Mathematics – Logic
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sgyu.conf..205d&link_type=abstract
Studies of Galaxies in the Young Universe with New Generation Telescope, Proceedings of Japan-German Seminar, held in Sendai, Ja
Mathematics
Logic
1
Scientific paper
In this contribution, I will present a scenario for the evolution of the activity in galactic centers as a function of the cosmological evolution. The model is based on the observation that quasar activity seems to set in well before z = 5, and thus seems to require the formation of super-massive black holes on an extremely short time scale. There are mainly two alternative ways how this may have come about. Either such super-massive black holes were already created so massive, or the accretion process in these galaxies was much more efficient in early phases of these galaxies evolution compared to other ones. I will adopt the hypothesis that super-massive black holes are the results of galaxy-galaxy interactions or mergers in the early Universe. While the merger process may succeed to concentrate large amounts of gaseous mass (up to 1010 M&sun;) within a few 102 pc, the action of a self-gravitating accretion disk can then do the rest and feed a sizeable fraction of this matter into the central black hole within a time scale very short compared to the Hubble time.
Duschl Wolfgang J.
Strittmatter Peter A.
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