Formation of supermassive black holes which nurture galaxies

Observational evidences imply that the supermassive black holes(SMBH) seem to define the center of the galaxies. We explore the scenario that I) SMBH is formed first and then II) it triggers the star formation leading to the variety of galaxies. We propose that SMBH are formed at an early stage from the collapse of the Bose-Einstein condensed dark matter. Using Axion model, we calculate the mass ratio of the SMBH and the dark halo, which is of order 10−4. Further, such SMBH may form jet/outflow which compress the surrounding gas and yield variety of galaxy species. We further find that more massive SMBH completes the galaxy formation faster - an example of downsizing.