Close encounters between stars can lead to planet exchange, so some planets can be captured by stars with orbits in the opposite direction of the objects that formed in situ. One of the main possibilities is that these planets are captured in mean motion resonance configurations, i.e. the orbital periods of these bodies are related through a ratio of integers. Nu Octantis is one of the extrasolar systems that probably hosts a retrograde planet. The system is composed of two stars and a planet with an uncertain orbital configuration between them. In this talk, we will present some results that may be used to identify retrograde resonances between extrasolar planets. Additionally, we will explore the possible planetary configurations of the Nu Octantis system.
Organized by: Catarina Cosme