Signatures of a Distant Planet on the Inclination Distribution of the Detached Kuiper Belt

Abstract

A distant, massive planet in the outer solar system has recently been proposed to explain some observed features of extreme trans-Neptunian objects (TNOs). Here we use N-body simulations of the formation of the Kuiper belt and Oort cloud as well as a survey simulator to compare models of the solar system with and without a 9th planet to one another as well as to observations. The main mechanism for TNOs to be deposited into the distant ($a$ > au), detached ($q$ > au) region of the Kuiper Belt in the 8-planet model is Kozai-Lidov oscillation of objects in mean motion resonances (MMR) with Neptune. This effect does not deposit low-inclination ($i\lesssim$ 20°) objects into this region. However, we find that the 9th planet generates a group of distant, detached TNOs at low inclinations that are not present in the 8-planet model. This disparity between the 8-planet and the 9-planet models could provide a strong constraint on a possible planet 9 with further detections of TNOs in the distant, detached region of the Kuiper Belt.

arXiv comment8 pages, 3 figures, accepted to ApJL

References in corpus (27)

• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Evidence for a Distant Giant Planet in the Solar System
• Statistical Study of the Early Solar System's Instability with 4, 5 and 6 Giant Planets
• The Canada-France Ecliptic Plane Survey - Full Data Release: The orbital structure of the Kuiper belt
• The Planet Nine Hypothesis
• Young Solar System's Fifth Giant Planet?
• The Evidence for Slow Migration of Neptune from the Inclination Distribution of Kuiper Belt Objects
• OSSOS. VII. 800+ trans-Neptunian objects - the complete data release
• Neptune's Orbital Migration Was Grainy, Not Smooth
• Jumping Neptune Can Explain the Kuiper Belt Kernel
• Sedna and the Oort Cloud Around a Migrating Sun
• Observational constraints on the orbit and location of Planet Nine in the outer solar system
• Injection of Oort Cloud Comets: The Fundamental Role of Stellar Perturbations
• A carefully characterised and tracked Trans-Neptunian survey, the size-distribution of the Plutinos and the number of Neptunian Trojans
• Tracking Neptune's Migration History through High-Perihelion Resonant Trans-Neptunian Objects
• OSSOS III - Resonant Trans-Neptunian Populations: Constraints from the first quarter of the Outer Solar System Origins Survey
• An Oort cloud origin for the high-inclination, high-perihelion Centaurs
• Generation of Highly Inclined Trans-Neptunian Objects by Planet Nine
• OSSOS. VIII. The Transition Between Two Size Distribution Slopes in the Scattering Disk
• The Canada-France Ecliptic Plane Survey (CFEPS) - High Latitude Component
• The orbital distribution of trans-Neptunian objects beyond 50 au
• Dynamical Evolution Induced by Planet Nine
• The 5:1 Neptune Resonance as Probed by CFEPS: Dynamics and Population
• OSSOS XV: Probing the Distant Solar System with Observed Scattering TNOs
• The Secular Dynamics of TNOs and Planet Nine Interactions
• The Generation of the Distant Kuiper Belt by Planet Nine from an Initially Broad Perihelion Distribution
• Stability of Neptune's distant resonances in the presence of Planet Nine

Cited by in corpus (2)

• On the origin of extreme trans-Neptunian objects within Modified Newtonian Dynamics
• A Non-Primordial Origin for the Widest Binaries in the Kuiper Belt