Constraints on the [Omega_Matter-Omega_Lambda]-plane from Elliptical Galaxy Counts ?

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dc.creatorDriver, Simon P.
dc.date2002-01-23
dc.date.accessioned2026-07-07T02:02:21Z
dc.date.available2026-07-07T02:02:21Z
dc.descriptionHere we present a pilot study into whether elliptical galaxy counts alone, can place a useful constraint on the Omega_M - Omega_Lambda-plane. The elliptical galaxy counts are drawn from three surveys: The Millennium Galaxy Catalogue (16 > B_KPNO > 20), the B-band Parallel Survey (20 > B_AB >24) and the Hubble Deep Fields (23 > B_AB > 28). The elliptical luminosity function used in the modeling was derived from a combination of the Millennium Galaxy Catalogue, the two-degree field galaxy redshift survey and the Sloan Digital Sky Survey (M_*=-19.90, phi_*=0.0019/Mpc^3 and alpha =-0.75 for H_o=75km/s/Mpc). We adopt a benchmark model and tweak the various input parameters by their uncertainties to determine the impact upon the counts. We find that IF the faint-end slope of the elliptical galaxy luminosity function is known to better than 0.1$, then over the magnitude range 16 < B < 23 the counts depend most critically upon the cosmology, and can be used to place a weak constraint on the [Omega_Matter-Omega_Lambda]-plane.
dc.descriptionContributed article for "A New Era in Cosmology", Eds T. Shanks & N. Metcalfe, (Publ: ASP)
dc.identifierhttps://arxiv.org/abs/astro-ph/0201396
dc.identifierhttp://arxiv.org/abs/astro-ph/0201396
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4052
dc.subjectAstrophysics
dc.titleConstraints on the [Omega_Matter-Omega_Lambda]-plane from Elliptical Galaxy Counts ?
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