An over-massive black hole in the compact lenticular galaxy NGC 1277

A new survey recently reported in Nature found a supermassive black hole (mass~17 billions of solar masses) at the center of a relatively "light" galaxy. This wouldn't be a surprise if the mass of the black hole wasn't more than half the mass of the buldge of the hosting galaxy.

Figure 3: The correlation between black-hole mass and near-infrared bulge luminosity.
The black line shows the mass–luminosity relation for galaxies with a directly measured black-hole mass.
NGC 1277 is a significant positive outlier.
[taken from Nature]