The sigma - L correlation in Nearby Early-Type Galaxies

Bernardi, M

Publication date

September 2006

Abstract

Early-type galaxy velocity dispersions and luminosities are correlated. The correlation estimated in local samples (<100 Mpc) differs from that measured more recently in the SDSS. We show that this is also true for the ENEAR sample if galaxy luminosities are estimated using distances which have been corrected for peculiar motions. We then show that, because the estimate of the `true' distance is derived from a correlation with velocity dispersion, in this case the D_n-sigma relation, using it in the sigma-L relation leads to an artificially tight relation with a biased slope. Making no correction for peculiar velocities results in a sigma-L relation which is very similar to that of the SDSS, although with larger scatter. We also measure the...

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The sigma - L correlation in Nearby Early-Type Galaxies

Abstract

Extracted data

The sigma - L correlation in Nearby Early-Type Galaxies

Abstract

Extracted data

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