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Rosella: a mock catalogue from the P-Millennium simulation

Safonova, Sasha; Norberg, Peder; Cole, Shaun

Rosella: a mock catalogue from the P-Millennium simulation Thumbnail


Authors

Sasha Safonova



Abstract

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 ∼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 Mpc h−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.

Citation

Safonova, S., Norberg, P., & Cole, S. (2021). Rosella: a mock catalogue from the P-Millennium simulation. Monthly Notices of the Royal Astronomical Society, 505(1), 325-338. https://doi.org/10.1093/mnras/stab1286

Journal Article Type Article
Acceptance Date Apr 27, 2021
Online Publication Date May 6, 2021
Publication Date 2021-07
Deposit Date Sep 21, 2021
Publicly Available Date Mar 28, 2024
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 505
Issue 1
Pages 325-338
DOI https://doi.org/10.1093/mnras/stab1286

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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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