The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 40 Issue 2
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- Pages.29.3-30
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- 2015
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- 1226-2692(pISSN)
Mock Galaxy Catalogs from the Horizon Run 4 Simulation with the Most Bound Halo Particle - Galaxy orrespondence Method
- Hong, Sungwook E. (School of Physics, Korea Institute for Advanced Study) ;
- Park, Changbom (School of Physics, Korea Institute for Advanced Study) ;
- Kim, Juhan (Center for Advanced Computation, Korea Institute for Advanced Study)
- Published : 2015.10.15
Abstract
We introduce an advanced one-to-one galaxy correspondence method that populates dark matter halos with galaxies by tracing merging histories of most bound member particles (MBPs) identified in simulated virialized halos. To estimate the survival time of a satellite galaxy, we adopt several models of tidal-destruction time derived from an analytic calculation, isolated galaxy simulations, and cosmological simulations. We build mock galaxy samples for each model by using a merging tree information of MBPs from our new Horizon Run 4 N-body simulation from z = 12 to 0. For models of galaxy survival time derived from cosmological and isolated galaxy simulations, about 40% of satellites galaxies merged into a certain halo are survived until z = 0. We compare mock galaxy samples from our MBP-galaxy correspondence scheme and the subhalo-galaxy scheme with SDSS volume-limited galaxy samples around z = 0 with
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