Work

Lower Growth Rate from Recent Redshift Space Distortion Measurements than Expected from Planck

Year: 2013

Type: article

Abstract: We perform a metastudy of recently published redshift space distortion (RSD) measurements of the cosmological growth rate, f(z)σ8(z). We analyze the latest results from the 6dFGS, BOSS, LRG, WiggleZ, and VIPERS galaxy redshift surveys, and compare the measurements to expectations from Planck. In this Letter we point out that the RSD measurements are consistently lower than the values expected from Planck, and the relative scatter between the RSD measurements is lower than expected. A full resolution of this issue may require a more robust treatment of nonlinear effects in RSD models, although the trend for a low σ8 agrees with recent constraints on σ8 and Ω(m) from Sunyaev-Zeldovich cluster counts identified in Planck.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.111.161301

Authors: E. Macaulay, I. K. Wehus, H. K. Eriksen

Institutions: University of Sussex, University of Oxford, Jet Propulsion Laboratory, University of Oslo

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Aeronautics and Space Administration, California Institute of Technology, Leverhulme Trust, Jet Propulsion Laboratory, Science and Technology Facilities Council

OpenAlex ID: W2051737331

FWCI: 7.034

Cites: 33

Cited by: 311

Related to: 9