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Redshift-Space Distortions and f(z) from Group-Galaxy Correlations

Published online by Cambridge University Press:  12 October 2016

F. G. Mohammad ,
S. de la Torre ,
L. Guzzo ,
D. Bianchi  and
J. A. Peacock
F. G. Mohammad
Affiliation:
INAF-Osservatorio Astronomico di Brera INAF-Osservatorio Astronomico di Brera, IT-23807, Merate (LC), Italy email: faizan.mohammad@brera.inaf.it
S. de la Torre
Affiliation:
LAM - Laboratoire dAstrophysique de Marseille, 13388 Marseille France
L. Guzzo
Affiliation:
INAF-Osservatorio Astronomico di Brera INAF-Osservatorio Astronomico di Brera, IT-23807, Merate (LC), Italy email: faizan.mohammad@brera.inaf.it
D. Bianchi
Affiliation:
INAF-Osservatorio Astronomico di Brera INAF-Osservatorio Astronomico di Brera, IT-23807, Merate (LC), Italy email: faizan.mohammad@brera.inaf.it
J. A. Peacock
Affiliation:
Institute for Astronomy-The University of Edinburgh, Edinburgh EH9 3HJ, U.K.
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Abstract

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We investigate the accuracy achievable on measurements of the the growth rate of structure f(z) using redshift-space distortions (RSD), when (a) these are measured on the group-galaxy cross correlation function; (b) the latter is expanded over a modified version of the conventional spherical armonics, “truncated multipole moments”. Simulation results give first indications that this combination can push systematic errors on f(z) below 3%, using scales r ⩾ 10h −1 Mpc.

Keywords

Large-scale structurecosmological parametersclustering

References

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