Unveiling the Milky Way dust extinction curve in 3D

We measure the extinction curves of 220 million stars with Gaia XP spectra and near-infrared photometry from 2MASS and WISE. We use a data-driven model that is developed from Zhang et al. 2023, with variable extinction curves, to determine stellar parameters and extinction curves simultaneously. For full details of our method, see our corresponding paper*.

Here, we provide the resulting catalog of stellar parameters, our trained stellar model, and a few Python scripts that demonstrate how to interact with the catalog and model.

See the README.md for more information.

* Link of the paper will be posted here once available.

Update on 05.04.2024: Uploaded the reference table xi_Rv_ext_curve.h5,  which was missing. Updated the script plot_ext_curve.py for a larger range of R(V) .

Update on 17.05.2024: Uploaded preliminary maps in Rv_map_new.h5; Uploaded the script example_query.py for examples of querying the map, as well as code for generating sky-view and birds'-eye view pictures.