Publications (36)
Statistics of Quasars Multiply Imaged by Galaxy Clusters
Joseph F. Hennawi, Neal Dalal, Paul Bode
We compute the expected number of quasars multiply imaged by cluster size dark halos for current wide field quasar surveys by carrying out a large ensemble of ray tracing simulatio…
Fast Identification of Bound Structures in Large N-body Simulations
Jochen Weller, Jeremiah P Ostriker, Paul Bode +1
We present an algorithm which is designed to allow the efficient identification and preliminary dynamical analysis of thousands of structures and substructures in large N-body simu…
Characterizing the Cluster Lens Population
Joseph F. Hennawi, Neal Dalal, Paul Bode +1
We present a detailed investigation into which properties of CDM halos make them effective strong gravitational lenses. Strong lensing cross sections of 878 clusters from an N-body…
A Simple and Accurate Model for Intra-Cluster Gas
Jeremiah P. Ostriker, Paul Bode, Arif Babul
Starting with the well-known NFW dark matter halo distribution, we construct a simple polytropic model for the intracluster medium which is in good agreement with high resolution n…
Templates for the Sunyaev-Zel'dovich Angular Power Spectrum
Hy Trac, Paul Bode, Jeremiah P. Ostriker
We present templates for the Sunyaev-Zel'dovich (SZ) angular power spectrum based on four models for the nonlinear gas distribution. The frequency-dependent SZ temperature fluctuat…
Accurate Realizations of the Ionized Gas in Galaxy Clusters: Calibrating Feedback
Paul Bode, Jeremiah P. Ostriker, Jochen Weller +1
Using the full, three-dimensional potential of galaxy cluster halos (drawn from an N-body simulation of the current, most favored cosmology), the distribution of the X-ray emitting…
Properties of Cold Dark Matter Halos at z>6
Renyue Cen, Feng Dong, Paul Bode +1
We compute the properties of dark matter halos with mass $10^{6.5}-10^9\msun$ at redshift in the standard cold dark matter cosmological model, utilizing a very high resolu…
Halo Formation in Warm Dark Matter Models
Paul Bode, Jeremiah P. Ostriker, Neil Turok
Discrepancies have emerged between the predictions of standard cold dark matter (CDM) theory and observations of clustering on sub-galactic scales. Warm dark matter (WDM) is a simp…
The Stellar Mass Growth of Brightest Cluster Galaxies in the IRAC Shallow Cluster Survey
Yen-Ting Lin, Mark Brodwin, Anthony H. Gonzalez +4
The details of the stellar mass assembly of brightest cluster galaxies (BCGs) remain an unresolved problem in galaxy formation. We have developed a novel approach that allows us to…
Evolution of the Cluster Correlation Function
Neta A. Bahcall, Lei Hao, Paul Bode +1
We study the evolution of the cluster correlation function and its richness-dependence from z = 0 to z = 3 using large-scale cosmological simulations. A standard flat LCDM model wi…
Where are the missing baryons in clusters?
Bilhuda Rasheed, Neta Bahcall, Paul Bode
Observations of clusters of galaxies suggest that they contain significantly fewer baryons (gas plus stars) than the cosmic baryon fraction. This `missing baryon' puzzle is especia…
Exploring the Energetics of Intracluster Gas with a Simple and Accurate Model
Paul Bode, Jeremiah P. Ostriker, Alexey Vikhlinin
The state of the hot gas in clusters of galaxies is investigated with a set of model clusters, created by assuming a polytropic equation of state (Gamma=1.2) and hydrostatic equili…
The Shape, Multiplicity, and Evolution of Superclusters in LambdaCDM Cosmology
James J. Wray, Neta A. Bahcall, Paul Bode +2
We determine the shape, multiplicity, size, and radial structure of superclusters in the LambdaCDM concordance cosmology from z = 0 to z = 2. Superclusters are defined as clusters…
Giant Arc Statistics In Concordance With A Concordance LCDM Universe
Joachim Wambsganss, Paul Bode, Jeremiah P. Ostriker
The frequency of giant arcs - highly distorted and strongly gravitationally lensed background galaxies - is a powerful test for cosmological models. Previous comparisons of arc sta…
Simulations of the Microwave Sky
Neelima Sehgal, Paul Bode, Sudeep Das +5
We create realistic, full-sky, half-arcminute resolution simulations of the microwave sky matched to the most recent astrophysical observations. The primary purpose of these simula…
Calibration of Nonthermal Pressure in Global Dark Matter Simulations of Clusters of Galaxies
Paul Bode, Jeremiah P. Ostriker, Renyue Cen +1
We present a new method for incorporating nonthermal pressure from bulk motions of gas into an analytic model of the intracluster medium in clusters of galaxies, which is based on…
Parallel Linear General Relativity and CMB Anisotropies
Paul Bode, Edmund Bertschinger
We have developed a code which links scalar-mode fluctuations in the early universe with those observable at the present time by integrating the coupled, linearized, Einstein, Bolt…
Tree-Particle-Mesh: an adaptive, efficient, and parallel code for collisionless cosmological simulation
Paul Bode, Jeremiah P. Ostriker
An improved implementation of an N-body code for simulating collisionless cosmological dynamics is presented. TPM (Tree-Particle-Mesh) combines the PM method on large scales with a…
The Richness-Dependent Cluster Correlation Function: Early SDSS Data
