• Might the M-sigma relation extend to galaxy clusters and higher?

    From stargene@21:1/5 to All on Sun May 9 08:53:36 2021
    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.

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