English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Non-fiducial cosmological test from geometrical and dynamical distortions around voids

Correa, C. M., Paz, D. J., Padilla, N. D., Ruiz, A. N., Angulo, R. E., & Sánchez, A. G. (2019). Non-fiducial cosmological test from geometrical and dynamical distortions around voids. Monthly Notices of the Royal Astronomical Society, 485(4), 5761-5772. doi:10.1093/mnras/stz821.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0004-E5D0-E Version Permalink: http://hdl.handle.net/21.11116/0000-0004-E5D1-D
Genre: Journal Article

Files

show Files
hide Files
:
Non-fiducial cosmological test from geometrical and dynamical distortions around voids.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
Non-fiducial cosmological test from geometrical and dynamical distortions around voids.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Correa, Carlos M., Author
Paz, Dante J., Author
Padilla, Nelson D., Author
Ruiz, Andrés N., Author
Angulo, Raúl E., Author
Sánchez, Ariel G.1, Author              
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

Content

show
hide
Free keywords: -
 Abstract: We present a new cosmological test using the distribution of galaxies around cosmic voids without assuming a fiducial cosmology. The test is based on a physical model for the void–galaxy cross-correlation function projected along and perpendicular to the line of sight. We treat correlations in terms of void-centric angular distances and redshift differences between void–galaxy pairs, hence it is not necessary to assume a fiducial cosmology. This model reproduces the coupled dynamical (Kaiser effect, RSD) and geometrical (Alcock–Paczynski effect, GD) distortions that affect the correlation measurements. It also takes into account the scale mixing due to the projection ranges in both directions. The model is general, so it can be applied to an arbitrary cylindrical binning scheme, not only in the case of the projected correlations. It primarily depends on two cosmological parameters: Ωm, the matter fraction of the Universe today (sensitive to GD), and β, the ratio between the growth rate factor of density perturbations and the tracer bias (sensitive to RSD). In the context of the new generation of galaxy spectroscopic surveys, we calibrated the test using the Millennium XXL simulation for different redshifts. The method successfully recovers the cosmological parameters. We studied the effect of measuring with different projection ranges, finding robust results up to wide ranges. The resulting data covariance matrices are relatively small, which reduces the noise in the Gaussian likelihood analysis and will allow the usage of a smaller number of mock catalogues. The performance evaluated in this work indicates that the developed method is a promising test to be applied on real data.

Details

show
hide
Language(s):
 Dates: 2019-03-27
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/stz821
 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 (4) Sequence Number: - Start / End Page: 5761 - 5772 Identifier: ISSN: 1365-2966
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150