Dust production through collisions between small bodies: an application to the G-ring arc

Abstract

The G-ring arc of Saturn, confined by the 7:6 corotation eccentric resonance with Mimas, is primarily composed of micrometric particles. These particles, significantly influenced by the solar radiation pressure, are subject to rapid depletion. This study investigates a mechanism for dust replenishment in the arc, specifically analyzing collisions between macroscopic bodies and the satellite Aegaeon. Utilizing N-body and Smoothed particle hydrodynamics (SPH) simulations, we assess the dust generation from these impacts, with a focus on the most likely collision parameters derived from the N-body simulations. Our findings indicate that, while collisions among macroscopic bodies are inefficient for dust production, impacts involving Aegaeon are substantially more effective, providing conservative lower limits for dust generation. This mechanism, in conjunction with the natural decay processes and continuous dust generation from impacts, potentially keeps the arc population over thousands of years with a possible variation in brightness.

References in corpus (14)

• REBOUND: An open-source multi-purpose N-body code for collisional dynamics
• Catastrophic disruptions revisited
• IAS15: A fast, adaptive, high-order integrator for gravitational dynamics, accurate to machine precision over a billion orbits
• Collisions between Gravity-Dominated Bodies: 2. The Diversity of Impact Outcomes during the End Stage of Planet Formation
• Collisions Between Gravity-Dominated Bodies: 1. Outcome Regimes and Scaling Laws
• A smooth particle hydrodynamics code to model collisions between solid, self-gravitating objects
• Aegaeon (Saturn LIII), a G-ring object
• Coupling between corotation and Lindblad resonances in the elliptic planar three-body problem
• Effects of immersed moonlets in the ring arc particles of Saturn
• Production and fate of the G ring arc particles due to Aegaeon (Saturn LIII)
• Derivation of Capture Probabilities for the Corotation Eccentric Mean Motion Resonances
• Dynamical stability in the vicinity of Saturnian small moons. The cases of Aegaeon, Methone, Anthe and Pallene
• Formation of the G-ring arc
• Dynamics of multiple bodies in a corotation resonance: Conserved quantities and relevance to ring arcs