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Evolutionary corrections to the redshift-volume measurement of the density parameter | Synapse

March 1, 1988

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Evolutionary corrections to the redshift-volume measurement of the density parameter

SBSafi R. BahcallInstitut Gustave Roussy STScott TremaineInstitute for Advanced Study

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We examine the effect of evolution on determinations of the density parameter from the distribution of galaxies in flux-redshift space. Our model separates galaxies into two classes, ellipticals and spirals, with different star formation histories, and includes a crude estimate of luminosity evolution due to accretion of satellite galaxies. We find that the recent determination of the density parameter OMEGA₀_ by Loh and Spillar is uncertain by at least DELTAOMEGA = +/-1.

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Bahcall et al. (Tue,) studied this question.

synapsesocial.com/papers/69e9ca114465cff86fa819f1 https://doi.org/https://doi.org/10.1086/185110

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