The First 3$\pi$ 3D Map of ISM Dust Temperature
Ioana A. Zelko, Douglas P. Finkbeiner, Albert Lee, Gregory Green

TL;DR
This paper introduces the first large-scale 3D map of interstellar dust temperature, derived from existing reddening maps and emission data, revealing detailed temperature structures and variations along lines of sight.
Contribution
It presents a novel methodology to reconstruct 3D dust temperature maps with high fidelity, incorporating temperature and emissivity variations along the line of sight.
Findings
Successfully mapped dust temperature at multiple resolutions.
Detected distinct temperatures in complex dust clouds like Cepheus.
Identified significant variation in the emission-to-reddening conversion factor.
Abstract
We present the first large-scale 3D map of interstellar dust temperature. We build upon existing 3D reddening maps derived from starlight absorption (Bayestar19), covering 3/4 of the sky. Starting with the column density for each of 500 million 3D voxels, we propose a temperature and emissivity power-law slope () for each of them, and integrate along the line of sight to synthesize an emission map in five frequency bands observed by \emph{Planck} and \emph{IRAS}. The reconstructed emission map is constrained to match observations on a scale, and does so with good fidelity. We produce 3D temperature maps at resolutions of and . We assess performance on Cepheus, a dust cloud with two distinct components along the line of sight, and find distinct temperatures for the two components. We thus show that this methodology has enough precision to constrain clouds…
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Stellar, planetary, and galactic studies · Galaxies: Formation, Evolution, Phenomena
