The MICE Grand Challenge Lightcone Simulation II: Halo and Galaxy catalogues

M. Crocce; F. J. Castander; E. Gaztanaga; P. Fosalba; J. Carretero

doi:10.1093/mnras/stv1708

paper

The MICE Grand Challenge Lightcone Simulation II: Halo and Galaxy catalogues

arXiv:1312.2013 · doi:10.1093/mnras/stv1708

Abstract

This is the second in a series of three papers in which we present an end-to-end simulation from the MICE collaboration, the MICE Grand Challenge (MICE-GC) run. The N-body contains about 70 billion dark-matter particles in a $(3 h^{- 1} Gpc)^{3}$ comoving volume spanning 5 orders of magnitude in dynamical range. Here we introduce the halo and galaxy catalogues built upon it, both in a wide ( $5000 deg^{2}$ ) and deep ( $z < 1.4$ ) light-cone and in several comoving snapshots. Halos were resolved down to few $1 0^{11} h^{- 1} M_{⊙}$ . This allowed us to model galaxies down to absolute magnitude M $_{r} < - 18.9$ . We used a new hybrid Halo Occupation Distribution and Abundance Matching technique for galaxy assignment. The catalogue includes the Spectral Energy Distributions of all galaxies. We describe a variety of halo and galaxy clustering applications. We discuss how mass resolution effects can bias the large scale $2$ -pt clustering amplitude of poorly resolved halos at the $≲ 5%$ level, and their $3$ -pt correlation function. We find a characteristic scale dependent bias of $≲ 6%$ across the BAO feature for halos well above $M_{⋆} \sim 1 0^{12} h^{- 1} M_{⊙}$ and for LRG like galaxies. For halos well below $M_{⋆}$ the scale dependence at $100 Mpc h^{- 1}$ is $≲ 2%$ . Lastly we discuss the validity of the large-scale Kaiser limit across redshift and departures from it towards nonlinear scales. We make the current version of the light-cone halo and galaxy catalogue (MICECATv1.0) publicly available through a dedicated web portal, http://cosmohub.pic.es, to help develop and exploit the new generation of astronomical surveys.

Version published in MNRAS. 20 pages, 21 figures. MICE-GC halo and galaxy wide area (5000 sq deg) and deep (z<1.4) light-cone catalogue publicly available at http://cosmohub.pic.es

The MICE Grand Challenge Lightcone Simulation II: Halo and Galaxy catalogues

Abstract

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