Ultramassive black holes in the most massive galaxies: $M_{\mathrm{BH}}-\sigma$ versus $M_{\mathrm{BH}}-R_{\mathrm{b}}$

Bililign T. Dullo, Armando Gil de Paz, Johan H. Knapen

[Abridged] We investigate the nature of the relations between black hole (BH) mass ($M_{\mathrm{BH}}$) and the central velocity dispersion ($\sigma$) and, for core-Sérsic galaxies, the size…