1. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands
2. National Astronomical Observatories and Key Laboratory of Computational Astrophysics, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, P.R. China
3. Kavli Institute for Astronomy and Astrophysics, Peking University, 5 Yi He Yuan Road, Haidian District, Beijing 100871, P.R. China
4. Department of Mathematical Sciences, Xi'an Jiaotong-Liverpool University (XJTLU), 111 Ren'ai Road, Dushu Lake Higher Education Town, Suzhou Industrial Park, Suzhou 215123, P.R. China
5. Zentrum für Astronomie, Astronomisches Rechen-Institut, University of Heidelberg, Mönchhofstrasse 12-14, D-69120 Heidelberg, Germany