I study stars, their atmospheres, their activity and their planets, and also work on SETI. I am Project Scientist for NEID, a PI of NExSS, a co-PI of MINERVA, and a member of the Habitable Zone Planet Finder team.
I teach at the University Park campus, and have an active research group of students and postdocs.
I also maintain:
The Exoplanet Orbit Database and Exoplanet Data Explorer at exoplanets.org: a powerful guide to the orbits of known exoplanets. Check it out!
The RVLIN and BOOTTRAN packages of IDL routines for efficiently fitting multiple Keplerian curves to radial velocity data, and extracting accurate uncertainties for orbital parameters, including transit times.