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5.6.3 Cosmological Dimming

The surface brightnesses were corrected for cosmological dimming by subtracting $10 \log (1 + {z_{\rm CMB}})$, where $z_{\rm CMB}$ is the cluster CMB redshift. HydraI has ${cz_{\rm CMB}}= 4050$ km/s (Zabludoff et al. 1990).


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Properties of E and S0 Galaxies in the Clusters HydraI and Coma
Master's Thesis, University of Copenhagen, July 1997

Bo Milvang-Jensen (milvang@astro.ku.dk)