Masses of black holes in nearby galactic nuclei are closely related to the velocity dispersion of the host galaxy bulge. QSO emission-line widths indicate a similar relationship in the early universe.
CITATION STYLE
Shields, G. A., Gebhardt, K., Salviander, S., Wills, B. J., Xie, B., Brotherton, M. S., … Dietrich, M. (2003). The Black Hole–Bulge Relationship in Quasars. The Astrophysical Journal, 583(1), 124–133. https://doi.org/10.1086/345348
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