# Escape dynamics through a continuously growing leak

## TL;DR

This paper models escape dynamics in a leaky chaotic system with a leak size that depends on the number of particles, relevant to astrophysical planetary accretion, and provides both numerical and analytical insights.

## Contribution

It introduces a model where the leak size varies with particle number and derives an analytical solution, extending understanding of escape dynamics in such systems.

## Key findings

- Early phase shows deviation from exponential decay
- Analytic solution matches classical results in limiting cases
- Model applicable to astrophysical planetary accretion

## Abstract

We formulate a model that describes the escape dynamics in a leaky chaotic system in which the size of the leak depends on the number of the in-falling particles. The basic motivation of this work is the astrophysical process which describes the planetary accretion. In order to study the dynamics generally, the standard map is investigated in two cases when the dynamics is fully hyperbolic and in the presence of KAM islands. In addition to the numerical calculations, an analytic solution to the temporal behavior of the model is also derived. We show that in the early phase of the leak expansion, as long as there are enough particles in the system, the number of survivors deviates from the well-known exponential decay. Furthermore, the analytic solution returns the classical result in the limiting case when the number of particles does not affect the leak size.