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The halo light-cone catalogues of ABACUSSUMMIT

Journal Article · · Monthly Notices of the Royal Astronomical Society
 [1];  [2];  [3];  [3]
  1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  2. Flatiron Institute, New York, NY (United States)
  3. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
+ Show Author Affiliations
We describe a method for generating halo catalogues on the light-cone using the AbacusSummit suite of N-body simulations. The main application of these catalogues is the construction of realistic mock galaxy catalogues and weak lensing maps on the sky. Our algorithm associates the haloes from a set of coarsely spaced snapshots with their positions at the time of light-cone crossing by matching halo particles to on-the-fly light-cone particles. It then records the halo and particle information into an easily accessible product, which we call the AbacusSummit halo light-cone catalogues. Our recommended use of this product is in the halo mass regime of Mhalo > 2.1 x 1011 M⊙ h-1 for the base resolution simulations, i.e. haloes containing at least 100 particles, where the interpolated halo properties are most reliable. To test the validity of the obtained catalogues, we perform various visual inspections and consistency checks. In particular, we construct galaxy mock catalogues of emission-line galaxies (ELGs) at z ~ 1 by adopting a modified version of the AbacusHOD script, which builds on the standard halo occupation distribution (HOD) method by including various extensions. We find that the multipoles of the autocorrelation function are consistent with the predictions from the full-box snapshot, implicitly validating our algorithm. In addition, we compute and output CMB convergence maps and find that the auto- and cross-power spectrum agrees with the theoretical prediction at the sub-per-cent level.
Research Organization:
Harvard University, Cambridge, MA (United States); UT-Battelle LLC/ORNL, Oak Ridge, TN (United States); University of California, Oakland, CA (United States)
Sponsoring Organization:
Harvard University; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Simons Foundation; USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725; SC0013718
OSTI ID:
1979521
Journal Information:
Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 2 Vol. 509; ISSN 0035-8711
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
N-body simulations
cosmology
data analysis
formation
galaxies
haloes
large-scale structure of universe
methods
theory