Constraining black hole-galaxy scaling relations from the large-scale clustering of Active Galactic Nuclei and implied mean radiative efficiency

Understand

A supermassive black hole has been found at the centre of nearly every galaxy observed with sufficient sensitivity.

• The masses of these black holes are observed to increase with either the total mass or the mean (random) velocity of the stars in their host galaxies.
• The origin of these correlations remains elusive.
• Observational systematics and biases severely limit our knowledge of the local demography of supermassive black holes thus preventing accurate model comparisons and progress in this field.