S319p.19 — The quasar clustering and its evolution in a semi-analytic model based on ultra high-resolution N-body simulations

Date & Time

Aug 10th at 6:00 PM until 6:00 PM




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Author(s): Taira Oogi1, Motohiro Enoki4, Tomoaki Ishiyama2, Masakazu Kobayashi3, Ryu Makiya5, Masahiro Nagashima1

Institution(s): 1. Bunkyo University, 2. Chiba University, 3. Ehime University, 4. Tokyo Keizai University, 5. University of Tokyo

We construct a new version of the Numerical Galaxy Catalog (Nagashima et al. 2005, Enoki et al. 2014), a semi-analytic model of galaxy formation, with state-of-the-art cosmological N-body simulations which are carried on the K computer. The minimum dark halo mass of our simulations is ~1010 Msun, and the box sizes are larger than 560 Mpc/h, and the largest simulation consists of 81923 (550 billion) dark matter particles in a box of 1.12 Gpc/h (Ishiyama et al. 2015). The model includes both galaxy and quasar formations based on the hierarchical structure formation scenario. This model enables us to investigate the large-scale quasar clustering and its evolution from z~5 to z=0 for less luminous quasars as well as more luminous quasars.
In this talk, we present the evolution of the quasar host halo mass distribution, the cross-correlation function of quasars and galaxies, and the quasar bias, and compare these results with current observations. Furthermore, we will show an observational strategy to determine the model prescriptions of quasar formation including their parameters.