Neta A. Bahcall, Feng Dong, Lei Hao +4
The cluster correlation function and its richness dependence are determined from 1108 clusters of galaxies -- the largest sample of clusters studied so far -- found in 379 deg^2 of…
Luminous Red Galaxy Halo Density Field Reconstruction and Application to Large Scale Structure Measurements
Beth A. Reid, David N. Spergel, Paul Bode
The complex relationship between the galaxy density field and the underlying matter field limits our ability to extract cosmological constraints from galaxy redshift surveys. Our a…
Noise in strong lensing cosmography
Neal Dalal, Joseph Hennawi, Paul Bode
Giant arcs in strong lensing galaxy clusters can provide a purely geometric determination of cosmological parameters, such as the dark energy density and equation of state. We inve…
The Amplitude of Mass Fluctuations
Neta A. Bahcall, Paul Bode
We determine the linear amplitude of mass fluctuations in the universe, sigma_8, from the abundance of massive clusters at redshifts z=0.5 to 0.8. The evolution of massive clusters…
The Cluster Mass Function from Early SDSS Data: Cosmological Implications
Neta A. Bahcall, Feng Dong, Paul Bode +15
The mass function of clusters of galaxies is determined from 400 deg^2 of early commissioning imaging data of the Sloan Digital Sky Survey; ~300 clusters in the redshift range z =…
Cluster mass functions in the quintessential Universe
Ewa L. Lokas, Paul Bode, Yehuda Hoffman
We use -body simulations to measure mass functions in flat cosmological models with quintessence characterized by constant with , -2/3 and -1/2. The results are compar…
Microwave-Sky Simulations and Projections for Galaxy Cluster Detection with the Atacama Cosmology Telescope
Neelima Sehgal, Hy Trac, Kevin Huffenberger +1
We study the ability of three-frequency, arcminute-resolution microwave measurements to detect galaxy clusters via their Sunyaev-Zel'dovich (SZ) distortion of the microwave backgro…
The Mass Power Spectrum in Quintessence Cosmological Models
Chung-Pei Ma, R. R. Caldwell, Paul Bode +1
We present simple analytic approximations for the linear and fully evolved nonlinear mass power spectrum for spatially flat cold dark matter (CDM) cosmological models with quintess…
Evolution of the Cluster Mass and Correlation Functions in LCDM Cosmology
Joshua D. Younger, Neta A. Bahcall, Paul Bode
The evolution of the cluster mass function and the cluster correlation function from z = 0 to z = 3 are determined using 10^6 clusters obtained from high-resolution simulations of…
The Impact of Halo Properties, Energy Feedback and Projection Effects on the Mass-SZ Flux Relation
Laurie D. Shaw, Gilbert P. Holder, Paul Bode
We present a detailed analysis of the intrinsic scatter in the integrated SZ effect - cluster mass (Y-M) relation, using semi-analytic and simulated cluster samples. Specifically,…
The effect of baryon cooling on the statistics of giant arcs and multiple quasars
Joachim Wambsganss, Jeremiah P. Ostriker, Paul Bode
The statistics of giant arcs and large separation lensed quasars provide powerful constraints for the parameters of the underlying cosmological model. So far, most investigations h…
Cluster Ellipticities as a Cosmological Probe
Shirley Ho, Neta Bahcall, Paul Bode
We investigate the dependence of ellipticities of clusters of galaxies on cosmological parameters using large-scale cosmological simulations. We determine cluster ellipticities out…
Cosmological Constraints from a Combined Analysis of the Cluster Mass Function and Microwave Background Anisotropies
Alessandro Melchiorri, Paul Bode, Neta A. Bahcall +1
We present constraints on several cosmological parameters from a combined analysis of the most recent Cosmic Microwave Background anisotropy data and the Sloan Digital Sky Survey c…
Cluster Alignments and Ellipticities in LCDM Cosmology
Philip F. Hopkins, Neta Bahcall, Paul Bode
The ellipticities and alignments of clusters of galaxies, and their evolution with redshift, are examined in the context of a Lambda-dominated cold dark matter cosmology. We use a…
A Large Sky Simulation of the Gravitational Lensing of the Cosmic Microwave Background
Sudeep Das, Paul Bode
Large scale structure deflects cosmic microwave background (CMB) photons. Since large angular scales in the large scale structure contribute significantly to the gravitational lens…
The Tree-Particle-Mesh N-body Gravity Solver
Paul Bode, Jeremiah P. Ostriker, Guohong Xu
The Tree-Particle-Mesh (TPM) N-body algorithm couples the tree algorithm for directly computing forces on particles in an hierarchical grouping scheme with the extremely efficient…
Evolution of the Cluster Mass Function: Gpc^3 Dark Matter Simulations
Paul Bode, Neta A. Bahcall, Eric B. Ford +1
High-resolution N-body simulations of four popular Cold Dark Matter cosmologies (LCDM, OCDM, QCDM, and tilted SCDM), each containing 10^5 clusters of galaxies in a cubic gigaparsec…
Gravitational lensing in a concordance LCDM universe: The importance of secondary matter along the line of sight
Joachim Wambsganss, Paul Bode, Jeremiah P. Ostriker
To date, in almost all strong gravitational lensing analyses for modeling giant arc systems and multiple quasar images, it has been assumed that all the deflecting matter is concen…