Abstract:
Supermassive black hole binaries (SMBHBs) are expected by the hierarchical galaxy formation model in ΛCDM cosmology. A binary may become stalling at the parsec scale and is expected to be detected in nearby normal gas-poor galaxies, which have not yet confirmed by observations because we do not have efficient methods to detect them. In this talk, I will introduce a possible method to detect a SMBHB in normal galaxies. As in the hierarchical galaxy formation model, today's galaxies are the product of frequent galaxy merging, triggering the activity of active galactic nuclei in gas-rich mergers. During the talk, we will also investigate the interaction of SMBBHs and an accretion disc and show that the stalling can be avoided due to the interaction and a rapid coalescence of SMMBHs can be reached, which would give rise to the rich observational signatures.
Coffee and tea will be served 20 minutes prior to the seminar.