Quasars and galaxy formation. I - The Z greater than 4 objects

Details Quasars and galaxy formation. I - The Z greater than 4 objects Quasars and galaxy formation. I - The Z greater than 4 objects

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101....5t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, Jan. 1991, p. 5-17.

Statistics

Computation

136

Computational Astrophysics, Cosmology, Galactic Evolution, Quasars, Accretion Disks, Black Holes (Astronomy), Luminosity, Red Shift

Scientific paper

The physical properties of the known quasars with z greater than 4 are examined with particular reference to theories of cosmic structure formation. A 'standard' massive accreting black hole model for quasars is used to calculate the masses, radiative efficiencies, and accretion rates of the observed objects. The masses, densities, cosmological overdensities, and sizes of the accretion fuel reservoirs associated with the quasar black holes are considered, and several indirect arguments are used to connect these quantities to the masses and overdensities of the quasar host objects. Finally, constraints on the epoch of formation of the host objects are discussed. The general conclusion is that the observed quasars with z greater than 4 suggest that the cosmic structure formation was already well advanced at z = 5, when the universe was a small fraction of its present age.

Affiliated with

Also associated with

No associations

Rating

Quasars and galaxy formation. I - The Z greater than 4 objects 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 Quasars and galaxy formation. I - The Z greater than 4 objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quasars and galaxy formation. I - The Z greater than 4 objects will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1894738