60 citations · 114 across the 6 of their papers we have counts for
6 papers
Flows For The Masses: A multi-fluid non-linear perturbation theory for massive neutrinos
Joe Zhiyu Chen, Amol Upadhye, Yvonne Y. Y. Wong
Velocity dispersion of the massive neutrinos presents a daunting challenge for non-linear cosmological perturbation theory. We consider the neutrino population as a collection of n…
Hybrid multi-fluid-particle simulations of the cosmic neutrino background
Joe Zhiyu Chen, Markus R. Mosbech, Amol Upadhye +1
Simulation of the cosmic clustering of massive neutrinos is a daunting task, due both to their large velocity dispersion and to their weak clustering power becoming swamped by Pois…
Weaker yet again: mass spectrum-consistent cosmological constraints on the neutrino lifetime
Joe Zhiyu Chen, Isabel M. Oldengott, Giovanni Pierobon +1
We consider invisible neutrino decay in the ultra-relativistic limit and compute the neutrino anisotropy loss rate relevant for the cosmic microwave background (C…
One line to run them all: SuperEasy massive neutrino linear response in -body simulations
Joe Zhiyu Chen, Amol Upadhye, Yvonne Y. Y. Wong
We present in this work a novel and yet extremely simple method for incorporating the effects of massive neutrinos in cosmological -body simulations. This so-called "SuperEasy l…
The cosmic neutrino background as a collection of fluids in large-scale structure simulations
Joe Zhiyu Chen, Amol Upadhye, Yvonne Y. Y. Wong
A significant challenge for modelling the massive neutrino as a hot dark matter is its large velocity dispersion. In this work, we investigate and implement a multi-fluid perturbat…
Invisible neutrino decay in precision cosmology
Gabriela Barenboim, Joe Zhiyu Chen, Steen Hannestad +3
We revisit the topic of invisible neutrino decay in the precision cosmological context, via a first-principles approach to understanding the cosmic microwave background and large-s…