Constraining galaxy–halo connection with high-order statistics

Journal Article · 30 July 2022 · Monthly Notices of the Royal Astronomical Society

DOI: https://doi.org/10.1093/mnras/stac2147 · OSTI ID:1882985

Zhang, Hanyu ; Samushia, Lado; Brooks, David; de la Macorra, Axel; Doel, Peter; Gaztañaga, Enrique; Gontcho A Gontcho, Satya ; Honscheid, Klaus; Kehoe, Robert; Kisner, Theodore; Meisner, Aaron; Poppett, Claire; Schubnell, Michael; Tarle, Gregory; Zhang, Kai; Zou, Hu

ABSTRACT We investigate using three-point statistics in constraining the galaxy–halo connection. We show that for some galaxy samples, the constraints on the halo occupation distribution parameters are dominated by the three-point function signal (over its two-point counterpart). We demonstrate this on mock catalogues corresponding to the Luminous red galaxies (LRGs), Emission-line galaxies (ELGs), and quasars (QSOs) targeted by the Dark Energy Spectroscopic Instrument (DESI) Survey. The projected three-point function for triangle sides less up to 20 h−1 Mpc measured from a cubic Gpc of data can constrain the characteristic minimum mass of the LRGs with a preci sion of 0.46 per cent. For comparison, similar constraints from the projected two-point function are 1.55 per cent. The improvements for the ELGs and QSOs targets are more modest. In the case of the QSOs, it is caused by the high shot-noise of the sample, and in the case of the ELGs, it is caused by the range of halo masses of the host haloes. The most time-consuming part of our pipeline is the measurement of the three-point functions. We adopt a tabulation method, proposed in earlier works for the two-point function, to significantly reduce the required compute time for the three-point analysis.

• Research Organization: Kansas State Univ., Manhattan, KS (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
• Sponsoring Organization: French Alternative Energies and Atomic Energy Commission; Gordon and Betty Moore Foundation; Heising-Simons Foundation; NASA; National Aeronautics and Space Administration (NASA); National Council of Science and Technology, Mexico; National Science Foundation; National Science Foundation (NSF); Science and Technology Facilities Council; Shota Rustaveli National Science Foundation; USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: AC02-05CH11231; SC0011840; SC0019193; SC0021165
• OSTI ID: 1882985
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 4 Vol. 515; ISSN 0035-8711
• Publisher: Oxford University PressCopyright Statement
• Country of Publication: United Kingdom
• Language: English