6533b7d1fe1ef96bd125c11f

RESEARCH PRODUCT

A New Numerical Approach to Estimate the Sunyaev–Zel’dovich Effect

Josep Vicent Arnau I CórdobaMàrius Josep Fullana I AlfonsoHugh M. P. CouchmanRobert J. ThackerDiego Pascual Sáez Milán

subject

BaryonPhysicsRay tracing (physics)Cosmic microwave backgroundDark matterAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsTest particleKinetic energySunyaev–Zel'dovich effectWeak gravitational lensing

description

Several years ago, we designed a particular ray tracing method. Combined with a Hydra parallel code (without baryons), it may compute some CMB anisotropies: weak lensing (WL) and Rees–Sciama (RS) effects. Only dark matter is fully necessary to estimate these effects. For very small angular scales, we made an exhaustive study leading to a lensing contribution slightly—but significantly—greater than previous ones. Afterwards, the same ray tracing procedure was included in a parallel Hydra code with baryons. The resulting code was then tested. This code is being currently applied to the study of the thermal and kinetic Sunyaev–Zel’dovich (SZ) contributions to the CMB anisotropies. We present here our first results.

yearjournalcountryeditionlanguage
2013-09-13
https://doi.org/10.1007/978-3-642-40157-2_38