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I have a question which I can't resolve online and
perhaps you might answer if you have the time. I'm familiar with the M-sigma relation for supermassive black holes and the motions of stars in elliptical galaxies and spiral bulges. Which goes roughly like: Mbh varies with (more or less) the fourth power of velocity of stars. It occurs to me to ask: Does something roughly similar exist for superclusters of galaxies, where clusters and individual galaxies are proxies for stars in the relation's original loci? I ask because of the prominence of super- massive BHs in clusters and superclusters. Not to mention dark matter. Thanks, Gene |
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