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arXiv 1011.0932astro-ph.GA
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Bolocam银道面巡天IV:在银道中心区域1.1和0.35毫米尘埃连续体发射

The Bolocam Galactic Plane Survey IV: 1.1 and 0.35 mm Dust Continuum Emission in the Galactic Center Region

John Bally, James Aguirre, Cara Battersby, Eric Todd Bradley, Claudia Cyganowski, Darren Dowell, Meredith Drosback, Miranda K Dunham, Neal J. Evans, Adam Ginsbu… 展开作者

John Bally, James Aguirre, Cara Battersby, Eric Todd Bradley, Claudia Cyganowski, Darren Dowell, Meredith Drosback, Miranda K Dunham, Neal J. Evans, Adam Ginsburg, Jason Glenn, Paul Harvey, Elisabeth Mills, Manuel Merello, Erik Rosolowsky, Wayne Schlingman, Yancy L. Shirley, Guy S. Stringfellow, Josh Walawender, Jonathan Williams

摘要:

分析了包含银河系中心的银河系平面六平方度区域的Bolocam银河系平面巡天(BGPS)数据,并与红外和无线电连续数据进行了比较。BGPS的1.1毫米发射由一个网络的周围的空腔,其中一些是充满了弥漫的近红外发射表明存在温暖的尘埃或无线电连续特性的HII地区或超新星遗迹周围的暗丝互连的团块。给出了两个最亮区域Sgr A和B的新的350 μm环境图像。Sgr B2是中央分子带中最明亮的毫米发射团,可能是银河系中最接近超级星团的类似物。中央分子区(CMZ)包含银河系中最高浓度的毫米和亚毫米发射致密团块。在斯皮策太空望远镜观测到的3.6至24 μm背景下,大多数1.1 mm的正向散射特征都是以剪影的形式出现的。然而,在吸收中只看到了几个负经度的团块,证实了CMZ中的正经度团块倾向于位于银河系中心的近侧的假设,这与我们银河系中央棒的怀疑方向一致。在8 μm的辐射中可以看到一些1.1 mm的云面,可能是由于多环芳烃(PAHs)。一个直径约为0.2 \degree(约30 pc)的空腔和介于1 \approx 0.0 \degree和0.2 \degree之间的红外泡围绕着拱和五重团簇以及Sgr A。气泡包含几个cluerous尘埃丝,指向Sgr A \ast,其潜在的作用,在他们的形成进行了探讨。[摘要截短]

英文摘要:

The Bolocam Galactic Plane Survey (BGPS) data for a six square degree region of the Galactic plane containing the Galactic center is analyzed and compared to infrared and radio continuum data. The BGPS 1.1 mm emission consists of clumps interconnected by a network of fainter filaments surrounding cavities, a few of which are filled with diffuse near-IR emission indicating the presence of warm dust or with radio continuum characteristic of HII regions or supernova remnants. New 350 μm images of the environments of the two brightest regions, Sgr A and B, are presented. Sgr B2 is the brightest mm-emitting clump in the Central Molecular Zone and may be forming the closest analog to a super star cluster in the Galaxy. The Central Molecular Zone (CMZ) contains the highest concentration of mm and sub-mm emitting dense clumps in the Galaxy. Most 1.1 mm features at positive longitudes are seen in silhouette against the 3.6 to 24 μm background observed by the Spitzer Space Telescope. However, only a few clumps at negative longitudes are seen in absorption, confirming the hypothesis that positive longitude clumps in the CMZ tend to be on the near-side of the Galactic center, consistent with the suspected orientation of the central bar in our Galaxy. Some 1.1 mm cloud surfaces are seen in emission at 8 μm, presumably due to polycyclic aromatic hydrocarbons (PAHs). A ~0.2\degree (~30 pc) diameter cavity and infrared bubble between l \approx 0.0\degree and 0.2\degree surrounds the Arches and Quintuplet clusters and Sgr A. The bubble contains several clumpy dust filaments that point toward Sgr A\ast; its potential role in their formation is explored. [abstract truncated]

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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