Solving the Puzzle of Subhalo Spins

This work was supported by the NSFC projects (grant Nos. 11473053, 11121062, 11233005, U1331201), the National Key Basic Research Program of China (grant No. 2015CB857001), and the “Strategic Priority Research Program the Emergence of Cosmological Structures” of the Chinese Academy of Sciences (grant No. XDB09010000). Y.W. was supported by the EC framework 7 research exchange program LACEGAL. H.L. acknowledges a fellowship from the European Commissions Framework Programme 7, through the Marie Curie Initial Training Network CosmoComp (PITN-GA-2009–238356). S.I. M. acknowledges the support of the STFC Studentship Enhancement Programme (STEP) and the support of a STFC consolidated grant (ST/K001000/1) to the astrophysics group at the University of Leicester. Part of the simulations in this paper were performed on the High Performance Computing (HPC) facilities at the University of Nottingham (www.nottingham.ac. uk/hpc). This work also made use of the High Performance Computing Resource in the Core Facility for Advanced Research Computing at Shanghai Astronomical Observatory.