Effects of a free-floating planet over small body populations of planetary systems

AGUSTIN DUGARO; LUCIANO A.DARRIBA; MACARENA ZANARDI; GONZALO CARLOS DE ELIA

Montevideo

Congreso; Asteorids, Comets and Meteors; 2017

Universidad de la Republica

The discovery of free-floating planets (FFPs) several years ago proposes a new and interesting study scenario. This consist in studying the interaction between a FFP and an already existing planetary system. In this scenario, the system is created in a tight cluster and captures the FFP. In this work we present the results of studying the interaction of a FFP over a small bodies population. For this research, we analyzed different scenarios configuration. These configurations consist of a Sun-like star, a giant planet with Jupiter-like mass and orbital elements, a FFP with an initial parabolic orbit, and a disk of small bodies with semimajor axes ranging between 6 au and 30 au. In order to have a better description of the effects over the small bodies population, we assume different masses for the FFP, as well as different values of the initial impact parameter and the inclination of the orbital plane with respect to the small bodies disk midplane. We found that, among a wide range of trajectory types, that the most probable outcome for the FFP is a fly-by orbit, in which the FFP mantains an average parabolic orbit until it is sufficiently far from the star to be considered ejected from the system. We focused the study then on the effect of a FFP on a fly-by orbit.