English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Comparing approximate methods for mock catalogues and covariance matrices II: power spectrum multipoles

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

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0004-F1E1-D Version Permalink: http://hdl.handle.net/21.11116/0000-0004-F1E2-C
Genre: Journal Article

Files

show Files
hide Files
:
Comparing approximate methods for mock catalogues and covariance matrices II power spectrum multipoles.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
Comparing approximate methods for mock catalogues and covariance matrices II power spectrum multipoles.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Blot, Linda, Author
Crocce, Martin, Author
Sefusatti, Emiliano, Author
Lippich, Martha1, Author              
Sánchez, Ariel1, Author              
Colavincenzo, Manuel, Author
Monaco, Pierluigi, Author
Alvarez, Marcelo A., Author
Agrawal, Aniket, Author
Avila, Santiago, Author
Balaguera-Antolínez, Andrés, Author
Bond, Richard, Author
Codis, Sandrine, Author
Vecchia, Claudio Dalla, Author
Dorta, Antonio, Author
Fosalba, Pablo, Author
Izard, Albert, Author
Kitaura, Francisco-Shu, Author
Pellejero-Ibanez, Marcos, Author
Stein, George, Author
Vakili, Mohammadjavad, AuthorYepes, Gustavo, Author more..
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

Content

show
hide
Free keywords: -
 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.

Details

show
hide
Language(s):
 Dates: 2019-02-19
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/stz507
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 485 (2) Sequence Number: - Start / End Page: 2806 - 2824 Identifier: ISSN: 1365-2966
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150