Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.276.1255v&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 276, Issue 4, pp. 1255-1261.
Astronomy and Astrophysics
Astronomy
24
Galaxies: Distances And Redshifts, Galaxies: Elliptical And Lenticular, Cd, Galaxies: Fundamental Parameters, Galaxies: Photometry, Distance Scale
Scientific paper
We argue that the physical reason for the success of the Fundamental Plane and the D_n-sigma relation as distance estimators for elliptical galaxies is the existence of a relation between luminosity and mass with small intrinsic scatter. Therefore a better understanding of the luminosity and mass variables, and of the mass-luminosity relation, is needed to improve distance estimation for elliptical galaxies. We propose a distance indicator in the form of a mass-luminosity relation and use it to derive modifications to the Fundamental Plane and to the D_n-sigma relation. Note that distances estimated with these modified Fundamental Plane and D_n-sigma relations may, in practice, turn out to be less precise than those estimated with the standard relations when the added terms have large observational errors.
Bertin Giuseppe
Stiavelli Massimo
van Albada Tjeerd S.
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