Institution: | Department of Astronomy, Graduate School of Science, Kitashirakawa-Oiwakecho, Sakyu-ku, Kyoto 606-8502, Japan;Institut für Theoretische Physik und Astrophysik, Leibnizstraße 15, 24118 Kiel, Germany;Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA |