130 citations · 346 across the 5 of their papers we have counts for
5 papers
Signatures of non-gaussianity in the isocurvature modes of primordial black hole dark matter
Sam Young, Christian T. Byrnes
Primordial black holes (PBHs) are black holes which may have formed very early on during the radiation dominated era in the early universe. We present here a method by which the la…
Lecture notes on non-Gaussianity
Christian T. Byrnes
We discuss how primordial non-Gaussianity of the curvature perturbation helps to constrain models of the early universe. Observations are consistent with Gaussian initial condition…
The long-short wavelength mode coupling tightens primordial black hole constraints
Sam Young, Christian T. Byrnes
The effects of non-gaussianity on the constraints on the primordial curvature perturbation power spectrum from primordial black holes (PBHs) are considered. We extend previous anal…
Inflationary Infrared Divergences: Geometry of the Reheating Surface vs. delta N Formalism
Christian T. Byrnes, Mischa Gerstenlauer, Arthur Hebecker +2
We describe a simple way of incorporating fluctuations of the Hubble scale during the horizon exit of scalar perturbations into the delta N formalism. The dominant effect comes fro…
CMB Constraints on Primordial non-Gaussianity from the Bispectrum (f_{NL}) and Trispectrum (g_{NL} and τ_{NL}) and a New Consistency Test of Single-Field Inflation
Joseph Smidt, Alexandre Amblard, Christian T. Byrnes +3
We outline the expected constraints on non-Gaussianity from the cosmic microwave background (CMB) with current and future experiments, focusing on both the third (f_{NL}) and fourt…