443 citations · 7.7k across the 153 of their papers we have counts for
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Measuring dark energy spatial inhomogeneity with supernova data
Asantha Cooray, Daniel E. Holz, Robert Caldwell
The gravitational lensing distortion of distant sources by the large-scale distribution of matter in the Universe has been extensively studied. In contrast, very little is known ab…
CMBPol Mission Concept Study: Gravitational Lensing
Kendrick M. Smith, Asantha Cooray, Sudeep Das +10
Gravitational lensing of the cosmic microwave background by large-scale structure in the late universe is both a source of cosmological information and a potential contaminant of p…
CMBPol Mission Concept Study: A Mission to Map our Origins
Daniel Baumann, Asantha Cooray, Scott Dodelson +7
Quantum mechanical metric fluctuations during an early inflationary phase of the universe leave a characteristic imprint in the polarization of the cosmic microwave background (CMB…
CMBPol Mission Concept Study: Probing Inflation with CMB Polarization
Daniel Baumann, Mark G. Jackson, Peter Adshead +56
We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of inflation. We focus on the prospects for using CMB measu…
CMBPol Mission Concept Study: Prospects for polarized foreground removal
J. Dunkley, A. Amblard, C. Baccigalupi +28
In this report we discuss the impact of polarized foregrounds on a future CMBPol satellite mission. We review our current knowledge of Galactic polarized emission at microwave freq…
An improved limit on the neutrino mass with CMB and redshift-dependent halo bias-mass relations from SDSS, DEEP2, and Lyman-Break Galaxies
Francesco De Bernardis, Paolo Serra, Asantha Cooray +1
We use measurements of luminosity-dependent galaxy bias at several different redshifts, SDSS at , DEEP2 at and LBGs at , combined with WMAP five-year cosmic mi…
Impact of Point Source Clustering on Cosmological Parameters with CMB Anisotropies
Paolo Serra, Asantha Cooray, Alexandre Amblard +2
The faint radio point sources that are unresolved in cosmic microwave background (CMB) anisotropy maps are likely to be a biased tracer of the large-scale structure dark matter dis…
The Experimental Probe of Inflationary Cosmology (EPIC): A Mission Concept Study for NASA's Einstein Inflation Probe
James Bock, Asantha Cooray, Shaul Hanany +7
This is the Phase 1 Report on the Experimental Probe of Inflationary Cosmology (EPIC), a mission concept study for NASA's Einstein Inflation Probe. When we began our study we sough…
Anisotropies in the Cosmic Neutrino Background after WMAP 5-year Data
Francesco De Bernardis, Luca Pagano, Paolo Serra +2
We search for the presence of cosmological neutrino background (CNB) anisotropies in recent WMAP 5-year data using their signature imprinted on modifications to cosmic microwave ba…
Weak Lensing of the Primary CMB Bispectrum
Asantha Cooray, Devdeep Sarkar, Paolo Serra
The cosmic microwave background (CMB) bispectrum is a well-known probe of the non-Gaussianity of primordial perturbations. Just as the intervening large-scale structure modifies th…
Cosmic Shear from Scalar-Induced Gravitational Waves
Devdeep Sarkar, Paolo Serra, Asantha Cooray +2
Weak gravitational lensing by foreground density perturbations generates a gradient mode in the shear of background images. In contrast, cosmological tensor perturbations induce a…
The inflationary gravitational-wave background and measurements of the scalar spectral index
Tristan L. Smith, Marc Kamionkowski, Asantha Cooray
Inflation predicts a stochastic background of gravitational waves over a broad range of frequencies, from those accessible with cosmic microwave background (CMB) measurements, to t…
Large Scale Structure as a Probe of Gravitational Slip
Scott F. Daniel, Robert R. Caldwell, Asantha Cooray +1
A new time-dependent, scale-independent parameter, \varpi, is employed in a phenomenological model of the deviation from General Relativity in which the Newtonian and longitudinal…
The trispectrum of 21-cm background anisotropies as a probe of primordial non-Gaussianity
Asantha Cooray, Chao Li, Alessandro Melchiorri
The 21-cm anisotropies from the neutral hydrogen distribution prior to the era of reionization is a sensitive probe of primordial non-Gaussianity. Unlike the case with cosmic micro…
Impact of Secondary non-Gaussianities on the Search for Primordial Non-Gaussianity with CMB Maps
Paolo Serra, Asantha Cooray
When constraining the primordial non-Gaussianity parameter f_NL with cosmic microwave background anisotropy maps, the bias resulting from the covariance between primordial non-Gaus…
Beyond Two Dark Energy Parameters
Devdeep Sarkar, Scott Sullivan, Shahab Joudaki +3
Our ignorance of the dark energy is generally described by a two-parameter equation of state. In these approaches a particular {\it ad hoc} functional form is assumed, and only two…
Red Density Perturbations and Inflationary Gravitational Waves
Luca Pagano, Asantha Cooray, Alessandro Melchiorri +1
We study the implications of recent indications for a red spectrum of primordial density perturbations for the detection of inflationary gravitational waves (IGWs) with forthcoming…
Narrowing Constraints with Type Ia Supernovae: Converging on a Cosmological Constant
Scott Sullivan, Asantha Cooray, Daniel E. Holz
We apply a parameterization-independent approach to fitting the dark energy equation-of-state (EOS). Utilizing the latest type Ia supernova data, combined with results from the cos…
Phenomenology of D-Brane Inflation with General Speed of Sound
Hiranya V. Peiris, Daniel Baumann, Brett Friedman +1
A characteristic of D-brane inflation is that fluctuations in the inflaton field can propagate at a speed significantly less than the speed of light. This yields observable effects…
Constraints on a New Post-General Relativity Cosmological Parameter
Robert Caldwell, Asantha Cooray, Alessandro Melchiorri
A new cosmological variable is introduced which characterizes the degree of departure from Einstein's General Relativity (GR) with a cosmological constant. The new parameter, \varp…
Anisotropy Studies of the Unresolved Far-infrared Background
Alexandre Amblard, Asantha Cooray
Dusty, starforming galaxies and active galactic nuclei that contribute to the integrated background intensity at far-infrared wavelengths trace the large-scale structure. Below the…
Cross-correlation studies as a probe of reionization physics
Anze Slosar, Asantha Cooray, Joseph Silk
The process of reionization is now believed to have proceeded in an orchestrated manner beginning with UV photons emitted by high redshift galaxies containing a large fraction of P…
IR Background Anisotropies in Spitzer GOODS images and constraints on first galaxies
Asantha Cooray, Ian Sullivan, Ranga-Ram Chary +6
We describe the angular power spectrum of unresolved 3.6 micron IR light in Spitzer GOODS fields. The amplitude of the anisotropy spectrum decreases with decreasing flux threshold…
Direct Reconstruction of the Dark Energy Scalar-Field Potential
Chao Li, Daniel E. Holz, Asantha Cooray
While the accelerated expansion of the Universe is by now well established, an underlying scalar field potential possibly responsible for this acceleration remains unconstrained. W…