# A 3-D model of polarised dust emission in the Milky Way

## TL;DR

This paper introduces a 3D model of polarized dust emission in the Milky Way, accounting for variations along the line of sight and small-scale fluctuations, to aid in CMB polarization studies.

## Contribution

The paper presents a novel 3D model of polarized dust emission that incorporates line-of-sight variations and small-scale fluctuations constrained by observations.

## Key findings

- Model matches large-scale dust emission observations.
- Extrapolates observed intensity and polarization power spectra to smaller scales.
- Provides a tool for assessing foreground impact on CMB polarization analysis.

## Abstract

We present a three-dimensional model of polarised galactic dust emission that takes into account the variation of the dust density, spectral index and temperature along the line of sight, and contains randomly generated small scale polarisation fluctuations. The model is constrained to match observed dust emission on large scales, and match on smaller scales extrapolations of observed intensity and polarisation power spectra. This model can be used to investigate the impact of plausible complexity of the polarised dust foreground emission on the analysis and interpretation of future CMB polarisation observations.