Correlation Lengths of Red and Blue Galaxies: A New Cosmic Ruler

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dc.creatorLongo, Michael J.
dc.date2008-10-22
dc.date.accessioned2026-07-07T10:12:27Z
dc.date.available2026-07-07T10:12:27Z
dc.descriptionA comparison of the correlation lengths of red galaxies with blue can provide a new cosmic ruler. Using 269,000 galaxies from the SDSS DR6 survey, I show that the 3D correlation length averaged over many clusters remains very nearly constant at Lo=4.797+/-0.024 Mpc/h from small redshifts out to redshifts of 0.5. This serves as a new measure of cosmic length scales as well as a means of testing the standard cosmological model that is almost free of selection biases. The cluster number density also appears to remain constant over this redshift range.
dc.description12 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0810.4066
dc.identifierhttp://arxiv.org/abs/0810.4066
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172190
dc.subjectAstrophysics
dc.titleCorrelation Lengths of Red and Blue Galaxies: A New Cosmic Ruler
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