Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-01-20
Mon.Not.Roy.Astron.Soc.352:828,2004
Astronomy and Astrophysics
Astrophysics
10 pages, 6 figures. Dark matter comparison added. Accepted MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07968.x
We measure the redshift space reduced void probability function (VPF) for 2dFGRS volume limited galaxy samples covering the absolute magnitude range M_bJ-5logh=-18 to -22. Theoretically, the VPF connects the distribution of voids to the moments of galaxy clustering of all orders, and can be used to discriminate clustering models in the weakly non-linear regime. The reduced VPF measured from the 2dFGRS is in excellent agreement with the paradigm of hierarchical scaling of the galaxy clustering moments. The accuracy of our measurement is such that we can rule out, at a very high significance, popular models for galaxy clustering, including the lognormal distribution. We demonstrate that the negative binomial model gives a very good approximation to the 2dFGRS data over a wide range of scales, out to at least 20h-1Mpc. Conversely, the reduced VPF for dark matter in a LambdaCDM universe does appear to be lognormal on small scales but deviates significantly beyond \approx 4h-1Mpc. We find little dependence of the 2dFGRS reduced VPF on galaxy luminosity. Our results hold independently in both the north and south Galactic pole survey regions.
Baldry Ivan K.
Baugh Carlton M.
Bland-Hawthorn Jonathan
Bridges Terry
Cannon Robert
No associations
LandOfFree
The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models 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 The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-641246