Near-Infrared Observations of Distant Cluster Ellipticals

  • S. E. Persson
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 141)


Visual-to-infrared colors of 56 red-selected, first ranked, cluster ellipticals out to a redshift of 0.92 are discussed. Color versus redshift diagrams display substantial scatter at all redshifts blueward from a well-defined ridge line that is a good match to the energy distribution of an old gE galaxy. Beyond z = 0.6 there are few red galaxies. Selection effects that operate even in this sample are evaluated via simple combinations of star bursts plus an old galaxy. The “first-ranked” object is not necessarily relevant for a determination of q o in the Hubble diagram. An age test based on the reddest galaxies at high redshift looks promising.


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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • S. E. Persson
    • 1
  1. 1.Mount Wilson and Las Campanas ObservatoriesPasadenaUSA

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