Institution: | Max-Planck-Institute für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany;School of Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane, Hatfield AL10 9AB;School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT;CEA/Saclay, Service d'Astrophysique, L'Orme des Merisiers, Bât. 709, 91 191 Gif-sur-Yvette Cedex, France |