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Comparing approximate methods for mock catalogues and covariance matrices II: power spectrum multiples

Research output: Contribution to journalArticlepeer-review

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Comparing approximate methods for mock catalogues and covariance matrices II : power spectrum multiples. / Blot, Linda; Crocce, Martin; Sefusatti, Emiliano; Lippich, Martha; Sánchez, Ariel G.; Colavincenzo, Manuel; Monaco, Pierluigi; Alvarez, Marcelo A.; Agrawal, Aniket; Avila, Santiago; Balaguera-Antolínez, Andrés; Bond, Richard; Codis, Sandrine; Vecchia, Claudio Dalla; Dorta, Antonio; Fosalba, Pablo; Izard, Albert; Kitaura, Francisco-Shu; Pellejero-Ibanez, Marcos; Stein, George; Vakili, Mohammadjavad; Yepes, Gustavo.

In: Monthly Notices of the Royal Astronomical Society, Vol. 485, No. 2, 01.05.2019, p. 2806-2824.

Research output: Contribution to journalArticlepeer-review

Harvard

Blot, L, Crocce, M, Sefusatti, E, Lippich, M, Sánchez, AG, Colavincenzo, M, Monaco, P, Alvarez, MA, Agrawal, A, Avila, S, Balaguera-Antolínez, A, Bond, R, Codis, S, Vecchia, CD, Dorta, A, Fosalba, P, Izard, A, Kitaura, F-S, Pellejero-Ibanez, M, Stein, G, Vakili, M & Yepes, G 2019, 'Comparing approximate methods for mock catalogues and covariance matrices II: power spectrum multiples', Monthly Notices of the Royal Astronomical Society, vol. 485, no. 2, pp. 2806-2824. https://doi.org/10.1093/mnras/stz507

APA

Blot, L., Crocce, M., Sefusatti, E., Lippich, M., Sánchez, A. G., Colavincenzo, M., Monaco, P., Alvarez, M. A., Agrawal, A., Avila, S., Balaguera-Antolínez, A., Bond, R., Codis, S., Vecchia, C. D., Dorta, A., Fosalba, P., Izard, A., Kitaura, F-S., Pellejero-Ibanez, M., ... Yepes, G. (2019). Comparing approximate methods for mock catalogues and covariance matrices II: power spectrum multiples. Monthly Notices of the Royal Astronomical Society, 485(2), 2806-2824. https://doi.org/10.1093/mnras/stz507

Vancouver

Blot L, Crocce M, Sefusatti E, Lippich M, Sánchez AG, Colavincenzo M et al. Comparing approximate methods for mock catalogues and covariance matrices II: power spectrum multiples. Monthly Notices of the Royal Astronomical Society. 2019 May 1;485(2):2806-2824. https://doi.org/10.1093/mnras/stz507

Author

Blot, Linda ; Crocce, Martin ; Sefusatti, Emiliano ; Lippich, Martha ; Sánchez, Ariel G. ; Colavincenzo, Manuel ; Monaco, Pierluigi ; Alvarez, Marcelo A. ; Agrawal, Aniket ; Avila, Santiago ; Balaguera-Antolínez, Andrés ; Bond, Richard ; Codis, Sandrine ; Vecchia, Claudio Dalla ; Dorta, Antonio ; Fosalba, Pablo ; Izard, Albert ; Kitaura, Francisco-Shu ; Pellejero-Ibanez, Marcos ; Stein, George ; Vakili, Mohammadjavad ; Yepes, Gustavo. / Comparing approximate methods for mock catalogues and covariance matrices II : power spectrum multiples. In: Monthly Notices of the Royal Astronomical Society. 2019 ; Vol. 485, No. 2. pp. 2806-2824.

