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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 730230.0, MPI für Astronomie / Publikationen_mpia
A three-dimensional map of Milky Way dust
Authors:Green, G. M.; Schlafly, E. F.; Finkbeiner, D. P.; Rix, H.-W.; Martin, N.; Burgett, W.; Draper, P. W.; Flewelling, H.; Hodapp, K.; Kaiser, N.; Kudritzki, R. P.; Magnier, E.; Metcalfe, N.; Price, P.; Tonry, J.; Wainscoat, R.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:The Astrophysical Journal
Volume:810
Issue / Number:1
Start Page:id. 25 (23 pp)
Audience:Not Specified
Abstract / Description:We present a three-dimensional map of interstellar dust reddening, covering three-quarters of the sky out to a distance of several kiloparsecs, based on Pan-STARRS 1 (PS1) and 2MASS photometry. The map reveals a wealth of detailed structure, from filaments to large cloud complexes. The map has a hybrid angular resolution, with most of the map at an angular resolution of 3\buildrel{ \prime}\over{.} 4–13\buildrel{ \prime}\over{.} 7, and a maximum distance resolution of ∼ 25%. The three-dimensional distribution of dust is determined in a fully probabilistic framework, yielding the uncertainty in the reddening distribution along each line of sight, as well as stellar distances, reddenings, and classifications for 800 million stars detected by PS1. We demonstrate the consistency of our reddening estimates with those of two-dimensional emission-based maps of dust reddening. In particular, we find agreement with the Planck {τ }353{GHz}-based reddening map to within 0.05 {mag} in E(B-V) to a depth of 0.5 {mag}, and explore systematics at reddenings less than E(B-V)≈ 0.08 {mag}. We validate our per-star reddening estimates by comparison with reddening estimates for stars with both Sloan Digital Sky Survey photometry and Sloan Extension for Galactic Understanding and Exploration spectral classifications, finding per-star agreement to within 0.1 {mag} out to a stellar E(B-V) of 1 mag. We compare our map to two existing three-dimensional dust maps, by Marshall et al. and Lallement et al., demonstrating our finer angular resolution, and better distance resolution compared to the former within ∼ 3 {kpc}. The map can be queried or downloaded at <A href="http://argonaut.skymaps.info">http://argonaut.skymaps.info</A>. We expect the three-dimensional reddening map presented here to find a wide range of uses, among them correcting for reddening and extinction for objects embedded in the plane of the Galaxy, studies of Galactic structure, calibration of future emission-based dust maps, and determining distances to objects of known reddening.
Free Keywords:dust; extinction; Galaxy: structure; methods: statistical
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X
URL:http://cdsads.u-strasbg.fr/abs/2015ApJ...810...25G
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