Luminous Cluster Ellipticals as Cosmological Standard Rods?

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dc.creatorBender, R.
dc.creatorSaglia, R. P.
dc.creatorZiegler, B.
dc.creatorGreggio, L.
dc.creatorHopp, U.
dc.date1997-11-24
dc.date.accessioned2026-07-07T02:25:14Z
dc.date.available2026-07-07T02:25:14Z
dc.descriptionWe explore the possibility to calibrate massive cluster ellipticals as cosmological standard rods. The method is based on the Fundamental Plane relation combined with a correction for luminosity evolution which is derived from the Mg$-σ$ relation. Principle caveats and sources of major errors are briefly discussed. We apply the described procedure to nine elliptical galaxies in two clusters at $z=0.375$ and derive constraints on the cosmological model. For the best fitting $Λ$-free cosmological model we obtain: $q_o \approx 0.1$, with 90% confidence limits being $0 < q_o < 0.7$ (the lower limit being due to the presence of matter in the Universe). If the inflationary scenario applies (i.e., space has flat geometry), then, for the best fitting model, matter and $Λ$ contribute about equally to the critical cosmic density (i.e. $Ω_m \approx Ω_Λ\approx 0.5$). With 90% confidence $Ω_Λ$ should be smaller than 0.9.
dc.description6 pages, including 2 eps-figures, Latex, uses sprocl.sty, to appear in Proceedings of the 12th Potsdam Cosmology Workshop, "Large Scale Structure: Tracks and Traces", Edt.: V. Müller, World Scientific
dc.identifierhttps://arxiv.org/abs/astro-ph/9711278
dc.identifierhttp://arxiv.org/abs/astro-ph/9711278
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/11847
dc.subjectAstrophysics
dc.titleLuminous Cluster Ellipticals as Cosmological Standard Rods?
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