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We show the apparent redshift-space clustering of galaxies in redshift range of 0.2--0.4 provides surprisingly useful constraints on dark energy component in the universe, because of the right balance between the density of objects and the…

Astrophysics · Physics 2009-11-07 Takahiko Matsubara , Alexander S. Szalay

By studying the bispectrum of the galaxy distribution in the 2dF galaxy redhsift survey (2dFGRS), we have shown that 2dFGRS galaxies are unbiased tracers of the mass distribution. This allows us the break the degeneracy intrinsic to power…

Astrophysics · Physics 2007-05-23 Licia Verde , Alan F. Heavens , Will J. Percival , Sabino Matarrese

We measure the clustering of DES Year 1 galaxies that are intended to be combined with weak lensing samples in order to produce precise cosmological constraints from the joint analysis of large-scale structure and lensing correlations.…

Cosmology and Nongalactic Astrophysics · Physics 2018-09-12 J. Elvin-Poole , M. Crocce , A. J. Ross , T. Giannantonio , E. Rozo , E. S. Rykoff , S. Avila , N. Banik , J. Blazek , S. L. Bridle , R. Cawthon , A. Drlica-Wagner , O. Friedrich , N. Kokron , E. Krause , N. MacCrann , J. Prat , C. Sanchez , L. F. Secco , I. Sevilla-Noarbe , M. A. Troxel , T. M. C. Abbott , F. B. Abdalla , S. Allam , J. Annis , J. Asorey , K. Bechtol , M. R. Becker , A. Benoit-Levy , G. M. Bernstein , E. Bertin , D. Brooks , E. Buckley-Geer , D. L. Burke , A. Carnero Rosell , D. Carollo , M. Carrasco Kind , J. Carretero , F. J. Castander , C. E. Cunha , C. B. DAndrea , L. N. da Costa , T. M. Davis , C. Davis , S. Desai , H. T. Diehl , J. P. Dietrich , S. Dodelson , P. Doel , T. F. Eifler , A. E. Evrard , E. Fernandez , B. Flaugher , P. Fosalba , J. Frieman , J. Garcia-Bellido , E. Gaztanaga , D. W. Gerdes , K. Glazebrook , D. Gruen , R. A. Gruendl , J. Gschwend , G. Gutierrez , W. G. Hartley , S. R. Hinton , K. Honscheid , J. K. Hoormann , B. Jain , D. J. James , M. Jarvis , T. Jeltema , M. W. G. Johnson , M. D. Johnson , A. King , K. Kuehn , S. Kuhlmann , N. Kuropatkin , O. Lahav , G. Lewis , T. S. Li , C. Lidman , M. Lima , H. Lin , E. Macaulay , M. March , J. L. Marshall , P. Martini , P. Melchior , F. Menanteau , R. Miquel , J. J. Mohr , A. Moller , R. C. Nichol , B. Nord , C. R. ONeill , W. J. Percival , D. Petravick , A. A. Plazas , A. K. Romer , M. Sako , E. Sanchez , V. Scarpine , R. Schindler , M. Schubnell , E. Sheldon , M. Smith , R. C. Smith , M. Soares-Santos , F. Sobreira , N. E. Sommer , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , B. E. Tucker , D. L. Tucker , S. A. Uddin , V. Vikram , A. R. Walker , R. H. Wechsler , J. Weller , W. Wester , R. C. Wolf , F. Yuan , B. Zhang , J. Zuntz

We develop new methods to study the properties of galaxy redshift surveys and radial peculiar velocity surveys, both individually and combined. We derive the Fisher information matrix for redshift surveys, including redshift distortions and…

Astrophysics · Physics 2009-11-10 Daniel Burkey , Andy Taylor

A Fourier analysis on galaxy number counts from redshift data of both the Sloan Digital Sky Survey and the 2dF Galaxy Redshift Survey indicates that galaxies have preferred periodic redshift spacings of $\Delta z =$ 0.0102, 0.0246, and…

Astrophysics · Physics 2008-09-11 John G. Hartnett , Koichi Hirano

We reconstruct the underlying density field of the 2 degree Field Galaxy Redshift Survey (2dFGRS) for the redshift range 0.035<z<0.200 using the Wiener Filtering method. The Wiener Filter suppresses shot noise and accounts for selection and…

