Simulating the Universe with MICE: The abundance of massive clusters (2009)
Crocce, Martin, Fosalba, Pablo, Castander, Francisco J., Gaztanaga, Enrique
We introduce a new set of large N-body runs, the MICE simulations, that provide a unique combination of very large cosmological volumes with good mass resolution. They follow the gravitational...
Norberg, Peder, Baugh, Carlton, Gaztanaga, Enrique, Croton, D. J.
We present a test of different error estimators for two-point clustering statistics, appropriate for present and future large galaxy redshift surveys. Using an ensemble of very large dark matter...
Norberg, Peder, Baugh, Carlton, Gaztanaga, Enrique, Croton, D. J.
We present a test of different error estimators for two-point clustering statistics, appropriate for present and future large galaxy redshift surveys. Using an ensemble of very large dark matter...
The anisotropic redshift space galaxy correlation function: detection on the BAO Ring (2008)
Gaztanaga, Enrique, Cabre, Anna
In a series of papers we have recently studied the clustering of LRG galaxies in the latest spectroscopic SDSS data release, which has 75000 LRG galaxies sampling 1.1 Gpc^3/h^3 to z=0.47. Here we...
Norberg, Peder, Baugh, Carlton M., Gaztanaga, Enrique, Croton, Darren J.
We present a test of different error estimators for 2-point clustering statistics, appropriate for present and future large galaxy redshift surveys. Using an ensemble of very large dark matter...
First Cosmological Constraints on Dark Energy from the Radial Baryon Acoustic Scale (2008)
Gaztanaga, Enrique, Miquel, Ramon, Sanchez, Eusebio
We discuss cosmological constraints arising from the first measurement of the radial (line-of-sight) baryon acoustic oscillations (BAO) scale in the large scale structure traced by the galaxy...
Gaztanaga, Enrique, Cabre, Anna, Hui, Lam
This is the 4th paper in a series where we study the clustering of LRG galaxies in the latest spectroscopic SDSS data release, DR6, which has 75000 LRG galaxies sampling 1.1 (Gpc/h)^3 to z=0.47. Here...
Clustering of luminous red galaxies II: small scale redshift space distortions (2008)
Cabre, Anna, Gaztanaga, Enrique
This is the second paper of a series where we study the clustering of LRG galaxies in the latest spectroscopic SDSS data release, DR6, which has 75000 LRG galaxies covering over 1 $Gpc^3/h^3$ for...
Clustering of luminous red galaxies I: large scale redshift space distortions (2008)
Cabre, Anna, Gaztanaga, Enrique
This is the first paper of a series where we study the clustering of LRG galaxies in the latest spectroscopic SDSS data release, DR6, which has 75000 LRG galaxies covering over 1 $Gpc^3/h^3$ at $0.15
The scale dependence of mass assembly in galaxies (2008)
Mateus, Abilio, Jimenez, Raul, Gaztanaga, Enrique
We compare the results of the mark correlation analysis of galaxies in a sample from the Sloan Digital Sky Survey and from two galaxy catalogs obtained by semi-analytical galaxy formation models...
Constraining neutrino masses with the ISW-galaxy correlation function (2007)
Lesgourgues, Julien, Valkenburg, Wessel, Gaztanaga, Enrique
Temperature anisotropies in the Cosmic Microwave Background (CMB) are affected by the late Integrated Sachs-Wolfe (lISW) effect caused by any time-variation of the gravitational potential on linear...
Hui, Lam, Gaztanaga, Enrique, LoVerde, Marilena
In paper I of this series we discuss how magnification bias distorts the 3D correlation function by enhancing the observed correlation in the line-of-sight (LOS) orientation, especially on large...
LoVerde, Marilena, Hui, Lam, Gaztanaga, Enrique
It is well known that magnification bias, the modulation of galaxy or quasar source counts by gravitational lensing, can change the observed angular correlation function. We investigate...
Anisotropic Magnification Distortion of the 3D Galaxy Correlation: I. Real Space (2007)
Hui, Lam, Gaztanaga, Enrique, LoVerde, Marilena
It is well known gravitational lensing, mainly via magnification bias, modifies the observed galaxy/quasar clustering. Such discussions have largely focused on the 2D angular correlation. Here and in...
