Abstract

The distribution of visual interstellar extinction A V has been mapped in selected areas over the Southern sky, using RAVEDR6 and Gaia EDR3 data. A V was modelled as a barometric function of galactic latitude and distance. The functionparameters were then approximated by spherical harmonics. The resulting analytical 3D model of the interstellar extinctioncan be used to predict A V values for stars with known parallaxes, as well as the total Galactic extinction in a given locationin the sky.

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