Formation of Supermassive Black Holes

摘要

Three different proposed mechanisms for supermassive black hole (SMBH) formation have been presented. Firstly, it has been suggested that SMBHs form in galactic nuclei by coherent collapse. Secondly, it has been suggested that SMBHs form by stellar collapse and then grow in mass. A third scenario is that massive black holes have a primordial origin and then grow in mass by accretion. This latter scenario is consistent with some hybrid versions of inflationary cosmology. In this paper we discuss the above three scenarios for SMBH formation with emphasis on the third possibility.