$Ab$ $initio$ modeling of Galactic dust polarized CMB foreground

TL;DR

This paper uses high-resolution simulations of magnetized interstellar turbulence to analyze Galactic dust polarization maps, providing insights into the physical origins of observed CMB foreground features.

Contribution

It introduces a turbulence model that reproduces Planck's spectral properties and explains the physical basis of E/B asymmetry and TE signals in dust polarization.

Findings

Simulations match Planck's E- and B-mode spectral properties.

The model explains the physical origins of E/B asymmetry.

Insights into the positive TE signal in dust polarization.

Abstract

We present the analysis of high-resolution synthetic dust polarization maps derived from large-scale simulations of magnetized multiphase interstellar turbulence carried out with the AthenaK code on the $Frontier$ exascale supercomputer at the Oak Ridge National Laboratory. Our turbulence model accurately captures spectral properties of the $E$- and $B$-modes measured by $Planck$ at 353 GHz. The simulations provide new insights into the physical origins of the observed $E/B$ asymmetry and positive $TE$ signal, facilitating the development of advanced models of Galactic foreground emission for current and future CMB experiments.