Resonant mechanisms that produce near-Sun asteroids
arXiv:2304.00561 · doi:10.1093/mnras/stad862
Abstract
All near-Earth asteroids (NEAs) that reach sufficiently small perihelion distances will undergo a so-called super-catastrophic disruption. The mechanisms causing such disruptions are currently unknown or, at least, undetermined. To help guide theoretical and experimental work to understand the disruption mechanism, we use numerical simulations of a synthetic NEA population to identify the resonant mechanisms that are responsible for driving NEAs close to the Sun, determine how these different mechanisms relate to their dynamical lifetimes at small heliocentric distances and calculate the average time they spend at different heliocentric distances. Typically, resonances between NEAs and the terrestrial and giant planets are able to dramatically reduce the perihelion distances of the former. We developed an algorithm that scans the orbital evolution of asteroids and automatically identifies occurrences of mean motion and secular resonances. We find that most near-Sun asteroids are pushed to small perihelion distances by the 3:1J and 4:1J mean-motion resonances with Jupiter, as well as the secular resonances v6, v5,v3 and v4. The time-scale of the small-perihelion evolution is fastest for the 4:1J, followed by the 3:1J, while v5 is the slowest.~7% of the test asteroids were not trapped in a resonance during the latest stages of their dynamical evolution, which suggests that the secular oscillation of the eccentricity due to the Kozai mechanism, a planetary close encounter or a resonance that we have not identified pushed them below the estimated average disruption distance.
arXiv comment20 pages
References in corpus (15)
- Hot Jupiters from Secular Planet--Planet Interactions
- Secular Dynamics in Hierarchical Three-Body Systems
- On the Formation of Hot Jupiters in Stellar Binaries
- Debiased orbit and absolute-magnitude distributions for near-Earth objects
- Resonant Post-Newtonian Eccentricity Excitation in Hierarchical Three-body Systems
- The Eccentric Kozai Mechanism for a Test Particle
- Long-Term Cycling of Kozai-Lidov Cycles: Extreme Eccentricities and Inclinations Excited by a Distant Eccentric Perturber
- Eccentricity growth and orbit flip in coplanar hierarchical three body systems
- Debiased albedo distribution for Near Earth Objects
- The Albedo Distribution of Near Earth Asteroids
- Dynamical Evolution and Thermal History of Asteroids (3200) Phaethon and (155140) 2005 UD
- Volatility of Sodium in Carbonaceous Chondrites at Temperatures Consistent with Low-Perihelia Asteroids
- Supercatastrophic disruption of asteroids in the context of SOHO comet, fireball and meteor observations
- Thermal Alteration and Differential Sublimation Can Create Phaethons "Rock Comet" Activity and Blue Color
- SHINeS: Space and High-Irradiance Near-Sun Simulator