A new family of distance indicator relations for elliptical galaxies

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Distance, Elliptical Galaxies, Astronomical Photometry, Brightness Distribution, Galactic Evolution, Luminosity, Metallicity, Velocity Distribution

Scientific paper

A new family of distance indicator relations for elliptical galaxies is described. Distance-dependent quantities are expressed as distance-independent combinations of the mean surface brightness and a color, or any other metallicity indicator. Preliminary results based on published data indicate that the typical relative distance errors to individual galaxies derived from new relations are about 25 percent, and the accuracy of about 15 percent may be achievable with more homogeneous data sets. This is comparable to the accuracy obtained from the Tully-Fisher and D(n)-sigma relations. The necessary data are derived from photometry only and thus can be obtained relatively quickly for large numbers of galaxies.

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