In the Presence of a Wrecking Ball: Orbital Stability in the HR 5183 System

Abstract

Discoveries of exoplanets using the radial velocity method are progressively reaching out to increasingly longer orbital periods as the duration of surveys continues to climb. The improving sensitivity to potential Jupiter analogs is revealing a diversity of orbital architectures that are substantially different from that found in our solar system. An excellent example of this is the recent discovery of HR 5183b; a giant planet on a highly eccentric ($e=0.84$) $\sim$75~year orbit. The presence of such giant planet orbits are intrinsically interesting from the perspective of the dynamical history of planetary systems, and also for examining the implications of on-going dynamical stability and habitability of these systems. In this work, we examine the latter, providing results of dynamical simulations that explore the stable regions that the eccentric orbit of the HR 5183 giant planet allows to exist within the Habitable Zone of the host star. Our results show that, despite the incredible perturbing influence of the giant planet, there remain a narrow range of locations within the Habitable Zone where terrestrial planets may reside in long-term stable orbits. We discuss the effects of the giant planet on the potential habitability of a stable terrestrial planet, including the modulation of terrestrial planet eccentricities and the periodically spectacular view of the giant planet from the terrestrial planet location.

8 pages, 6 figures, accepted for publication in the Astronomical Journal

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Cited by in corpus (10)

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• Dynamical Packing in the Habitable Zone: The Case of Beta CVn
• The LHS 1678 System: Two Earth-Sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc
• HD 83443c: A highly eccentric giant planet on a 22-year orbit
• An Edge-On Orbit for the Eccentric Long-Period Planet HR 5183 b
• Revised Properties and Dynamical History for the HD 17156 System
• New Dynamical State and Habitability of the HD 45364 Planetary System
• SPORES-HWO. II. Companion Mass Limits and Updated Planet Properties for 120 Future Exoplanet Imaging Targets from 35 yr of Precise Doppler Monitoring
• Dynamical orbital evolution scenarios of the wide-orbit eccentric planet HR 5183b
• Asteroseismology of iota Draconis and Discovery of an Additional Long-Period Companion