Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-05-29
Mon.Not.Roy.Astron.Soc. 334 (2002) 958
Astronomy and Astrophysics
Astrophysics
16 pages, 6 figures, MNRAS, in press
Scientific paper
10.1046/j.1365-8711.2002.05575.x
In this paper we obtain constraints on the cosmological density parameters, \Omega_m and \Omega_b, by comparing the preliminary measurement of the QSO power spectrum from the two degree field QSO redshift survey with results from an analytic technique of power spectrum estimation, described in this paper. We demonstrate the validity of the analytic approach by comparing the results with the power spectrum of an N-body simulation. We find a better fit to the shape of the QSO power spectrum for low density models with \Omega_m= 0.1-0.4. We show that a finite baryon fraction \Omega_b/\Omega_m=0.2, consistent with observations of the CMB anisotropies and nucleosynthesis, fits the observational result of the 2QZ survey better, though the constraint is not very tight. By using the Fisher matrix technique, we investigate just how a survey would be required before a significant constraint on the density parameters can be made. We demonstrate that the constraint could be significantly improved if the survey was four times larger.
No associations
LandOfFree
Cosmological Constraint from the 2dF QSO Spatial Power Spectrum does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmological Constraint from the 2dF QSO Spatial Power Spectrum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological Constraint from the 2dF QSO Spatial Power Spectrum will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-168905