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General relativistic effects have long been predicted to subtly influence the observed large-scale structure of the universe. The current generation of galaxy redshift surveys have reached a size where detection of such effects is becoming…

宇宙学与河外天体物理 · 物理学 2017-09-25 Shadab Alam , Hongyu Zhu , Rupert A. C. Croft , Shirley Ho , Elena Giusarma , Donald P. Schneider

We discuss some of the basic implications of recent results on galaxy correlations published by the SDSS collaboration. In particular we focus on the evidence which has been recently presented for the scale and nature of the transition to…

天体物理学 · 物理学 2009-11-10 M. Joyce , F. Sylos Labini , A. Gabrielli , M. Montuori , L. Pietronero

Two-dimensional high-resolution density field of galaxies of the Early Data Release of the Sloan Digital Sky Survey with a smoothing lengths 0.8 h^{-1} Mpc is applied to extract clusters of galaxies, and a low-resolution field with…

天体物理学 · 物理学 2011-03-03 J. Einasto , G. H"utsi , M. Einasto , E. Saar , D. L. Tucker , V. M"uller , P. Hein"am"aki , S. S. Allam

Understanding the clustering of galaxies has long been a goal of modern observational cosmology. Utilizing our photometric redshift technique a volume limited sample containing more than 2 million galaxies is constructed from the SDSS…

We interpret and model the statistical weak lensing measurements around 130,000 groups and clusters of galaxies in the Sloan Digital Sky Survey presented by Sheldon et al. 2007 (Paper I). We present non-parametric inversions of the 2D shear…

We present a novel approach for measuring the two-point correlation function of galaxies in narrow pencil beam surveys with varying depths. Our methodology is utilized to expand high-redshift galaxy clustering investigations up to $z \sim…

星系天体物理 · 物理学 2024-08-21 Nicolò Dalmasso , Michele Trenti , Nicha Leethochawalit

This is the first in a series of papers on the weak lensing effect caused by clusters of galaxies in Sloan Digital Sky Survey. The photometrically selected cluster sample, known as MaxBCG, includes ~130,000 objects between redshift 0.1 and…

We have investigated the statistical clustering properties of galaxies by calculating the 2-point galaxy correlation function from the Durham/UKST Galaxy Redshift Survey. This survey is magnitude limited to bj = 17, contains 2500 galaxies…

天体物理学 · 物理学 2009-10-30 A. Ratcliffe , T. Shanks , Q. A. Parker , R. Fong , .

We present a simple and efficient phenomenological model for the two-dimensional two-point galaxy correlation function that works well over a wide range of scales, from large scales down to scales as small as 25Mpc/h. Our model incorporates…

宇宙学与河外天体物理 · 物理学 2015-06-11 Chia-Hsun Chuang , Yun Wang

We use very large cosmological N--body simulations to obtain accurate predictions for the two-point correlations and power spectra of mass-limited samples of galaxy clusters. We consider two currently popular cold dark matter (CDM)…

We present a detailed analysis of the two-point correlation function, from the 2dF Galaxy Redshift Survey (2dFGRS). We estimate the redshift-space correlation function, xi(s), from which we measure the redshift-space clustering length,…

Imaging data from the Sloan Digital Sky Survey is used to measure the empirical size-richness relation for a large sample of galaxy clusters. Using population subtraction methods, we determine the radius at which the cluster galaxy number…

We present analyses of the two-point correlation properties of the ESP galaxy redshift survey. From the redshift-space correlation function xi(s), we see positive clustering out to separations ~50/h Mpc, with a smooth break on larger scales…

We use the 2dF Galaxy Group Catalogue constructed by Merch\'an & Zandivarez to study the large scale structure of the Universe traced by galaxy groups. We concentrate on the computation of the power spectrum and the two point correlation…

天体物理学 · 物理学 2009-11-07 Ariel Zandivarez , Manuel E. Merchan , Nelson D. Padilla

We perform a measurement of the mass--richness relation of the redMaPPer galaxy cluster catalogue using weak lensing data from the Sloan Digital Sky Survey. We have carefully characterized a broad range of systematic uncertainties,…

宇宙学与河外天体物理 · 物理学 2017-04-05 Melanie Simet , Tom McClintock , Rachel Mandelbaum , Eduardo Rozo , Eli Rykoff , Erin Sheldon , Risa H. Wechsler

We construct a large, redshift complete sample of distant galaxy clusters by correlating Sloan Digital Sky Survey (SDSS) Data Release 12 (DR12) redshifts with clusters identified with the red-sequence Matched-filter Probabilistic…

宇宙学与河外天体物理 · 物理学 2017-06-07 Pablo Jimeno , Tom Broadhurst , Ruth Lazkoz , Raul Angulo , Jose-Maria Diego , Keiichi Umetsu , Ming-chung Chu

We investigate the dependence of the strength of galaxy clustering on intrinsic luminosity using the Anglo-Australian two degree field galaxy redshift survey (2dFGRS). The 2dFGRS is over an order of magnitude larger than previous redshift…

We compare the large scale galaxy clustering in the new SDSS early data release (EDR) with the clustering in the APM Galaxy Survey. We cut out pixel maps (identical in size and shape) from the SDSS and APM data to allow a direct comparison…

天体物理学 · 物理学 2009-11-06 E. Gaztanaga

We investigate the clustering properties of galaxies in the recently completed ELAIS-S1 redshift survey through their spatial two point autocorrelation function. We used a sub-sample of the ELAIS-S1 catalog covering approximately 4 deg^2…

天体物理学 · 物理学 2009-11-10 V. D'Elia , E. Branchini , F. La Franca , V. Baccetti , I. Matute , F. Pozzi , C. Gruppioni