1. Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, D-85748 Garching bei München, Germany
2. CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China,Hefei 230026, China
3. School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China
4. Istituto Nazionale di Astrofisica (INAF) – Osservatorio Astrofisico di Firenze, Largo Enrico Fermi 5, I-50125 Firenze, Italy
5. Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
6. National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
7. Dipartimento di Fisica e Astronomia, Universitá di Bologna, viale Berti Pichat 6/2, I-40127 Bologna, Italy
8. INAF – Osservatorio Astronomico di Bologna, via Ranzani 1, I-40127 Bologna, Italy
9. Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories (NAOC), Chinese Academy of Sciences,Datun Rd 20A, Beijing 100012, China