Abstract
view Abstract Citations (27) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Primeval QSOs Cavaliere, A. ; Szalay, A. S. Abstract The physical processes causing the formation of an increased number of QSOs at redshifts higher than 2 are discussed, along with the implications for the turn-on of active galactic nuclei (AGN) at the same time as QSOs. It is argued that optical and X-ray background data indicate that all but the brightest objects will decline in number at redshifts exceeding 2. Consideration is given to the possibility that accreting black holes are at the center of AGNs and formed within a few billion years of the turn-on of QSOs. A scenario is also explored wherein QSOs are remnant echoes of the epoch of galaxy formation and are thereby a suitable object with which to probe the parent population. Publication: The Astrophysical Journal Pub Date: December 1986 DOI: 10.1086/164798 Bibcode: 1986ApJ...311..589C Keywords: Astronomical Models; Galactic Evolution; Galactic Nuclei; Quasars; Active Galactic Nuclei; Density Distribution; Luminosity; Universe; Astrophysics; GALAXIES: FORMATION; GALAXIES: NUCLEI; QUASARS full text sources ADS |
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