Large scale correlations in galaxy clustering from the Two degree Field Galaxy Redshift Survey

Abstract

We study galaxy correlations from samples extracted from the 2dFGRS final release. Statistical properties are characterized by studying the nearest neighbor probability density, the conditional density and the reduced two-point correlation function. The result is that the conditional density has a power-law behavior in redshift space described by an exponent γ=0.8 \pm 0.2 in the interval from about 1 Mpc/h, the average distance between nearest galaxies, up to about 40 Mpc/h, corresponding to radius of the largest sphere contained in the samples. These results are consistent with other studies of the conditional density and are useful to clarify the subtle role of finite-size effects on the determination of the two-point correlation function in redshift and real space

11 pages, 14 figures. Accepted for publication in Astronomy and Astrophysics

References in corpus (16)

• The Sloan Digital Sky Survey: Technical Summary
• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
• The 2dF Galaxy Redshift Survey: The dependence of galaxy clustering on luminosity and spectral type
• The 2dF Galaxy Redshift Survey: Luminosity dependence of galaxy clustering
• The 2dF Galaxy Redshift Survey: Galaxy luminosity functions per spectral type
• The Void Phenomenon
• On Departures From a Power Law in the Galaxy Correlation Function
• Cosmic homogeneity demonstrated with luminous red galaxies
• Scale-invariance of galaxy clustering
• A comparison of estimators for the two-point correlation function
• The 2dF Galaxy Redshift Survey: galaxy clustering per spectral type
• Basic properties of galaxy clustering in the light of recent results from the Sloan Digital Sky Survey
• Fractal correlations in the CfA2-South redshift survey
• The Galaxy Distribution Function from the 2MASS Survey
• Galaxy Bias in Quintessence Cosmological Models
• Angular correlations of galaxy distribution

Cited by in corpus (13)

• Absence of self-averaging and of homogeneity in the large scale galaxy distribution
• Inhomogeneities in the universe
• Large scale structure in the HI Parkes All-Sky Survey: Filling the Voids with HI galaxies?
• Fractal Dimensions of a Weakly Clustered Distribution and the Scale of Homogeneity
• Breaking the self-averaging properties of spatial galaxy fluctuations in the Sloan Digital Sky Survey - Data Release Six
• Power law correlations in galaxy distribution and finite volume effects from the Sloan Digital Sky Survey Data Release Four
• Large-scale fluctuations in the distribution of galaxies from the Two Degree Field Galaxy Redshift Survey
• Persistent fluctuations in the distribution of galaxies from the Two degree Field Galaxy Redshift Survey
• Extension and estimation of correlations in Cold Dark Matter models
• Testing the Copernican and Cosmological Principles in the local universe with galaxy surveys
• Fractal Holography: a geometric re-interpretation of cosmological large scale structure
• Statistical physics for cosmic structures
• The Neighborhood Function and Its Application to Identifying Large-Scale Structure in the Comoving Universe Frame