Orbital features of distant trans-Neptunian objects induced by giant gaseous clumps

Abstract

Context: The discovery of distant trans-Neptunian objects has led to heated discussions about the structure of the outer Solar System. Aims: We study the dynamical evolution of small bodies from the Hill regions of migrating giant gaseous clumps that form in the outer solar nebula via gravitational fragmentation. We attempt to determine whether the observed features of the orbital distribution of distant trans-Neptunian objects could be caused by this process. Methods: We consider a simple model that includes the Sun, two point-like giant clumps with masses of ~ 10 Jupiter masses, and a set of massless objects initially located in the Hill regions of these clumps. We carry out numerical simulations of the motions of small bodies under gravitational perturbations from two giant clumps that move in elliptical orbits and approach each other. The orbital distribution of these small bodies is compared with the observed distribution of distant trans-Neptunian objects. Results: In addition to the known grouping in longitudes of perihelion, we note new features for observed distant trans-Neptunian objects. The observed orbital distribution points to the existence of two groups of distant trans-Neptunian objects with different dynamical characteristics. We show that the main features of the orbital distribution of distant trans-Neptunian objects can be explained by their origin in the Hill regions of migrating giant gaseous clumps. Small bodies are ejected from the Hill regions when the giant clumps move in high-eccentricity orbits and have a close encounter with each other. Conclusions: The resulting orbital distribution of small bodies in our model and the observed distribution of distant trans-Neptunian objects have similar features.

References in corpus (35)

• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• Gravitational Instabilities in Circumstellar Disks
• Evidence for a Distant Giant Planet in the Solar System
• The Origin of Episodic Accretion Bursts in the Early Stages of Star Formation
• Formation of giant planets by fragmentation of protoplanetary disks
• Clumps in the Outer Disk by Disk Instability: Why They are Initially Gas Giants and the Legacy of Disruption
• Challenges in Forming Planets by Gravitational Instability: Disk Irradiation and Clump Migration, Accretion & Tidal Destructio
• Formation of planets by tidal downsizing of giant planet embryos
• Rapid inward migration of planets formed by gravitational instability
• The Planet Nine Hypothesis
• Origin and Evolution of Short-Period Comets
• Formation of giant planets and brown dwarfs on wide orbits
• Formation of pebble-pile planetesimals
• Kuiper belt: formation and evolution
• OSSOS VI. Striking Biases in the detection of large semimajor axis Trans-Neptunian Objects
• Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1
• Minimum Mass Solar Nebulae and Planetary Migration
• Dynamical relaxation and the orbits of low-mass extrasolar planets
• Dawes Review. The tidal downsizing hypothesis of planet formation
• Dynamical Evolution Induced by Planet Nine
• The migration of gas giant planets in gravitationally unstable discs
• Gravitational fragmentation and formation of giant protoplanets on tens-of-au orbits
• Observational bias and the clustering of distant eccentric Kuiper belt objects
• Consequences of a Distant Massive Planet on the Large Semi-major Axis Trans-Neptunian Objects
• An alternative origin for debris rings of planetesimals
• Testing the isotropy of the Dark Energy Survey's extreme trans-Neptunian objects
• Observational Signatures of a Massive Distant Planet on the Scattering Disk
• Gravitoviscous protoplanetary disks with a dust component. II. Spatial distribution and growth of dust in a clumpy disk
• Shepherding in a Self-Gravitating Disk of Trans-Neptunian Objects
• Chaos in the inert Oort cloud
• Improving the thin-disk models of circumstellar disk evolution. The 2+1-dimensional model
• Perspectives on the distribution of orbits of distant Trans-Neptunian Objects
• Orbital precession in the distant solar system; further constraining the Planet Nine hypothesis with numerical simulations
• Apsidal Clustering following the Inclination Instability
• Migration of giant gaseous clumps and structure of the outer Solar system

Cited by in corpus (2)

• Oort cloud Ecology II: The chronology of the formation of the Oort cloud
• Features of the Dynamical Evolution of a Massive Disk of Trans-Neptunian Objects