The Red Envelope and the Age of the Universe

  • Robert W. O’Connell
Part of the Astrophysics and Space Science Library book series (ASSL, volume 141)


The photometric evolution of old stellar populations is slow in the optical/IR. Consequently, observational error is a strongly limiting factor in the accuracy possible for determining galaxy ages or estimating q 0 at high redshifts from indices such as the 4000 Å Break. Existing observations of the red envelope at z ≳ 0.3 are consistent with a wide range of evolutionary histories. The middle-UV spectral region, λrest = 2000–3300 Å, appears to promise less ambiguous results.


Star Formation High Redshift Stellar Population Elliptical Galaxy Metal Abundance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • Robert W. O’Connell
    • 1
  1. 1.Astronomy DepartmentUniversity of VirginiaCharlottesvilleUSA

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