منابع مشابه
The Luminosity Dependence of Quasar Clustering
We investigate the luminosity dependence of quasar clustering, inspired by numerical simulations of galaxy mergers that incorporate black hole growth. These simulations have motivated a new interpretation of the quasar luminosity function. In this picture, the bright end of the quasar luminosity function consists of quasars radiating nearly at their peak luminosities, while the faint end consis...
متن کاملLuminosity and redshift dependent quasar clustering
We present detailed clustering measurements for a flux limited sample of ∼ 14, 000 quasars extracted from the 2dF QSO Redshift Survey (2QZ) in the redshift range 0.8 < z < 2.1. After splitting the sample into three redshift bins and each of them into six luminosity intervals, we estimate the quasar projected auto and cross-correlation functions at a given redshift for separations 3 ∼ < r/hMpc ∼...
متن کاملMeasuring the Dark Energy with Quasar Clustering
We show, through Monte Carlo simulations, that the Alcock-Pazyński test, as applied to quasar clustering, is a powerful tool to probe the cosmological density and equation of state parameters, Ωm0, Ωx0 and w. By taking into account peculiar velocity corrections to the correlation function we obtain, for the Two-Degree Field QSO Redshift Survey (2QZ), the predicted 1σ and 2σ confidence contours....
متن کاملQuasar Clustering and the Lifetime of Quasars
Although the population of luminous quasars rises and falls over a period of ∼ 109 years, the typical lifetime of individual quasars is uncertain by several orders of magnitude. We show that quasar clustering measurements can substantially narrow the range of possible lifetimes with the assumption that luminous quasars reside in the most massive host halos. If quasars are long-lived, then they ...
متن کاملLuminosity Dependence of the Quasar Clustering from SDSS DR5
46990 objects, which were primarily identified as quasars in SDSS DR5 and have spectroscopic redshifts were used to study the luminosity dependence of the quasar clustering with the help of two different techniques. The obtained results reveal that brighter quasars are more clustered, but this dependence is weak, which is in agreement with the results by Porciani & Norberg [1] and theoretical p...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1987
ISSN: 0074-1809
DOI: 10.1017/s0074180900159960