The formation of nuclei in newly formed galaxies and the evolution of the quasar population

Details The formation of nuclei in newly formed galaxies and the evolution of the quasar population The formation of nuclei in newly formed galaxies and the evolution of the quasar population

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.263..168h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 263, no. 1, p. 168-178.

Astronomy and Astrophysics

Astronomy

338

Active Galactic Nuclei, Black Holes (Astronomy), Galactic Evolution, Quasars, Red Shift, Astronomical Models, Dark Matter, Galactic Structure, Halos, Stellar Luminosity

Scientific paper

A model to explain the evolution of the quasar luminosity function is presented. At intermediate and high redshifts, the formation of 'new' black holes at each step in the hierarchical growth of structure is invoked as the driving force of the strong evolution of the quasar population. Quasars are assumed to be short-lived, constituting the first phase of the formation of a galaxy in the potential well of a dark matter halo. The timelag between halo virialization and the birth of the quasar is expected to be short compared to the cosmological time-scale, even at high redshifts. Simple assumptions are made to relate the luminosity of a quasar to the mass of its central black hole and to the mass of its corresponding host object. The Press-Schechter formalism is used within the CDM scenario (q(0) = 0.5, h(100) = 0.5) to estimate the number of newly forming dark matter haloes at successive cosmic epochs. A rapid rise in the number density of newly forming massive black holes is followed by a steep fall; this can explain the observed dependence of the quasar population on redshift. Model luminosity functions are calculated and found to be in good agreement with the observational data.

Affiliated with

Also associated with

No associations

Rating

The formation of nuclei in newly formed galaxies and the evolution of the quasar population does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The formation of nuclei in newly formed galaxies and the evolution of the quasar population, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The formation of nuclei in newly formed galaxies and the evolution of the quasar population will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1073261