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Status: Bibliographieeintrag

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Verfasst von:Castro, Tiago Batalha de [VerfasserIn]   i
 Amendola, Luca [VerfasserIn]   i
 Jahnke, Knud [VerfasserIn]   i
 Seidel, Gregor [VerfasserIn]   i
 Maturi, Matteo [VerfasserIn]   i
 Sakr, Ziad [VerfasserIn]   i
Titel:Euclid preparation
Titelzusatz:XXIV. Calibration of the halo mass function in Λ(ν)CDM cosmologies
Verf.angabe:Euclid collaboration: T. Castro, L. Amendola, K. Jahnke, G. Seidel, M. Maturi, Z. Sakr [und viele weitere]
E-Jahr:2023
Jahr:14 March 2023
Umfang:25 S.
Illustrationen:Illustrationen
Fussnoten:Gesehen am 06.10.2023
Titel Quelle:Enthalten in: Astronomy and astrophysics
Ort Quelle:Les Ulis : EDP Sciences, 1969
Jahr Quelle:2023
Band/Heft Quelle:671(2023) vom: März, Artikel-ID A100, Seite 1-25
ISSN Quelle:1432-0746
Abstract:Euclid’s photometric galaxy cluster survey has the potential to be a very competitive cosmological probe. The main cosmological probe with observations of clusters is their number count, within which the halo mass function (HMF) is a key theoretical quantity. We present a new calibration of the analytic HMF, at the level of accuracy and precision required for the uncertainty in this quantity to be subdominant with respect to other sources of uncertainty in recovering cosmological parameters from Euclid cluster counts. Our model is calibrated against a suite of N-body simulations using a Bayesian approach taking into account systematic errors arising from numerical effects in the simulation. First, we test the convergence of HMF predictions from different N-body codes, by using initial conditions generated with different orders of Lagrangian Perturbation theory, and adopting different simulation box sizes and mass resolution. Then, we quantify the effect of using different halo finder algorithms, and how the resulting differences propagate to the cosmological constraints. In order to trace the violation of universality in the HMF, we also analyse simulations based on initial conditions characterised by scale-free power spectra with different spectral indexes, assuming both Einstein-de Sitter and standard ΛCDM expansion histories. Based on these results, we construct a fitting function for the HMF that we demonstrate to be sub-percent accurate in reproducing results from 9 different variants of the ΛCDM model including massive neutrinos cosmologies. The calibration systematic uncertainty is largely sub-dominant with respect to the expected precision of future mass-observation relations; with the only notable exception of the effect due to the halo finder, that could lead to biased cosmological inference.
DOI:doi:10.1051/0004-6361/202244674
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext: https://doi.org/10.1051/0004-6361/202244674
 kostenfrei: Volltext: https://www.aanda.org/articles/aa/abs/2023/03/aa44674-22/aa44674-22.html
 DOI: https://doi.org/10.1051/0004-6361/202244674
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1860858449
Verknüpfungen:→ Zeitschrift

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