The Origin of Systems of Tightly Packed Inner Planets with Misaligned, Ultra-Short-Period Companions
arXiv:2009.10745 · doi:10.3847/1538-3881/abbad3
Abstract
Ultra-short period planets provide a window into the inner edge of the parameter space occupied by planetary orbits. In one particularly intriguing class of multi-planet systems, the ultra-short period planet is flanked by short-period companions, and the outer planets occupy a discernibly distinct dynamical state. In the observational database, this phenomenon is represented by a small number of stars hosting systems of tightly packed co-planar planets as well as an ultra-short period planet, whose orbit of is misaligned relative to the mutual plane of the former. In this work, we explore two different mechanisms that can produce an ultra-short period planet that is misaligned with the rest of its compact planetary system: natural decoupling between the inner and outer system via the stellar quadrupole moment, and decoupling forced by an external companion with finely-tuned orbital parameters. These two processes operate with different timescales, and can thus occur simultaneously. In this work, we use the K2-266 system as an illustrative example to elucidate the dynamics of these two processes, and highlight the types of constraints that may arise regarding the dynamical histories of systems hosting ultra-short period planets.
arXiv commentAccepted to AJ
References in corpus (47)
- New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
- Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
- Architecture of Kepler's Multi-transiting Systems: II. New investigations with twice as many candidates
- Validation of Kepler's Multiple Planet Candidates. III: Light Curve Analysis & Announcement of Hundreds of New Multi-planet Systems
- False positive probabilties for all Kepler Objects of Interest: 1284 newly validated planets and 428 likely false positives
- The California-Kepler Survey V. Peas in a Pod: Planets in a Kepler Multi-planet System are Similar in Size and Regularly Spaced
- Stellar Spin-Orbit Misalignment in a Multiplanet System
- Migration then assembly: Formation of Neptune mass planets inside 1 AU
- The Mass-Dependence of Angular Momentum Evolution in Sun-Like Stars
- Protoplanetary disk lifetimes vs stellar mass and possible implications for giant planet populations
- About 30% of Sun-like Stars Have Kepler-like Planetary Systems: A Study of their Intrinsic Architecture
- A Study of the Shortest-Period Planets Found With Kepler
- Exoplanet Orbital Eccentricities Derived From LAMOST-Kepler Analysis
- Calibrating Gyrochronology using Kepler Asteroseismic targets
- Characterizing the Cool KOIs II. The M Dwarf KOI-254 and its Hot Jupiter
- Kepler Multi-Planet Systems Exhibit Unexpected Intra-system Uniformity in Mass and Radius
- Rotation of Low-Mass Stars in Upper Scorpius and Rho Ophiuchus with K2
- The Kepler Dichotomy among the M Dwarfs: Half of Systems Contain Five or More Coplanar Planets
- Obliquities of Kepler Stars: Comparison of Single- and Multiple-Transit Systems
- Magnetic and Gravitational Disk-Star Interactions: An Interdependence of PMS Stellar Rotation Rates and Spin-Orbit Misalignments
- Can planetary instability explain the Kepler dichotomy?
- Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting Mid-M Dwarf Stars
- Period ratios in multi-planetary systems discovered by Kepler are consistent with planet migration
- WASP-80b: a gas giant transiting a cool dwarf
- Migration of two massive planets into (and out of) first order mean motion resonances
- Disk-planets interactions and the diversity of period ratios in Kepler's multi-planetary systems
- Ultra-short-period planets from secular chaos
- The effects of external planets on inner systems: multiplicities, inclinations, and pathways to eccentric warm Jupiters
- Low-Eccentricity Migration of Ultra-Short Period Planets in Multi-Planet Systems
- New values of gravitational moments J2 and J4 deduced from helioseismology
- Spin-orbit Misalignment as a Driver of the Kepler Dichotomy
- Larger mutual inclinations for the shortest-period planets
- CKS VIII: Eccentricities of Kepler Planets and Tentative Evidence of a High Metallicity Preference for Small Eccentric Planets
- The Kepler Dichotomy in Planetary Disks: Linking Kepler Observables to Simulations of Late-Stage Planet Formation
- Magnetic Origins of the Stellar Mass-Obliquity Correlation in Planetary Systems
- Compact planetary systems perturbed by an inclined companion: II. Stellar spin-orbit evolution
- Effects of Unseen Additional Planetary Perturbers on Compact Extrasolar Planetary Systems
- A Compact Multi-Planet System With A Significantly Misaligned Ultra Short Period Planet
- Compact planetary systems perturbed by an inclined companion: I. Vectorial representation of the secular model
- Perturbation of Compact Planetary Systems by Distant Giant Planets
- Mutual Orbital Inclinations Between Cold Jupiters and Inner Super-Earths
- Hidden Planetary Friends: On the Stability Of 2-Planet Systems in the Presence of a Distant, Inclined Companion
- Near-resonance in a system of sub-Neptunes from TESS
- Outer-planet scattering can gently tilt an inner planetary system
- Mutual Inclination Excitation by Stellar Oblateness
- Characterizing Multi-planet Systems with Classical Secular Theory
- Outer Architecture of Kepler-11: Constraints from Coplanarity
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- Formation of Ultra-Short-Period Planets by Obliquity-Driven Tidal Runaway
- Tidal migration of hot Jupiters: introducing the impact of gravity wave dissipation
- A General Origin for Multi-Planetary Systems With Significantly Misaligned USP Planets
- A CHEOPS-enhanced view of the HD3167 system
- Systematic search for long-term transit duration changes in Kepler transiting planets
- Mutual Inclination of Ultra-Short-Period Planets with Time Varying Stellar J2-moment
- The distribution of mutual inclinations arising from the stellar quadrupole moment
- Planets Across Space and Time (PAST). VI. Age Dependence of the Occurrence and Architecture of Ultra-Short-Period Planet Systems
- Evolution of the Planetary Obliquity: The Eccentric Kozai-Lidov Mechanism Coupled with Tide
- Hiding Planets Near and Far: The Parameter Space of Hidden Companions for Known Planetary Systems
- The Formation of Double Hot Jupiter Systems through von Zeipel-Lidov-Kozai Migration
- Planetary Obliquity Excitation Through Pre-Main Sequence Stellar Evolution
- An internal heating mechanism operating in ultra-short-period planets orbiting magnetically active stars