The SCUBA HAlf Degree Extragalactic Survey (SHADES) - IV: Radio-mm-FIR photometric redshifts (2007)
Aretxaga, Itziar, Hughes, David H., Coppin, Kristen, Mortier, Angela M. J., Wagg, Jeff, Dunlop, James S., ...
We present the redshift distribution of the SHADES galaxy population based on the rest-frame radio-mm-FIR colours of 120 robustly detected 850um sources in the Lockman Hole East (LH) and Subaru...
Error analysis in cross-correlation of sky maps: application to the ISW detection (2007)
Cabre, Anna, Fosalba, Pablo, Gaztanaga, Enrique, Manera, Marc
Constraining cosmological parameters from measurements of the Integrated Sachs-Wolfe effect requires developing robust and accurate methods for computing statistical errors in the cross-correlation...
Croton, Darren J., Norberg, Peder, Gaztanaga, Enrique, Baugh, Carlton M.
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...
Magnification-Temperature Correlation: the Dark Side of ISW Measurements (2006)
LoVerde, Marilena, Hui, Lam, Gaztanaga, Enrique
Integrated Sachs-Wolfe (ISW) measurements, which involve cross-correlating the CMB with the foreground large-scale structure (e.g. galaxies/quasars), have proven to be an interesting probe of dark...
Croton, Darren J., Norberg, Peder, Gaztanaga, Enrique, Baugh, Carlton M.
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...
Dark Energy Studies: Challenges to Computational Cosmology (2005)
Annis, James, Castander, Francisco J., Evrard, August E., Frieman, Joshua A., Gaztanaga, Enrique, Jain, Bhuvnesh, ...
The ability to test the nature of dark mass-energy components in the universe through large-scale structure studies hinges on accurate predictions of sky survey expectations within a given world...
Constraining Dark Energy with the Dark Energy Survey: Theoretical Challenges (2005)
Annis, James, Bridle, Sarah, Castander, Francisco J., Evrard, August E., Fosalba, Pablo, Frieman, Joshua A., ...
The Dark Energy Survey (DES) will use a new imaging camera on the Blanco 4-m telescope at CTIO to image 5000 square degrees of sky in the South Galactic Cap in four optical bands, and to carry out...
Van Kampen, Eelco, Percival, Will J., Crawford, Miller, Dunlop, James S., Scott, Susie E., Bevis, Neil, ...
We present predictions for the angular correlation function and redshift distribution for SHADES, the SCUBA HAlf-Degree Extragalactic Survey, which will yield a sample of around 300 sub-mm sources in...
The 2dF Galaxy Redshift Survey: higher-order galaxy correlation functions (2004)
Croton, Darren J., Gaztanaga, Enrique, Baugh, Carlton, Norberg, Peder, Colless, Matthew, Baldry, Ivan K., ...
We measure moments of the galaxy count probability distribution function in the Two-degree Field Galaxy Redshift Survey (2dFGRS). The survey is divided into volume-limited subsamples in order to...
The 2dF Galaxy Redshift Survey: hierarchical galaxy clustering (2004)
Baugh, Carlton, Croton, Darren J., Gaztanaga, Enrique, Norberg, Peder, Colless, Matthew, Baldry, Ivan K., ...
We use the Two-Degree Field Galaxy Redshift Survey (2dFGRS) to test the hierarchical scaling hypothesis: namely, that the p-point galaxy correlation functions can be written in terms of the two-point...
The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models (2004)
Croton, Darren J., Colless, Matthew, Gaztanaga, Enrique, Baugh, Carlton, Norberg, Peder, Baldry, Ivan K., ...
We measure the redshift-space reduced void probability function (VPF) for 2dFGRS volume-limited galaxy samples covering the absolute magnitude range MbJ -5log10 h = -18 to -22. Theoretically, the VPF...
The 2dF Galaxy Redshift Survey: higher-order galaxy correlation functions (2004)
Croton, Darren J., Gaztanaga, Enrique, Baugh, Carlton, Norberg, Peder, Colless, Matthew, Baldry, Ivan K., ...
We measure moments of the galaxy count probability distribution function in the Two-degree Field Galaxy Redshift Survey (2dFGRS). The survey is divided into volume-limited subsamples in order to...
