Research on the Momentum Driven Feedback Mechanism

The observations have shown a tight correlation between the mass of supermassive black holes(M_BH) at galactic centers and the stellar velocity dispersion(σ),or bulge stellar mass(M_b).It is believed that such relationships are caused by the feedback from the nucleus activity,but in the microscopic physics view the AGN feedback process proceeding is not clear.Recently,Silk & Nusser(2010) suspect the validity of the AGN feedback process by investigating a number of galaxies with observationally determined black hole mass and the stellar velocity dispersion.In the paper,we revisit the study of Silk & Nusser(2010) by considering more details about the galaxy properties.We combine a sample of 29 galaxies.Adopting the observed data of those galaxies,we calculate and reconsider the process of AGN feedback to test the effectiveness of AGN feedback in the potential of those galaxies,their density profile and the potentials,and dark matter.We find that the momentum driven feedback can be effective in most galaxies.