How do the most massive BHs grow
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The BH masses of brightest cluster galaxies exhibit a steeper M BH a?? sigmarelation than their lower mass counterparts. Are these BHs different because ofthe deep gravitational potential and the rich environment they live in? How dothe most massive BHs grow? The definite test to answer these questions is tomeasure BH masses, galaxy properties, and halo properties of massive cluster andisolated ellipticals, and confront these results with cosmological simulations.However, we lack the sufficient halo mass measurements for massive isolatedellipticals. We request Chandra and XMMNewton observations of two massiveisolated galaxies, NGC890 and NGC7052, with available BH mass measurements tocharacterize their dark matter halo properties. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]
