A Three-Dimensional Map of Milky Way Dust

July 9, 2015

Fig. 4. Median differential reddening in two Solar-centric distance ranges [from G. Green, et al., "A Three-Dimensional Map of Milky Way Dust," arXiv:1507.01005v1].

Astronomy graduate student Gregory Green, Ph.D. '12 Edward Schlafly, Prof. Douglas Finkbeiner, and colleagues from Max-Planck-Institut für Astronomie (Heidelberg), Université de Strasbourg, GMTO Corporation, University of Durham, University of Hawaii at Manoa, and Princeton University Observatory, published a 3D map of interstellar dust reddening. Using 800 million stars with Pan-STARRS 1 photometry, and matched 2MASS photometry for 200 million stars, the map traces dust reddening in three dimensions across three-quarters of the sky. A detailed discussion of the map will be published in The Astrophysical Journal, a draft version is available on arXiv.