Power Spectrum Analysis of the 2dF QSO Sample Revisited

Abstract

We revisit the power spectrum analysis of the complete sample of the two degree field (2dF) QSO redshift (2QZ) survey, as a complementary test of the work by Outram et al. (2003). A power spectrum consistent with that of the 2QZ group is obtained. Differently from their approach, fitting of the power spectrum is investigated incorporating the nonlinear effects, the geometric distortion and the light-cone effect. It is shown that the QSO power spectrum is consistent with the $\Lambda$ cold dark matter (CDM) model with the matter density parameter ${\Omega }_m=0.2\sim 0.5$. Our constraint on the density parameter is rather weaker than that of the 2QZ group. We also show that the constraint slightly depends on the equation of state parameter $w$ of the dark energy. The constraint on $w$ from the QSO power spectrum is demonstrated, though it is not very tight.

15 pages, 5 figures, accepted for publication in the Astrophysical Journal

References in corpus (4)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys
• The 2dF QSO Redshift Survey - XI. The QSO Power Spectrum
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Cited by in corpus (3)

• A Measurement of the Quadrupole Power Spectrum in the Clustering of the 2dF QSO Survey
• Large Scale Clustering of Sloan Digital Sky Survey Quasars: Impact of the Baryon Density and the Cosmological Constant
• Dark energy reflections in the redshift-space quadrupole