Constraining omega and bias from the Stromlo-APM survey

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Galaxy redshift surveys provide a distorted picture of the universe due to the non-Hubble component of galaxy motions. By measuring such distortions in the linear regime one can constrain the quantity {beta} = {Omega}{sup 0.6} where {Omega} is the cosmological density parameter and b is the (linear) bias factor for optically-selected galaxies. In this paper we estimate {beta} from the Stromlo-APM redshift survey by comparing the amplitude of the direction-averaged redshift space correlation function to the real space correlation function. We find a 95% confidence upper limit of {beta} = 0.75, with a `best estimate` of {beta} {approx} 0.48. A ... continued below

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8 p.

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Loveday, J. May 1, 1995.

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Description

Galaxy redshift surveys provide a distorted picture of the universe due to the non-Hubble component of galaxy motions. By measuring such distortions in the linear regime one can constrain the quantity {beta} = {Omega}{sup 0.6} where {Omega} is the cosmological density parameter and b is the (linear) bias factor for optically-selected galaxies. In this paper we estimate {beta} from the Stromlo-APM redshift survey by comparing the amplitude of the direction-averaged redshift space correlation function to the real space correlation function. We find a 95% confidence upper limit of {beta} = 0.75, with a `best estimate` of {beta} {approx} 0.48. A bias parameter b {approx} 2 is thus required if {Omega} {equivalent_to} 1. However, higher-order correlations measured from the APM galaxy survey indicate a low value for the bias parameter b {approx} 1, requiring that Q {approx_lt} 0.6.

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8 p.

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INIS; OSTI as DE95015166

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  • Rencontres de Moriond on QCD and high energy interactions, Les Arcs (France), 11-26 Mar 1995

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  • Other: DE95015166
  • Report No.: FNAL/C--95/120
  • Report No.: CONF-9503158--16
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 105691
  • Archival Resource Key: ark:/67531/metadc619163

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  • May 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Aug. 23, 2016, 2:58 p.m.

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Loveday, J. Constraining omega and bias from the Stromlo-APM survey, article, May 1, 1995; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc619163/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.