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The correlation of line strength with luminosity and redshift from composite QSO spectra

ArXiv astro-ph/0207571 (2002)

Authors:

SM Croom, K Rhook, EA Corbett, BJ Boyle, H Netzer, NS Loaring, L Miller, PJ Outram, T Shanks, RJ Smith

Abstract:

We have generated a series of composite QSO spectra using over 22000 individual low resolution (~8A) QSO spectra obtained from the 2dF (18.25
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Forming stars on an exponential timescale: the key to exponential stellar profiles in disc galaxies?

Monthly Notices of the Royal Astronomical Society 333 (2002) 894-910

Authors:

AD Slyz, Julien Devriendt, Joseph Silk, Andreas Burkert
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Erratum: “Discovery of Radio-Loud Broad Absorption Line Quasars Using Ultraviolet Excess and Deep Radio Selection” (ApJ, 505, L7 [1998])

The Astrophysical Journal American Astronomical Society 571:2 (2002) l191-l191

Authors:

MS Brotherton, W van Breugel, RJ Smith, BJ Boyle, T Shanks, SM Croom, L Miller, RH Becker
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Clustering in the 2dF QSO Redshift Survey

ArXiv astro-ph/0205039 (2002)

Authors:

SM Croom, BJ Boyle, NS Loaring, L Miller, P Outram, T Shanks, RJ Smith, F Hoyle

Abstract:

We present clustering results from the 2dF QSO Redshift Survey (2QZ) which currently contains over 20,000 QSOs at z<3. The two-point correlation function of QSOs averaged over the entire survey (~1.5) is found to be similar to that of local galaxies. When sub-dividing the sample as a function of redshift, we find that for an Einstein-de Sitter universe QSO clustering is constant (in comoving coordinates) over the entire redshift range probed by the 2QZ, while in a universe with Omega_0=0.3 and Lambda_0=0.7 there is a marginal increase in clustering with redshift. Sub-dividing the 2QZ on the basis of apparent magnitude we find only a slight difference between the clustering of QSOs of different apparent brightness, with the brightest QSOs having marginally stronger clustering. We have made a first measurement of the redshift space distortion of QSO clustering, with the goal of determining the value of cosmological parameters (in partcular Lambda_0) from geometric distortions. The current data do not allow us to discriminate between models, however, in combination with constraints from the evolution of mass clustering we find Omega_0=1-Lambda_0=0.23 +0.44-0.13 and beta(z~1.4)=0.39 +0.18-0.17. The full 2QZ data set will provide further cosmological constraints.
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The 2dF QSO Redshift Survey - IX. A measurement of the luminosity dependence of QSO clustering

ArXiv astro-ph/0205036 (2002)

Authors:

Scott M Croom, BJ Boyle, NS Loaring, L Miller, PJ Outram, T Shanks, RJ Smith

Abstract:

In this Paper we present a clustering analysis of QSOs as a function of luminosity over the redshift range z=0.3-2.9. We use a sample of 10566 QSOs taken from the preliminary data release catalogue of the 2dF QSO Redshift Survey (2QZ). We analyse QSO clustering as a function of apparent magnitude. The strong luminosity evolution of QSOs means that this is approximately equivalent to analysing the data as a function of absolute magnitude relative to M* over the redshift range that the 2QZ probes. Over the relatively narrow range in apparent magnitude of the 2QZ we find no significant (>2sigma) variation in the strength of clustering, however, there is marginal evidence for QSOs with brighter apparent magnitudes having a stronger clustering amplitude. QSOs with 18.25
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