402 citations · 2.4k across the 22 of their papers we have counts for
5 papers · 1 filter
Metals at the surface of last scatter
Yacine Ali-Haïmoud, Christopher M. Hirata, Marc Kamionkowski
Standard big-bang nucleosynthesis (BBN) predicts only a trace abundance of lithium and no heavier elements, but some alternatives predict a nonzero primordial metallicity. Here we…
Constraints on cosmic hemispherical power anomalies from quasars
Christopher M. Hirata
Recent analyses of the cosmic microwave background (CMB) maps from the WMAP satellite have uncovered evidence for a hemispherical power anomaly, i.e. a dipole modulation of the CMB…
A Scale-Dependent Power Asymmetry from Isocurvature Perturbations
Adrienne L. Erickcek, Christopher M. Hirata, Marc Kamionkowski
If the hemispherical power asymmetry observed in the cosmic microwave background (CMB) on large angular scales is attributable to a superhorizon curvaton fluctuation, then the simp…
Observing the Evolution of the Universe
James Aguirre, Alexandre Amblard, Amjad Ashoorioon +172
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the univers…
The Origin of the Universe as Revealed Through the Polarization of the Cosmic Microwave Background
S. Dodelson, R. Easther, S. Hanany +61
Modern cosmology has sharpened questions posed for millennia about the origin of our cosmic habitat. The age-old questions have been transformed into two pressing issues primed for…