Statistical signatures of interstellar turbulence in dust polarization maps

TL;DR

This paper uses high-resolution simulations to replicate Planck observations of dust polarization, revealing the physical origins of observed E/B asymmetry and TE signals, aiding future CMB studies.

Contribution

The study introduces a detailed turbulence simulation that accurately reproduces Planck dust polarization measurements, offering new insights into interstellar turbulence and dust emission modeling.

Findings

Simulation matches Planck EE and BB spectra

Reproduces observed EE/BB ratio and PDF of polarization fraction

Explains the physical origin of E/B asymmetry and TE correlation

Abstract

We present results from a high-resolution interstellar turbulence simulation and show that it closely reproduces recent $Planck$ measurements. Our model captures the scaling of $EE$ and $BB$ spectra, and the $EE/BB$ ratio in the inertial range. The probability density function of the dust polarization fraction is also consistent with observations. The $TE$ cross-correlation is in broad agreement with the $Planck$ sky. This simulation provides new insights into the physical origins of the observed $E/B$ asymmetry and positive $TE$ signal, facilitating the development of advanced Galactic dust emission models for current and future cosmic microwave background experiments.