Maximum cosmic redshift of quasars at Z greater than 3

Details Maximum cosmic redshift of quasars at Z greater than 3 Maximum cosmic redshift of quasars at Z greater than 3

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.213..389s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 213, March 15, 1985, p. 389-398.

Astronomy and Astrophysics

Astronomy

1

Cosmology, Galactic Evolution, Quasars, Red Shift, Accretion Disks, Black Holes (Astronomy), Luminosity, Relativity, Space Density, Stellar Winds

Scientific paper

Timing arguments and current theories of galaxy evolution are used to calculate the maximum cosmological redshift Zmax below which quasars first formed in the nuclei of galaxies. On the assumption that the mass density of the universe is dominated by massive neutrinos ≡10 eV of density Ων ≡ 1 (Einstein-de Sitter cosmology), it is found that galaxies first formed at redshift Zf ≡ 10, whereas luminous (≡1048erg s-1) quasars formed first in cD galaxies at Z ⪉ Zmax ≡ 5. For a dust-free universe, the space density of high-redshift quasars would show a real decrease at redshifts Z > 4.7.

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