Bright End of the Galaxy Luminosity Function in Clusters

Details Bright End of the Galaxy Luminosity Function in Clusters Bright End of the Galaxy Luminosity Function in Clusters

Dec 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969natur.224.1093p&link_type=abstract

Nature, Volume 224, Issue 5224, pp. 1093 (1969).

Computer Science

15

Scientific paper

PEACH1 has presented an important new set of values of M1, the absolute magnitude of the first brightest member of a rich cluster of galaxies, derived from unpublished data of Sandage. The results show again the small spread found by Humason, Mayall and Sandage2, but Peach finds that the standard deviation of the new M1 values is smaller by a factor of 2.7 than the standard deviation computed from a statistical model3 based in part on the older data of ref. 2. Peach concludes that the statistical model is inadequate, that perhaps the magnitude of the brightest cluster member is fixed and given (within standard deviation 0.27 mag.) ``independent of cluster richness or the luminosity function governing the fainter members''1.

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