6533b853fe1ef96bd12add3e
RESEARCH PRODUCT
Improving on numerical simulations of nonlinear CMB anisotropies
Robert J. ThackerMàrius Josep Fullana I AlfonsoDiego Pascual Sáez MilánHugh M. P. CouchmanJosep Vicent Arnau I Córdobasubject
PhysicsHistoryNonlinear systemCosmic microwave backgroundResolution improvementAstrophysics::Cosmology and Extragalactic AstrophysicsStatistical physicsFocus (optics)AnisotropySofteningWeak gravitational lensingComputer Science ApplicationsEducationdescription
An Adaptative-Particle-Particle-Particle-Mesh code (HYDRA) plus a ray-tracing procedure was used in [1] to perform an exhaustive analysis of the weak lensing anisotropy. Other nonlinear Cosmic Microwave Background anisotropies, such as the Rees-Sciamaand the Sunyaev-Zel.dovicheffects are also being studied by using the same tools. Here we present some advances in our study of these nonlinear anisotropies. The primary advance is due to the use of better simulations with greater particle densities and appropriate softening, although other parameters have also been adjusted to get better estimates. Thus, we improve on a previous paper [2] where the Rees-Sciamaeffect was studied with Particle-Mesh simulations. We focus particular attention on the resolution improvement and its consequences.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-04-28 | Journal of Physics: Conference Series |