Effect of Distance Errors: Applications to SDSS Early-Type Galaxies

Details Effect of Distance Errors: Applications to SDSS Early-Type Galaxies Effect of Distance Errors: Applications to SDSS Early-Type Galaxies

2008-04-04

arxiv.org/abs/0804.0818v1

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.

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