The 2dF Galaxy Redshift Survey: hierarchical galaxy clustering (2004)
Baugh, Carlton, Croton, Darren J., Gaztanaga, Enrique, Norberg, Peder, Colless, Matthew, Baldry, Ivan K., ...
We use the Two-Degree Field Galaxy Redshift Survey (2dFGRS) to test the hierarchical scaling hypothesis: namely, that the p-point galaxy correlation functions can be written in terms of the two-point...
The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models (2004)
Croton, Darren J., Colless, Matthew, Gaztanaga, Enrique, Baugh, Carlton, Norberg, Peder, Baldry, Ivan K., ...
We measure the redshift-space reduced void probability function (VPF) for 2dFGRS volume-limited galaxy samples covering the absolute magnitude range MbJ -5log10 h = -18 to -22. Theoretically, the VPF...
Cross-correlating the Microwave Sky with Galaxy Surveys (2003)
Fosalba, Pablo, Gaztanaga, Enrique, Castander, Francisco J.
We present results for the cross-correlation between the WMAP 1st-year cosmic microwave background (CMB) anisotropy data and optical galaxy surveys: the APM and SDSS DR1 catalogs. Our measurement of...
Detection of the ISW and SZ effects from the CMB-Galaxy correlation (2003)
Fosalba, Pablo, Gaztanaga, Enrique, Castander, Francisco
We present a cross-correlation analysis of the WMAP cosmic microwave background (CMB) temperature anisotropies and the SDSS galaxy density fluctuations. We find significant detections of the angular...
Fosalba, Pablo, Gaztanaga, Enrique
Models with late time cosmic acceleration, such as the Lambda-dominated CDM model, predict a freeze out for the growth of linear gravitational potential at moderate redshift z
An estimate of \Omega_m without priors (2003)
Feldman, Hume A., Juszkiewicz, Roman, Ferreira, Pedro, Davis, Marc, Gaztanaga, Enrique, Fry, James N., ...
Using mean relative peculiar velocity measurements for pairs of galaxies, we estimate the cosmological density parameter $\Omega_m$ and the amplitude of density fluctuations $\sigma_8$. Our results...
Cross-correlating the Microwave Sky with Galaxy Surveys (2003)
Fosalba, Pablo, Gaztanaga, Enrique, Castander, Francisco
We present results for the cross-correlation between the WMAP 1st-year cosmic microwave background (CMB) anisotropy data and optical galaxy surveys: the APM and SDSS DR1 catalogs. Our measurement of...
Cross-correlating the Microwave Sky with Galaxy Surveys (2003)
Fosalba, Pablo, Gaztanaga, Enrique, Castander, Francisco
We present results for the cross-correlation between the WMAP 1st-year cosmic microwave background (CMB) anisotropy data and optical galaxy surveys: the APM and SDSS DR1 catalogs. Our measurement of...
We report a detection of galaxy-QSO cross-correlation w_GQ in the Sloan Digital Sky Survey (SDSS) Early Data Release (EDR) over 0.2-30 arc-minute scales. We cross-correlate galaxy samples of...
Aretxaga, Itziar, Hughes, David H., Chapin, Edward, Gaztanaga, Enrique
More than 150 galaxies have been detected in blank-field millimetre and sub-millimetre surveys. However the redshift distribution of sub-mm galaxies remains uncertain due to the difficulty in...
Large scale structures in the Early SDSS: Comparison of the North and South Galactic strips (2001)
We compare the large scale galaxy clustering between the North and South SDSS early data release (EDR) and also with the clustering in the APM Galaxy Survey. The three samples are independent and...
Scherrer, Robert J., Gaztanaga, Enrique
We use the spherical collapse (SC) approximation to derive expressions for the smoothed redshift-space probability distribution function (PDF), as well as the $p$-order hierarchical amplitudes $S_p$,...
Clustering in Deep (Submillimeter) Surveys (2001)
Gaztanaga, Enrique, Hughes, David H.
Hughes & Gaztanaga (2001, see article in these proceedings) have presented realistic simulations to address key issues confronting existing and forthcoming submm surveys. An important aspect...
Barriga, Jose, Gaztanaga, Enrique, Santos, Mario, Sarkar, Subir
Adams et al. (1997b) have noted that according to our current understanding of the unification of fundamental interactions, there should have been phase transitions associated with spontaneous...
