Astrolunch - 16th January

David T F Weldrake (Max Planck Institut für Astronomie):
Searching for Transiting Extrasolar Planets

Over the last decade, more than 200 extrasolar planets have been discovered, mainly from radial velocity observations of bright nearby stars. Many of these are "Hot Jupiter" planets; gas giants with orbital periods of only a few days. Each Hot Jupiter has a ~10% chance of having an edge-on orbit, hence can transit across the face of it's host star. The identification of transiting planets is of great importance for studies into planetary formation and evolution, allowing determination of the true planetary mass, the planetary radius and density, as well as placing limits on the presence of satellites and rings. This talk shall describe transiting planets, detailing how best to find them and how to differentiate them from other transiting systems, presenting results from an ongoing deep survey towards the Lupus Galactic plane as an example.