm conclusions. Here, we show that the requirement of long-term dynamical stability implies that all six planets are very likely to form a resonant chain. Dynamical simulations of nonresonant systems with initial conditions compatible with the available data almost always suffer an instability within $25$ Myr ($\sim 0.3\%$ of the system's age). Assuming the system is in resonance, we place upper limits on the planets' eccentricities and lower limits on the masses of the planets that have not yet been measured. We also predict the characteristics of transit timing variations and the values of the three-body libration centers.

8 pages, 5 figures, 2 tables. Accepted for publication in ApJL

References in corpus (16)

• Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
• DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
• Migration and the formation of systems of hot super-Earths and Neptunes
• A resonant chain of four transiting, sub-Neptune planets
• Six transiting planets and a chain of Laplace resonances in TOI-178
• A Dynamical Analysis of the Kepler-80 System of Five Transiting Planets
• On the evolution of mean motion resonances through stochastic forcing: Fast and slow libration modes and the origin of HD128311
• Chaotic Disintegration of the Inner Solar System
• TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain
• The path to instability in compact multi-planetary systems
• A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067
• The onset of instability in resonant chains
• A Criterion for the Stability of Planets in Chains of Resonances
• Resonant Chains of Exoplanets: Libration Centers for Three-body Angles
• Confirming the 3:2 Resonance Chain of K2-138
• Confirming Resonance in Three Transiting Systems

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