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The K-Band Hubble Diagram for X-Ray Selected Brightest Cluster Galaxies

Published online by Cambridge University Press:  25 May 2016

R.G. Mann  and
C.A. Collins
R.G. Mann
Affiliation:
Astrophysics Group, Imperial College
C.A. Collins
Affiliation:
Astrophysics Group, Liverpool John Moores University

Extract

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The Hubble (magnitude-redshift) diagram for brightest cluster galaxies (BCGs) is a classic cosmological tool, widely studied because of the remarkably small dispersion (∼ 0.3 mag) in the absolute optical magnitudes of low redshift BCGs (Postman and Lauer 1995). Extending the BCG Hubble diagram to higher redshifts would greatly enhance its role as a cosmological probe, but this has been frustrated by several technical problems:

  1. – the conventional means of cluster selection in the optical become increasingly compromised by projection effects at z > 0.1

  2. – at higher redshifts the interpretation of optical magnitudes becomes increasingly complicated by the effects of possible star formation.

Type
Part 6. Large Scale Structure
Information
Symposium - International Astronomical Union , Volume 179: New Horizons from Multi-Wavelength Sky Surveys , 1998 , pp. 339 - 341
Copyright
Copyright © Kluwer 1998 

References

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