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The halo light cone catalogues of AbacusSummit

Hadzhiyska, Boryana; Garrison, Lehman H; Eisenstein, Daniel; Bose, Sownak

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Boryana Hadzhiyska

Lehman H Garrison

Daniel Eisenstein


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 × 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.


Hadzhiyska, B., Garrison, L. H., Eisenstein, D., & Bose, S. (2022). The halo light cone catalogues of AbacusSummit. Monthly Notices of the Royal Astronomical Society, 509(2), 2194-2208.

Journal Article Type Article
Acceptance Date Oct 19, 2021
Online Publication Date Oct 22, 2021
Publication Date 2022-01
Deposit Date Dec 8, 2021
Publicly Available Date Dec 8, 2021
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 509
Issue 2
Pages 2194-2208


Published Journal Article (4.1 Mb)

Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021, The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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