381 citations · 5.6k across the 64 of their papers we have counts for
5 papers · 1 filter
Photon Regeneration from Pseudoscalars at X-ray Laser Facilities
Raul Rabadan, Andreas Ringwald, Kris Sigurdson
Recently, the PVLAS collaboration has reported an anomalously large rotation of the polarization of light in the presence of a magnetic field. As a possible explanation they consid…
Cosmological Signatures of Interacting Neutrinos
Nicole F. Bell, Elena Pierpaoli, Kris Sigurdson
We investigate signatures of neutrino scattering in the Cosmic Microwave Background (CMB) and matter power spectra, and the extent to which present cosmological data can distinguis…
Measuring the Primordial Deuterium Abundance During the Cosmic Dark Ages
Kris Sigurdson, Steven R. Furlanetto
We discuss how measurements of fluctuations in the absorption of cosmic microwave background (CMB) photons by neutral gas during the cosmic dark ages, at redshifts z ~ 7--200, coul…
Cosmic 21-cm Delensing of Microwave Background Polarization and the Minimum Detectable Energy Scale of Inflation
Kris Sigurdson, Asantha Cooray
The curl (B) modes of cosmic microwave background (CMB) polarization anisotropies are a unique probe of the primordial background of inflationary gravitational waves (IGWs). Unfort…
How Dark is 'Dark'? Electromagnetic Interactions in the Dark Sector
Kris Sigurdson
We review the physical and cosmological consequences of two possible electromagnetic couplings to the dark sector: (i) a neutral lightest dark-matter particle (LDP) with nonzero el…