Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications (2008)
Giannantonio, Tommaso, Scranton, Ryan, Crittenden, Robert G., Nichol, Robert C., Boughn, Stephen P., Myers, Adam D., ...
We present a global measurement of the integrated Sachs-Wolfe (ISW) effect obtained by cross-correlating all relevant large scale galaxy data sets with the cosmic microwave background radiation map...
A high redshift detection of the integrated Sachs-Wolfe effect (2006)
Giannantonio, Tommaso, Crittenden, Robert G., Nichol, Robert C., Scranton, Ryan, Richards, Gordon T., Myers, Adam D., ...
We present evidence of a large angle correlation between the cosmic microwave background measured by WMAP and a catalog of photometrically detected quasars from the SDSS. The observed cross...
Investigating dark energy experiments with principal components (2005)
Crittenden, Robert G., Pogosian, Levon
We use a principle component approach to contrast different kinds of probes of dark energy, and to emphasize how an array of probes can work together to constrain an arbitrary equation of state...
Bond, J. Richard, Crittenden, Robert G.
We describe the subject of Cosmic Microwave Background (CMB) analysis - its past, present and future. The theory of Gaussian primary anisotropies, those arising from linear physics operating in the...
Do angular momentum induced ellipticity correlations contaminate weak lensing measurements? (2001)
Natarajan, Priyamvada, Crittenden, Robert G., Pen, Ue-Li, Theuns, Tom
Alignments in the angular momentum vectors of galaxies can induce large scale correlations in their projected orientations. Such alignments arise from the tidal torques exerted on neighboring...
Crittenden, Robert G., Natarajan, Priyamvada, Pen, Ue-Li, Theuns, Tom
The distortion field defined by the ellipticities of galaxy shapes projected on the sky can be uniquely decomposed into a gradient and a curl component. If the observed ellipticities are induced by...
Spin induced galaxy alignments and their implications for weak lensing measurements (2000)
Crittenden, Robert G., Natarajan, Priyamvada, Pen, Ue-Li, Theuns, Tom
Large scale correlations in the orientations of galaxies can result from alignments in their angular momentum vectors. These alignments arise from the tidal torques exerted on neighboring...
Computing challenges of the Cosmic Microwave Background (1999)
Bond, J. Richard, Crittenden, Robert G., Jaffe, Andrew H., Knox, Lloyd
The Cosmic Microwave Background (CMB) encodes information on the origin and evolution of the universe, buried in a fractional anisotropy of one part in 100,000 on angular scales from arcminutes to...
Upcoming microwave background experiments will see an incredible increase in the volume of data to be analyzed, which makes the choice of how it is discretized on the sky a crucial issue. I discuss...
Exactly Azimuthal Pixelizations of the Sky (1998)
Crittenden, Robert G., Turok, Neil G.
We investigate various pixelizations of the sky which allow for fast spherical transforms, for implementation in full sky CMB experiments such as Planck and MAP. We study the effect of varying pixel...
Looking for $\Lambda$ with the Rees-Sciama Effect (1995)
Crittenden, Robert G., Turok, Neil
In models with a cosmological constant, a significant component of the large scale cosmic microwave background (CMB) anisotropy is produced at rather low redshifts, z < 1. In these models, the...
Polarization and Anisotropy of the Microwave Sky (1994)
Coulson, David, Crittenden, Robert G., Turok, Neil
We study the polarization-polarization and polarization-temperature correlations in standard adiabatic scenarios for structure formation. Temperature anisotropies due to gravitational potential wells...