Dust distribution in the Milky Way disk

To study the Galactic disk structure, we use the combination of the near-infrared survey 2MASS and Gaia DR2. We develop the Field Extinction - Distance Relation Deconvolver (FEDReD) algorithm to unravel distance and extinction. It is a Bayesian deconvolution algorithm which works field of view by field of view. It uses an empirical HR diagram built from Gaia DR2 and takes into account the surveys selection functions. We apply FEDReD in fields of view on the galactic plane (b = 0° and 0° < l < 360° ) to obtain an extinction map of the galactic disk. This map reveals some dust structures such as spiral arms and clouds.

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