The catalogues and mid-infrared environment of Interstellar OH Masers
The catalogues and mid-infrared environment of Interstellar OH Masers
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DOI：
10.1093/mnras/stu776
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发表时间：
2014-04
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影响因子：
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通讯作者：
H. Qiao;Juan Li;Zhiqiang Shen;Xi Chen;Xing-wu Zheng
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文献类型：
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作者：
H. Qiao;Juan Li;Zhiqiang Shen;Xi Chen;Xing-wu Zheng
一些 OH 脉泽线的数据已通过调查收集。这些位置与最近的中红外（MIR）调查（例如 Spitzer-GLIMPSE 和 WISE）进行了比较，限制了与点源的比较。比较红外源的颜色和强度。 18 cm OH 脉泽有很多，但由较高能级产生的谱线要少得多。我们还与 5 cm II 类甲醇微波激射器进行了比较。我们将结果分为 3 个子样本：仅与 OH 脉泽相关的子样本、与 OH 脉泽和 II 类甲醇脉泽相关的子样本以及仅与 II 类甲醇脉泽相关的子样本。 GLIMPSE 点源的颜色-颜色或颜色-幅度结果没有明显差异。然而，根据 WISE 22 {\mu}m 调查的结果，与 OH 脉塞相关的源比与甲醇脉塞相关的源更亮。我们认为 OH 和甲醇脉泽的存在标志着恒星形成区域的位置。 OH 脉泽位于红外中发现的尖锐特征的边缘。这些被称为气泡。如果 OH 脉泽标记了原恒星的位置，那么结果就为气泡膨胀引发的恒星形成提供了间接证据。
Data for a number of OH maser lines have been collected from surveys. The posi- tions are compared to recent mid-infrared (MIR) surveys such as Spitzer-GLIMPSE and WISE, restricting the comparison to point sources. The colors and intensities of the IR sources are compared. There are many 18 cm OH masers, but far fewer in lines arising from higher energy levels. We also make a comparison with the 5 cm Class II methanol masers. We have divided the results into 3 subsamples: those associated with OH masers only, those associated with OH masers and Class II methanol masers, and those only associated with Class II methanol masers. There are no obvious dif- ferences in the color-color or color-magnitude results for the GLIMPSE point sources. However, according to the results from the WISE 22 {\mu}m survey, the sources associ- ated with OH masers are brighter than those associated with methanol masers. We interpret the presence of OH and methanol masers mark the locations of regions where stars are forming. The OH masers are located on the borders of sharp features found in the IR. These are referred to as bubbles. If the OH masers mark the positions of protostars, the result provides indirect evidence for triggered star formation caused by the expansion of the bubbles.