We present a spectroscopic survey of almost 15,000 candidate intermediate-redshift Luminous Red Galaxies (LRGs) brighter than i=19.8, observed with 2dF on the Anglo-Australian Telescope. The targets were selected photometrically from the…

We study statistical properties of galaxy structures in several samples extracted from the 2dF Galaxy Redshift Survey. In particular, we measured conditional fluctuations by means of the scale-length method and determined their probability…

Cosmology and Nongalactic Astrophysics · Physics 2010-11-02 Francesco Sylos Labini , Nikolay L. Vasilyev , Yurij V. Baryshev

We present measurements of the higher-order clustering of red and blue galaxies as a function of scale and luminosity made from the two-degree field galaxy redshift survey (2dFGRS). We use a counts-in-cells analysis to estimate the volume…

Astrophysics · Physics 2008-11-26 Darren J. Croton , Peder Norberg , Enrique Gaztanaga , Carlton M. Baugh

We present an analysis of the small-to-intermediate scale clustering of samples of Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey and the 2dF-SDSS LRG and QSO (2SLAQ) survey carefully matched to have the same rest-frame…

Three galaxy redshifts surveys and their analyses are discussed. (i) The recently completed Optical Redshift Survey (ORS) includes galaxies larger than 1.9 arcmin and/or brighter than $14.5^m$. It provides redshifts for $\sim 8300 $…

Astrophysics · Physics 2007-05-23 Ofer Lahav

I review progress in the past few years in studying the large-scale structure of the universe through redshift surveys of galaxies. Of the many statistical methods used to describe the galaxy distribution, I concentrate here on the power…

Astrophysics · Physics 2007-05-23 Michael A. Strauss

Several statistics are applied to groups and galaxies in groups in the Two degree Field Galaxy Redshift Survey. Firstly we estimate the luminosity functions for different subsets of galaxies in groups. The results are well fitted by a…

Astrophysics · Physics 2009-11-07 H. J. Martinez , A. Zandivarez , M. E. Merchan , M. J. L. Dominguez

(abridged) We present a study of the nature and evolution of large-scale structure based on two independent redshift surveys of faint field galaxies conducted with the 176-fiber Norris Spectrograph on the Palomar 200-inch telescope. The two…

Astrophysics · Physics 2009-10-31 Todd Small , Chung-Pei Ma , Wallace Sargent , Donald Hamilton

Measurements of the growth rate of structure, $f\sigma_8$ in the low-redshift Universe allow stringent tests of the cosmological model. In this work, we provide new constraints on $f\sigma_{8}$ at an effective redshift of $z=0.03$ using the…

Cosmology and Nongalactic Astrophysics · Physics 2019-06-19 Fei Qin , Cullan Howlett , Lister Staveley-Smith

We present preliminary results from the 2-degree Field (2dF) QSO Redshift Survey currently under way at the Anglo-Australian Telescope. This survey aims to determine the redshifts of >25000 QSOs over a redshift range of 0.3<z<3.0 with the…

Astrophysics · Physics 2007-05-23 S. M. Croom , T. Shanks , B. J. Boyle , R. J. Smith , L. Miller , N. S. Loaring

The shape of the primordial fluctuation spectrum is probed by cosmic microwave background fluctuations which measure density fluctuations at z~1000 on scales of hundreds of Mpc and from galaxy redshift surveys, which measure structure at…

Astrophysics · Physics 2014-10-13 Joseph Silk , Eric Gawiser

The simplest theory describing large-scale redshift-space distortions (RSD), based on linear theory and distant galaxies, depends on the growth of cosmological structure, suggesting that strong tests of General Relativity can be constructed…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-18 Lado Samushia , Will J. Percival , Alvise Raccanelli

Aims: We study galaxy clustering and explore the dependence of galaxy properties on the the environment up to a redshift z~1, on the basis of a deep multi-band survey in the Chandra Deep Field South. Methods: We have developed a new method…

Astrophysics · Physics 2009-11-11 Dario Trevese , Marco Castellano , Adriano Fontana , Emanuele Giallongo

We present the results of the 2MASS Redshift Survey (2MRS), a ten-year project to map the full three-dimensional distribution of galaxies in the nearby Universe. The 2 Micron All-Sky Survey (2MASS) was completed in 2003 and its final data…