期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 505, 期 1, 页码 325-338出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stab1286
关键词
methods: analytical; galaxies: abundances; galaxies: haloes; dark energy; dark matter; large-scale structure of Universe
资金
- U.S.-U.K. Fulbright Commission
- Gruber Science Fellowship
- Science and Technology Facilities Council [ST/L00075X/1, ST/P000541/1]
- Office of Science, Office of High Energy Physics of the U.S. Department of Energy (DOE) [DE-AC02-05CH1123]
- National Energy Research Scientific Computing Center, a DOE Office of Science User Facility
- U.S. National Science Foundation, Division of Astronomical Sciences [AST-0950945]
- Science and Technologies Facilities Council of the United Kingdom
- Gordon and Betty Moore Foundation
- Heising-Simons Foundation
- French Alternative Energies and Atomic Energy Commission (CEA)
- National Council of Science and Technology of Mexico
- Ministry of Economy of Spain
This study constructed a high-fidelity mock galaxy catalogue to simulate the galaxy population properties of DESI BGS targets, providing information about galaxies and their host dark matter subhaloes.
The scientific exploitation of the Dark Energy Spectroscopic Instrument Bright Galaxy Survey (DESI BGS) data requires the construction of mocks with galaxy population properties closely mimicking those of the actual DESI BGS targets. We create a high-fidelity mock galaxy catalogue, including information about galaxies and their host dark matter subhaloes. The mock catalogue uses subhalo abundance matching with scatter to populate the P-Millennium N-body simulation with galaxies at the median BGS redshift of similar to 0.2, using formation redshift information to assign (0.1)(g - r) rest-frame colours. The mock provides information about r-band absolute magnitudes, (0.1)(g - r) rest-frame colours, and 3D positions and velocities of a complete sample of DESI BGS galaxies in a volume of (542 Mpch(-1))(3), as well as the masses of host dark matter haloes. This P-Millennium DESI BGS mock catalogue is ideally suited for the tuning of approximate mocks unable to resolve subhaloes that DESI BGS galaxies reside in, to test for systematics in analysis pipelines and to interpret (non-cosmological focused) DESI BGS analysis.
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