Astronomy Tea Talk

All massive galaxies likely have supermassive black holes at their centers, and the masses of the black holes are known to correlate with properties of their host galaxy.  A spectroscopic survey of 700 nearby galaxies revealed several disky galaxies with extremely high velocity dispersions (>375 km/s) and at the same time shockingly small sizes and low luminosities. And these systems all appear to have extremely big black hole masses. This shows that the black holes in these systems did not co-evolve with its host galaxy, which is in stark conflict with the popular co-evolution picture of black hole and host.