![]() ![]() Its main features are found to be elongated along different directions that vary from below to above the mid-plane. We present the resulting 3D distribution of the dust in a 6 × 6 × 0.8 kpc 3 volume around the Sun. Each inverted distribution serves as a prior for the subsequent step, and the spatial resolution is progressively increased. Each step associates regularized Bayesian inversions in all radial directions and a subsequent inversion in 3D of all their results. We applied a new hierarchical inversion algorithm to the individual extinctions that is adapted to large datasets and to an inhomogeneous target distribution. To do so, Gaia DR2 photometric data were combined with 2MASS measurements to derive extinction toward stars that possess accurate photometry and relative uncertainties on DR2 parallaxes smaller than 20%. We built 3D maps of the dust in the Local arm and surrounding regions. ![]() 3D maps of the interstellar dust provide complementary information and are a tool for a wide range of uses. Gaia stellar measurements are currently revolutionizing our knowledge of the evolutionary history of the Milky Way. ISTerre, Université Grenoble Alpes, France GEPI, Observatoire de Paris, PSL University, CNRS, 5 Place Jules Janssen, 92190 Meudon, FranceĮ-mail: IPAG, Université Grenoble Alpes, 38000 Grenoble, France Astronomical objects: linking to databases.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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