FEDReD II : 3D Extinction Map with 2MASS and Gaia DR2 data

Abstract

Aims. We aim to map the 3D distribution of the interstellar extinction of the Milky Way disk up to distances larger than those probed with the Gaia parallax alone. Methods. We apply the FEDReD (Field Extinction-Distance Relation Deconvolver) algorithm to the 2MASS near-infrared photometry together with the Gaia DR2 astrometry and photometry. This algorithm uses a Bayesian deconvolution approach, based on an empirical HR-diagram representative of the local thin disk, in order to map the extinction as a function of distance of various fields of view. Results. We analysed more than 5.6 million stars to obtain an extinction map of the entire Galactic disk within $|b|<0.24^{\circ }$. This map provides information up to $5\mathrm{kpc}$ in the direction of the Galactic centre and at more than $7\mathrm{kpc}$ in the direction of the anticentre. This map reveals the complete shape of structures known locally, such as the Vela complex or the split of the local arm. Furthermore our extinction map shows many large "clean bubbles" especially one in the Sagittarius -- Carina complex, and four others which define a structure that we nickname the butterfly.

9 pages, 8 figures, 5 tables

References in corpus (13)

• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• The UKIDSS Galactic Plane Survey
• Physical properties of molecular clouds for the entire Milky Way disk
• Gaia-2MASS 3D maps of Galactic interstellar dust within 3 kpc
• The observed spiral structure of the Milky Way
• Three-dimensional mapping of the local interstellar medium with composite data
• A Galactic-scale gas wave in the Solar Neighborhood
• A 3D extinction map of the Northern Galactic Plane based on IPHAS photometry
• Mapping the Milky Way bulge at high resolution: the 3D dust extinction, CO, and X factor maps
• Empirical photometric calibration of the Gaia Red Clump: colours, effective temperature and absolute magnitude
• A three dimensional extinction map of the Galactic Anticentre from multi-band photometry
• The Galactic spiral structure as revealed by O- and early B-type stars
• FEDReD I: 3D extinction and stellar maps by Bayesian deconvolution

Cited by in corpus (1)

• FEDReD I: 3D extinction and stellar maps by Bayesian deconvolution