Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-04-04
Astronomy and Astrophysics
Astrophysics
5 pages, 2 figures, to appear in the proceedings of the XLIIIst Rencontres de Moriond, Cosmology, La Thuile, Italy, 15-22 Marc
Scientific paper
Noisy distance estimates associated with photometric rather than spectroscopic redshifts lead to a mis-estimate of the luminosities, and produce a correlated mis-estimate of the sizes. We consider a sample of early-type galaxies from the SDSS DR6 and apply the generalization of the V_max method to correct for these biases. We show that our technique recovers the true redshift, magnitude and size distributions, as well as the true size-luminosity relation. Regardless the specific application outlined here, our method impacts a broader range of studies, when at least one distance-dependent quantity is involved.
Rossi Graziano
Sheth Ravi K.
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