Three-body resonance in meteoroid streams

TL;DR

This paper identifies and analyzes a novel three-body resonance involving meteoroids, Jupiter, and Saturn in the Perseid stream, revealing stable, long-lasting dust trails that influence meteor activity near Earth.

Contribution

It presents the first theoretical example of a stable three-body resonance mechanism in meteoroid streams involving Jupiter and Saturn.

Findings

Long-term three-body resonances can last about 2 kyr.

Resonant dust trails can approach Earth in specific years.

The resonance ratio is approximately 1:4:10 for Perseid particles, Saturn, and Jupiter.

Abstract

Mean-motion resonances play an important role in the evolution of various meteoroid streams. Previous works have studied the effects of two-body resonances in different comets and streams. These already established two-body resonances were mainly induced either by Jovian or Saturnian effects but not both at the same time. Some of these resonances have led to spectacular meteor outbursts and storms in the past. In this work, we find a new resonance mechanism involving three bodies -- i.e. meteoroid particle, Jupiter and Saturn, in the Perseid meteoroid stream. Long-term three-body resonances are not very common in real small bodies in our solar system although they can mathematically exist at many resonant sweet spots in an abstract sense in any dynamical system. This particular resonance combination in the Perseid stream is such that it is close to the ratio of 1:4:10 if the orbital periods of Perseid particle, Saturn and Jupiter are considered respectively. These resonant Perseid meteoroids stay resonant for typically about 2 kyr. Highly compact dust trails due to this unique resonance phenomenon are present in our simulations. Some past and future years are presented where three-body resonant meteoroids of different sizes (or subject to different radiation pressures) are computed to come near the Earth. This is the first theoretical example of an active and stable three-body resonance mechanism in the realm of meteoroid streams.