Rozo, Eduardo, Rykoff, Eli S., Evrard, August, Becker, Matthew, McKay, Timothy, Wechsler, Risa H., ...
We measure the logarithmic scatter in mass at fixed richness for clusters in the maxBCG cluster catalog, an optically selected cluster sample drawn from SDSS imaging data. Our measurement is achieved...
An Improved Cluster Richness Estimator (2008)
Rozo, Eduardo, Rykoff, Eli S., Koester, Benjamin P., McKay, Timothy, Hao, Jiangang, Evrard, August, ...
Minimizing the scatter between cluster mass and accessible observables is an important goal for cluster cosmology. In this work, we introduce a new matched filter richness estimator, and test its...
The Effects of Halo Assembly Bias on Self-Calibration in Galaxy Cluster Surveys (2008)
Wu, Hao-Yi, Rozo, Eduardo, Wechsler, Risa H.
Self-calibration techniques for analyzing galaxy cluster counts utilize the abundance and the clustering amplitude of dark matter halos. These properties simultaneously constrain cosmological...
Biases in the Gravitational Lens Population Induced by Halo and Galaxy Triaxiality (2007)
Rozo, Eduardo, Chen, Jacqueline, Zentner, Andrew R.
The lensing cross section of triaxial halos depends on the relative orientation between a halo's principal axes and its line of sight. Consequently, a lensing subsample of randomly oriented halos is...
Johnston, David E., Sheldon, Erin S., Wechsler, Risa H., Rozo, Eduardo, Koester, Benjamin P., Frieman, Joshua A., ...
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...
Cosmological Constraints from SDSS maxBCG Cluster Abundances (2007)
Rozo, Eduardo, Wechsler, Risa H., Koester, Benjamin P., McKay, Timothy A., Evrard, August E., Johnston, David, ...
We perform a maximum likelihood analysis of the cluster abundance measured in the SDSS using the maxBCG cluster finding algorithm. Our analysis is aimed at constraining the power spectrum...
Optically-Selected Cluster Catalogs as a Precision Cosmology Tool (2007)
Rozo, Eduardo, Wechsler, Risa H., Koester, Benjamin P., Evrard, August E., McKay, Timothy A.
We introduce a framework for describing the halo selection function of optical cluster finders. We treat the problem as being separable into a term that describes the intrinsic galaxy content of a...
MaxBCG: A Red Sequence Galaxy Cluster Finder (2007)
Koester, Benjamin P., McKay, Timothy A., Annis, James, Wechsler, Risa H., Evrard, August E., Rozo, Eduardo, ...
Measurements of galaxy cluster abundances, clustering properties, and mass to- light ratios in current and future surveys can provide important cosmological constraints. Digital wide-field imaging...
The Impact of Baryonic Cooling on Giant Arc Abundances (2006)
Rozo, Eduardo, Nagai, Daisuke, Keeton, Charles, Kravtsov, Andrey
Using ray tracing for simple analytic profiles, we demonstrate that the lensing cross section for producing giant arcs has distinct contributions due to arcs formed through image distortion only, and...
Astrometric Perturbations in Substructure Lensing (2006)
Chen, Jacqueline, Rozo, Eduardo, Dalal, Neal, Taylor, James E.
In recent years, gravitational lensing has been used as a means to detect substructure in galaxy-sized halos, via anomalous flux ratios in quadruply-imaged lenses. In addition to causing anomalous...
Halo Model Analysis of Cluster Statistics (2004)
Rozo, Eduardo, Dodelson, Scott, Frieman, Joshua A.
We use the halo model formalism to provide expressions for cluster abundances and bias, as well as estimates for the correlation matrix between these observables. Off-diagonal elements due to scatter...
Primordial Gravity Waves and Weak Lensing (2003)
Dodelson, Scott, Rozo, Eduardo, Stebbins, Albert
Inflation produces a primordial spectrum of gravity waves in addition to the density perturbations which seed structure formation. We compute the signature of these gravity waves in the large scale...