1. Astrophysics Group, Department of Physics and Astronomy, University of Exeter , Stocker Road, Exeter EX4 4QL, UK
2. Astronomy Department, University of Michigan , Ann Arbor, MI 48109, USA
3. Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
4. Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road NW, Washington, DC 20015, USA
5. Department of Astronomy, University of Florida , Gainesville, FL 32611, USA
6. Steward Observatory, Department of Astronomy, University of Arizona , 933 North Cherry Avenue, Tucson, AZ, 85721, USA
7. The CHARA Array of Georgia State University , Mount Wilson Observatory, Mount Wilson, CA 91023, USA
8. European Southern Observatory , Casilla 19001, Santiago 19, Chile
9. Institut de Planetologie et d’Astrophysique de Grenoble , F-38058 Grenoble, France