The Evolution of Planetary Systems within Star Clusters and Stellar Streams

Stars do not form in isolation, but in clustered environments with other stars. The period of time over which a star remains in its birth environment directly affects the properties of its planetary system. While it is difficult to observe planets within star clusters, it is possible to connect stream stars and isolated stars to their progenitor. In this talk, I will discuss how planetary systems are perturbed by passing stars as they evolve within a star cluster. Through a suite of simulations, I will demonstrate how these perturbations are reflected in stars that can be found in stellar streams and isolated field stars that have since escaped their host cluster. We find that stars near the edges of stellar streams, which have escaped their birth environment early, are more likely to host planetary systems than stars in the centre of the stream. While stars that escape their birth environment late can still host planetary systems, the systems are heavily perturbed with planets having eccentric and inclined orbits.