2 MASS宽场消光图：II。蛇夫座和狼疮云
2MASS wide field extinction maps: II. The Ophiuchus and the Lupus cloud complexe
摘要：
我们提出了一个约1,700平方度的区域，包括蛇夫座，狼疮和管道黑暗的复杂使用4200万颗恒星从两微米全天巡天（2 MASS）点源目录的灭绝地图。使用一个强大的和最佳的近红外方法来映射尘埃柱密度（Nicer，在Lombardi & Alves 2001中描述），使我们能够检测到消光低至A_K = 0.05 mag，具有2-sigma的意义，并且在我们的地图上仍然具有3 arcmin的分辨率。我们还提出了一种新的，统计上合理的方法来表征分子云中的小尺度不均匀性。最后，我们调查的云结构功能，并表明显着偏离湍流模型预测的结果进行观察。
英文摘要：
We present an extinction map of a ~1,700 deg sq region that encloses the Ophiuchus, the Lupus, and the Pipe dark complexes using 42 million stars from the Two Micron All Sky Survey (2MASS) point source catalog. The use of a robust and optimal near-infrared method to map dust column density (Nicer, described in Lombardi & Alves 2001) allow us to detect extinction as low as A_K = 0.05 mag with a 2-sigma significance, and still to have a resolution of 3 arcmin on our map. We also present a novel, statistically sound method to characterize the small-scale inhomogeneities in molecular clouds. Finally, we investigate the cloud structure function, and show that significant deviations from the results predicted by turbulent models are observed.
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