对GLIMPSE扩展绿天体（EGO）的1 mm谱线测量
A 1-mm spectral line survey toward GLIMPSE Extended Green Objects (EGOs)
摘要：
89斯皮策GLIMPSE扩展的绿色物体（EGO），候选大质量的年轻恒星的对象，北部子样本进行调查的分子线在两个1 GHz的范围：251.5- 252.5和260.188-261.188 GHz。一个全面的目录观察到的分子线数据和光谱图。毫无疑问，检测到八种分子物种：H13 CO+，SiO，SO，CH 3OH，CH 3 OCH 3，CH 3CH 2CN，HCOOCH 3和HN 13 C。在70个EGO中检测到H13 CO + 3-2线，其中37个还显示SiO 6-5线，表明它们与致密气体有关，支持扩展的4.5um过量排放的外流解释。我们的主要致密气体和外流示踪剂（H_（13）CO ~+，SiO，SO和CH_3OH）与我们以前的调查13 CO，12 CO和C_（18）O 1-0对同一样品的EGO的线宽和光度相关的多线多云分析。良好的对数线性相关性被发现在所有考虑的线光度，这需要一个普遍的相似性的密度和热结构，并可能在所有EGO云的冲击性能来解释。它还要求冲击应该在EGO的出生云中产生。不同程度的相关性被发现之间的线宽。然而，线宽度和光度的相关性往往逐渐恶化越大的云的子组件的大小尺度，描绘云的子组件大小的随机性增加。此外，三条CO 1-0同位素谱线之间的谱线宽度相关性表明，谱线宽度与数据离散度呈线性关系，表明速度的随机性随云的整体尺寸增大而增大，并具有一定的规律性。
英文摘要：
A northern subsample of 89 Spitzer GLIMPSE extended green objects (EGOs), the candidate massive young stellar objects, are surveyed for molecular lines in two 1-GHz ranges: 251.5- 252.5 and 260.188-261.188 GHz. A comprehensive catalog of observed molecular line data and spectral plots are presented. Eight molecular species are undoubtedly detected: H13CO+, SiO, SO, CH3OH, CH3OCH3, CH3CH2CN, HCOOCH3, and HN13C. H13CO+ 3-2 line is detected in 70 EGOs among which 37 ones also show SiO 6-5 line, demonstrating their association to dense gas and supporting the outflow interpretation of the extended 4.5 um excess emission. Our major dense gas and outflow tracers (H13CO+, SiO, SO and CH3OH) are combined with our previous survey of 13CO, 12CO and C18O 1-0 toward the same sample of EGOs for a multi-line multi- cloud analysis of line width and luminosity correlations. Good log-linear correlations are found among all considered line luminosities, which requires a universal similarity of density and thermal structures and probably of shock properties among all EGO clouds to explain. It also requires that the shocks should be produced within the natal clouds of the EGOs. Diverse degrees of correlation are found among the line widths. However, both the line width and luminosity correlations tend to progressively worsen across larger cloud subcomponent size-scales, depicting the increase of randomness across cloud subcomponent sizes. Moreover, the line width correlations among the three isotopic CO 1-0 lines show data scatter as linear functions of the line width itself, indicating that the velocity randomness also increases with whole-cloud sizes and has some regularity behind.
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