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  4. Beyond - ?CDM constraints from the full shape clustering measurements from BOSS and eBOSS
 
research article

Beyond - ?CDM constraints from the full shape clustering measurements from BOSS and eBOSS

Semenaite, Agne
•
Sanchez, Ariel G.
•
Pezzotta, Andrea
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March 31, 2023
Monthly Notices Of The Royal Astronomical Society

We analyse the full shape of anisotropic clustering measurements from the extended Baryon Oscillation Spectroscopic Survey quasar sample together with the combined galaxy sample from the Baryon Oscillation Spectroscopic Survey. We obtain constraints on the cosmological parameters independent of the Hubble parameter h for the extensions of the Lambda cold dark matter (?CDM) models, focusing on cosmologies with free dark energy equation of state parameter w. We combine the clustering constraints with those from the latest cosmic microwave background data from Planck to obtain joint constraints for these cosmologies for w and the additional extension parameters - its time evolution w(a), the physical curvature density omega(K) and the neutrino mass sum n-ary sumation m(nu). Our joint constraints are consistent with a flat ?CDM cosmological model within 68 per cent confidence limits. We demonstrate that the Planck data are able to place tight constraints on the clustering amplitude today, sigma(12), in cosmologies with varying w and present the first constraints for the clustering amplitude for such cosmologies, which is found to be slightly higher than the ?CDM value. Additionally, we show that when we vary w and allow for non-flat cosmologies and the physical curvature density is used, Planck prefers a curved universe at 4 sigma significance, which is similar to 2 sigma higher than when using the relative curvature density omega(K). Finally, when w is varied freely, clustering provides only a modest improvement (of 0.021 eV) on the upper limit of n-ary sumation m(nu).

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Type
research article
DOI
10.1093/mnras/stad849
Web of Science ID

WOS:000962737000005

Author(s)
Semenaite, Agne
Sanchez, Ariel G.
Pezzotta, Andrea
Hou, Jiamin
Eggemeier, Alexander
Crocce, Martin
Zhao, Cheng  
Brownstein, Joel R.
Rossi, Graziano
Schneider, Donald P.
Date Issued

2023-03-31

Publisher

OXFORD UNIV PRESS

Published in
Monthly Notices Of The Royal Astronomical Society
Volume

521

Issue

4

Start page

5013

End page

5025

Subjects

Astronomy & Astrophysics

•

cosmological parameters

•

large-scale structure of universe

•

oscillation spectroscopic survey

•

survey cosmological implications

•

large-scale structure

•

probe wmap observations

•

galaxy redshift survey

•

final data

•

hubble constant

•

power-spectrum

•

data release

•

universe

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASTRO  
Available on Infoscience
May 8, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/197520
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