# On the Dynamics of Comets in Extrasolar Planetary Systems

## TL;DR

This paper investigates the orbital dynamics of hypothetical comets in extrasolar systems with Jupiter-like planets using computer simulations, providing insights into how comets behave in different star-planet configurations.

## Contribution

It presents the first detailed simulation-based analysis of exocomet dynamics in multiple star-planet systems, highlighting the influence of giant planets on cometary orbits.

## Key findings

- Jupiter-like planets significantly alter incoming comet trajectories.
- Cometary orbits are highly sensitive to planetary configurations.
- Exocomets can be perturbed into star-crossing paths by giant planets.

## Abstract

Since very recently, we acquired knowledge on the existence of comets in extrasolar planetary systems. The formation of comets together with planets around host stars now seems evident. As stars are often born in clusters of interstellar clouds, the interaction between the systems will lead to the exchange of material at the edge of the clouds. Therefore, almost every planetary system should have leftover remnants as a result of planetary formation in form of comets at the edges of those systems. These Oort clouds around stars are often disturbed by different processes (e.g., galactic tides, passing stars, etc.), which consequently scatter bodies from the distant clouds into the system close to the host star. Regarding the Solar System, we observe this outcome in the form of cometary families. This knowledge supports the assumption of the existence of comets around other stars. In the present work, we study the orbital dynamics of hypothetical exocomets, based on detailed computer simulations, in three star-planet systems, which are: HD~10180, 47~UMa, and HD~141399. These systems host one or more Jupiter-like planets, which change the orbits of the incoming comets in characteristic ways.