Clusters of Galaxies at High Redshift: The LMT/GTM Perspective (2000)
Lopez-Cruz, Omar, Gaztanaga, Enrique
The lack of reliable cluster samples at intermediate and high redshift has motivated many optical/infrared and X-ray cluster searches. The motivation of such searches is well justified: the abundance...
The transition to nonlinearity and new constraints on biasing (2000)
Juszkiewicz, Roman, Gaztanaga, Enrique
We present two new dynamical tests of the biasing hypothesis. The first is based on the amplitude and the shape of the galaxy-galaxy correlation function, $\xi_g(r)$, where $r$ is the separation of...
Simulated Submillimetre Galaxy Surveys (2000)
Hughes, David H., Gaztanaga, Enrique
Current submillimetre surveys are hindered in their ability to reveal detailed information on the epoch of galaxy formation and the evolutionary history of a high-redshift starburst galaxy...
Large Scale Structure in the weakly non-linear regime (2000)
Is gravitational growth responsible for the observed large scale structure in the universe? Do we need non-gaussian initial conditions or non-gravitational physics to explain the large scale features...
Gaztanaga, Enrique, Lobo, Alberto
We reconsider the problem of gravitational structure formation inside and outside General Relativity (GR), both in the weakly and strongly non-linear regime. We show how these regimes can be explored...
Inverting the Angular Correlation Function (1999)
Dodelson, Scott, Gaztanaga, Enrique
The two point angular correlation function is an excellent measure of structure in the universe. To extract from it the three dimensional power spectrum, one must invert Limber's Equation. Here we...
Predictions for the clustering properties of the Lyman-alpha Forest - I. One-point statistics (1998)
Gaztanaga, Enrique, Croft, Rupert A. C.
We present predictions for the one-point probability distribution and cumulants of the transmitted QSO flux in the high redshift Lyman-$\alpha$ Forest. We make use of the correlation between the...
Biased-estimations of the Variance and Skewness (1998)
Nonlinear combinations of direct observables are often used to estimate quantities of theoretical interest. Without sufficient caution, this could lead to biased estimations. An example of great...
Information content in Gaussian noise: optimal compression rates (1998)
Romeo, August, Gaztanaga, Enrique, Barriga, Jose, Elizalde, Emilio
We approach the theoretical problem of compressing a signal dominated by Gaussian noise. We present expressions for the compression ratio which can be reached, under the light of Shannon's noiseless...
Gaztanaga, Enrique, Fosalba, Pablo
In Part I of this series, we introduced the Spherical Collapse (SC) approximation in Lagrangian space as a way of estimating the cumulants $\xi_J$ of density fluctuations in cosmological Perturbation...
The Space Density of Galaxy Peaks and the Linear Matter Power Spectrum (1997)
Croft, Rupert A. C., Gaztanaga, Enrique
One way of recovering information about the initial conditions of the Universe is by measuring features of the cosmological density field which are preserved during gravitational evolution and galaxy...
High-order galaxy correlation functions in the APM Galaxy Survey (1993)
We estimate J-point galaxy averaged correlation functions $\wbar_J(\theta)$ for $J=2,...,9$, in a sample of the APM Galaxy Survey with more than $1.3 \times 10^6$ galaxies and a depth $ \calD \sim...
The Three-point Function as a Probe of Models for Large-scale Structure (1993)
Frieman, Joshua A., Gaztanaga, Enrique
We analyze the consequences of models of structure formation for higher-order ($n$-point) galaxy correlation functions in the mildly non-linear regime. Several variations of the standard $\Omega=1$...
Redshift distortions of galaxy correlation functions (1993)
Fry, J. N., Gaztanaga, Enrique
To examine how peculiar velocities can affect the 2-, 3-, and 4-point redshift correlation functions, we evaluate volume-average correlations for configurations that emphasize and minimize redshift...
Biasing and Hierarchical Statistics in Large-scale Structure (1993)
Fry, J. N., Gaztanaga, Enrique
In the current paradigm there is a non-trivial bias expected in the process of galaxy formation. Thus, the observed statistical properties of the galaxy distribution do not necessarily extend to the...