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首页> 外文期刊>The Astrophysical journal >DUST PROPERTIES OF LOCAL DUST-OBSCURED GALAXIES WITH THE SUBMILLIMETER ARRAY
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DUST PROPERTIES OF LOCAL DUST-OBSCURED GALAXIES WITH THE SUBMILLIMETER ARRAY

机译:带有撒粉盘阵列的局部尘埃模糊星系的尘埃特性

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摘要

We report Submillimeter Array observations of the 880 μm dust continuum emission for four dust-obscured galaxies (DOGs) in the local universe. Two DOGs are clearly detected with S ν(880 μm) =10-13?mJy and S/N 5, but the other two are not detected with 3σ upper limits of S ν(880 μm) =5-9?mJy. Including an additional two local DOGs with submillimeter data from the literature, we determine the dust masses and temperatures for six local DOGs. The infrared luminosities and dust masses for these DOGs are in the ranges of 1.2-4.9 × 1011(L ☉) and 4-14 × 107(M ☉), respectively. The dust temperatures derived from a two-component modified blackbody function are 23-26?K and 60-124?K for the cold and warm dust components, respectively. Comparison of local DOGs with other infrared luminous galaxies with submillimeter detections shows that the dust temperatures and masses do not differ significantly among these objects. Thus, as argued previously, local DOGs are not a distinctive population among dusty galaxies, but simply represent the high-end tail of the dust obscuration distribution.
机译:我们报告了局部宇宙中四个尘埃模糊星系(DOG)的880μm尘埃连续体发射的亚毫米波阵列观测结果。 Sν(880μm)= 10-13?mJy且S / N> 5时,清楚地检测到两个DOG,而Sν(880μm)= 5-9?mJy的3σ上限未检测到另外两个。包括另外两个带有文献中亚毫米波数据的本地DOG,我们确定了六个本地DOG的粉尘质量和温度。这些DOG的红外光度和粉尘质量分别在1.2-4.9×1011(L☉)和4-14×107(M☉)的范围内。由两组分修正黑体函数得出的粉尘温度,冷和热粉尘组分分别为23-26?K和60-124?K。通过亚毫米级检测比较本地DOG与其他红外发光星系表明,这些物体之间的粉尘温度和质量没有显着差异。因此,如前所述,本地DOG在尘土飞扬的星系中并不是独特的种群,而仅代表尘埃模糊分布的高端。

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