Bibtex

@article{f97fa301a3ba456491e3742a3bf43103,
title = "Comparing approximate methods for mock catalogues and covariance matrices II: power spectrum multiples",
abstract = "We study the accuracy of several approximate methods for gravitational dynamics in terms of halo power spectrum multipoles and their estimated covariance matrix. We propagate the differences in covariances into parameter constraints related to growth rate of structure, Alcock–Paczynski distortions, and biasing. We consider seven methods in three broad categories: algorithms that solve for halo density evolution deterministically using Lagrangian trajectories (ICE–COLA, PINOCCHIO, and PEAKPATCH), methods that rely on halo assignment schemes on to dark matter overdensities calibrated with a target N-body run (HALOGEN, PATCHY), and two standard assumptions about the full density probability distribution function (Gaussian and lognormal). We benchmark their performance against a set of three hundred N-body simulations, running similar sets of approximate simulations with matched initial conditions, for each method. We find that most methods reproduce the monopole to within 5 per cent⁠, while residuals for the quadrupole are sometimes larger and scale dependent. The variance of the multipoles is typically reproduced within 10 per cent⁠. Overall, we find that covariances built from approximate simulations yield errors on model parameters within 10 per cent of those from the N-body-based covariance.",
keywords = "astro-ph.CO, RCUK, STFC, ST/K00283X/1, methods: data analysis, methods: numerical, cosmological parameters, large-scale structure of Universe",
author = "Linda Blot and Martin Crocce and Emiliano Sefusatti and Martha Lippich and S{\'a}nchez, {Ariel G.} and Manuel Colavincenzo and Pierluigi Monaco and Alvarez, {Marcelo A.} and Aniket Agrawal and Santiago Avila and Andr{\'e}s Balaguera-Antol{\'i}nez and Richard Bond and Sandrine Codis and Vecchia, {Claudio Dalla} and Antonio Dorta and Pablo Fosalba and Albert Izard and Francisco-Shu Kitaura and Marcos Pellejero-Ibanez and George Stein and Mohammadjavad Vakili and Gustavo Yepes",
year = "2019",
month = may,
day = "1",
doi = "10.1093/mnras/stz507",
language = "English",
volume = "485",
pages = "2806--2824",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",

}

RIS

TY - JOUR

T1 - Comparing approximate methods for mock catalogues and covariance matrices II

T2 - power spectrum multiples

AU - Blot, Linda

AU - Crocce, Martin

AU - Sefusatti, Emiliano

AU - Lippich, Martha

AU - Sánchez, Ariel G.

AU - Colavincenzo, Manuel

AU - Monaco, Pierluigi

AU - Alvarez, Marcelo A.

AU - Agrawal, Aniket

AU - Avila, Santiago

AU - Balaguera-Antolínez, Andrés

AU - Bond, Richard

AU - Codis, Sandrine

AU - Vecchia, Claudio Dalla

AU - Dorta, Antonio

AU - Fosalba, Pablo

AU - Izard, Albert

AU - Kitaura, Francisco-Shu

AU - Pellejero-Ibanez, Marcos

AU - Stein, George

AU - Vakili, Mohammadjavad

AU - Yepes, Gustavo

PY - 2019/5/1

Y1 - 2019/5/1

N2 - We study the accuracy of several approximate methods for gravitational dynamics in terms of halo power spectrum multipoles and their estimated covariance matrix. We propagate the differences in covariances into parameter constraints related to growth rate of structure, Alcock–Paczynski distortions, and biasing. We consider seven methods in three broad categories: algorithms that solve for halo density evolution deterministically using Lagrangian trajectories (ICE–COLA, PINOCCHIO, and PEAKPATCH), methods that rely on halo assignment schemes on to dark matter overdensities calibrated with a target N-body run (HALOGEN, PATCHY), and two standard assumptions about the full density probability distribution function (Gaussian and lognormal). We benchmark their performance against a set of three hundred N-body simulations, running similar sets of approximate simulations with matched initial conditions, for each method. We find that most methods reproduce the monopole to within 5 per cent⁠, while residuals for the quadrupole are sometimes larger and scale dependent. The variance of the multipoles is typically reproduced within 10 per cent⁠. Overall, we find that covariances built from approximate simulations yield errors on model parameters within 10 per cent of those from the N-body-based covariance.

AB - We study the accuracy of several approximate methods for gravitational dynamics in terms of halo power spectrum multipoles and their estimated covariance matrix. We propagate the differences in covariances into parameter constraints related to growth rate of structure, Alcock–Paczynski distortions, and biasing. We consider seven methods in three broad categories: algorithms that solve for halo density evolution deterministically using Lagrangian trajectories (ICE–COLA, PINOCCHIO, and PEAKPATCH), methods that rely on halo assignment schemes on to dark matter overdensities calibrated with a target N-body run (HALOGEN, PATCHY), and two standard assumptions about the full density probability distribution function (Gaussian and lognormal). We benchmark their performance against a set of three hundred N-body simulations, running similar sets of approximate simulations with matched initial conditions, for each method. We find that most methods reproduce the monopole to within 5 per cent⁠, while residuals for the quadrupole are sometimes larger and scale dependent. The variance of the multipoles is typically reproduced within 10 per cent⁠. Overall, we find that covariances built from approximate simulations yield errors on model parameters within 10 per cent of those from the N-body-based covariance.

KW - astro-ph.CO

KW - RCUK

KW - STFC

KW - ST/K00283X/1

KW - methods: data analysis

KW - methods: numerical

KW - cosmological parameters

KW - large-scale structure of Universe

U2 - 10.1093/mnras/stz507

DO - 10.1093/mnras/stz507

M3 - Article

VL - 485

SP - 2806

EP - 2824

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 2

ER -

ID: 10769132