A THREE-DIMENSIONAL MAP OF MILKY WAY DUST
A THREE-DIMENSIONAL MAP OF MILKY WAY DUST
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DOI：
10.1088/0004-637x/810/1/25
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发表时间：
2015-07
期刊：
影响因子：
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通讯作者：
G. Green;E. Schlafly;D. Finkbeiner;H. Rix;N. Martin;W. Burgett;P. Draper;H. Flewelling;K. Hoda
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文献类型：
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作者：
G. Green;E. Schlafly;D. Finkbeiner;H. Rix;N. Martin;W. Burgett;P. Draper;H. Flewelling;K. Hoda
我们提出了一个星际尘埃变红的三维地图，覆盖了四分之三的天空，距离几千秒差距，基于泛星1（PS1）和2 MASS测光。这张地图揭示了丰富的详细结构，从细丝到大型云复合体。地图具有混合角分辨率，地图的大部分角分辨率为3 4？> - 13 7？>，最大距离分辨率为25%？> .尘埃的三维分布是在一个完全概率的框架中确定的，产生了沿沿着每条视线的红化分布的不确定性，以及PS1探测到的8亿颗恒星的恒星距离、红化和分类。我们证明了我们的红化估计的一致性与二维排放为基础的地图的尘埃红化。特别是，我们发现协议与普朗克τ 353 GHz？> - 基于红化地图在0.05 mag？>在E（B - V）中？>深度为0.5磁？>在E（B - V）<0.08 mag？.我们通过与斯隆数字巡天光度测量和斯隆银河系理解和探索光谱分类扩展的恒星红化估计进行比较，验证了我们的每星红化估计，发现每星一致性在0.1等？>到恒星E（B - V）？>我们将我们的地图与马歇尔等人和Lallement等人的两个现有的三维尘埃地图进行比较，展示了我们更精细的角分辨率，和更好的距离分辨率相比，前者在103 kpc？> .该地图可以在http://argonaut.skymaps.info上查询或下载。我们期望这里提出的三维红化图能找到广泛的用途，其中包括校正嵌入银河系平面的物体的红化和消光，研究银河系结构，校准未来基于排放的尘埃图，以及确定已知红化物体的距离。
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 4 ?> – 13 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 http://argonaut.skymaps.info. 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.