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Infrared Observations of Giant Elliptical Galaxies: (V-K) Colors and the Infrared Hubble Diagram

Published online by Cambridge University Press:  14 August 2015

Gary L. Grasdalen*
Affiliation:
Kitt Peak National Observatory and Department of Physics and Astronomy, University of Wyoming

Abstract

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The (V-K) colors of giant elliptical galaxies as a function of redshift are discussed. Present data are consistent with mild color evolution at z ~ 0.45. An infrared Hubble (redshift-magnitude) diagram is given. Cosmological models with qo = 0 and no luminosity evolution are clearly excluded by the present data. A wide variety of models including those with qo = 0 are permissible if luminosity evolution is included. Instrumental and programmatic implications of these results are summarized.

Type
Research Article
Copyright
Copyright © Reidel 1980 

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