Spectral variations in brightest cluster galaxies

Details Spectral variations in brightest cluster galaxies Spectral variations in brightest cluster galaxies

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..376w&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Mar. 1, 1978, p. 376-389.

Astronomy and Astrophysics

Astrophysics

24

Cosmology, Galactic Clusters, Spectral Energy Distribution, Metallic Stars, Populations, Red Shift, Stellar Spectrophotometry

Scientific paper

Multichannel-spectrometer scans of 56 of the brightest galaxies in faint clusters have been examined for evidence of color evolution. The dispersion introduced into the sample by some 25% of the galaxies which have unusual spectra is shown to be sufficient to obscure evolutionary variations. On omitting these galaxies it is found that over a time equivalent to a redshift of 0.46, B-V decreases by no more than 0.04 mag. A comparative analysis of the spectral energy distributions suggests that their differences may be due to a combination of the dispersion in metallicity among the members of the sample and to anomalous reddening of individual galaxies.

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