Planet Occurrence in the M67 Open Cluster

Most stars are born in clusters, but only the most massive of these clusters remain intact for longer than a billion years. The population of planets which form and evolve in such massive cluster environments may show significant differences from planets around field stars. Using data from NASA's K2 mission, we search for planets in the M67 open cluster. M67 has an age of 4 Gyr and a metallicity similar to that of the Sun and field stars in the solar neighborhood, making it an ideal test-bed to study the effects of massive cluster birth environments on planet occurrence. We test whether planets in M67 occur as frequently as those around field stars and compare our results for small planets to previous surveys of this cluster focusing on larger planets.