This joint fellowship is intended for candidates whose research would benefit from the collaborators and resources available at both Carnegie and Caltech. The Fellow will split their time between the Carnegie Observatories in Pasadena, and Caltech's Cahill Center for Astronomy and Astrophysics. The Theory Fellow is expected to carry out original research in any area of astrophysics, either independently or in collaboration with staff, faculty or students at the host institutions. The principal selection criteria will be outstandi...