The power spectrum of galaxies in the 2dF 100k redshift survey

By Max Tegmark, A. Hamilton, Yongzhong Xu. Monthly notices of the Royal Astronomical Society, 2001

144 citations recorded by the source corpus.

We compute the real-space power spectrum and the redshift-space distortions of galaxies in the 2dF 100k galaxy redshift survey using pseudo-Karhunen-Loeve eigenmodes and the stochastic bias formalism. Our results agree well with those published by the 2dFGRS team, and have the added advantage of producing easy-to-interpret uncorrelated minimum-variance measurements of the galaxy-galaxy, galaxy-velocity and velocity-velocity power spectra in 27 k-bands, with narrow and well-behaved window functions in the range 0.01 h Mpc −1 0.4 and the redshift-distortion parameter β = 0.49 ± 0.16 for r = 1( β = 0.47 ± 0.16 without finger-of-god compression). Since this is an apparent-magnitude limited sample, luminosity-dependent bias may cause a slight red-tilt in the power spectrum. A battery of systematic error tests indicate that the sur- vey is not only impressive in size, but also unusually clean, free of systematic errors at the level to which our tests are sensitive. Our measurements and window functions are available at http://www.hep.upenn.edu/∼max/2df.html together with the survey mask, radial selection function and uniform subsample of the survey that we have constructed.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/b055e352119722b0b1acd53896b68e5980549f64

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Citations in the corpus

The impact of non‐Gaussian errors on weak lensing surveys (2008, methodology): “Using this approach, a more sophisticated decorrelating scheme of the band powers may be developed extending the method for the galaxy power spectrum measurement (e.g., Tegmark et al. 2002) to the lensing case.”
The 2dF Galaxy Redshift Survey: power-spectrum analysis of the final data set and cosmological implications (2005, methodology): “16c we plot the power spectrum measured by Tegmark et al. (2002) from the 2dFGRS 100k data release.”
Myths and truths concerning estimation of power spectra: the case for a hybrid estimator (2003, methodology): “QML estimators have been used extensively by Tegmark and collaborators (e.g. Tegmark et al. 1998; Hamilton, Tegmark and Padmanabhan, 2000; Tegmark et al. 2002a; Tegmark, Hamilton and Xu, 2002b).”
The Three-Dimensional Power Spectrum of Galaxies from the Sloan Digital Sky Survey (2003, background): “…et al. 2002) have supported a flat darkenergy dominated cosmology, as have angular clustering analyses of the parent catalogs underlying the 2dFGRS (Efstathiou & Moody 2001) and SDSS (Scranton et al. 2002; Connolly et al. 2002; Tegmark et al. 2002; Szalay et al. 2003; Dodelson et al. 2002).”
Redshift-space distortions, pairwise velocities and nonlinearities (2004, background): “(16), by integrating the redshift-space correlation function along the line of sight [56–58], the other is to try to measure the power for modes perpendicular to the line of sight either by smoothly approaching μ = 0 [59] or at large scales by using the Kaiser formula to go from multipoles to the re”
New York University Value-Added Galaxy Catalog: A Galaxy Catalog Based on New Public Surveys (2004, methodology): “Spherical polygons have several advantages: they are easy to express, it is easy to determine whether a point is inside or outside, and there exist relatively simple methods to transform them into spherical harmonic components (Tegmark et al. 2002).”
Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies (2005, unknown): “Percival et al. (2001) favored baryons at 2 σ in a power spectrum analysis of data from the 2dF Galaxy Redshift Survey (hereafter 2dFGRS; Colless et al. 2001), but Tegmark et al. (2002) did not recover the signal with 65% of the same data.”