Large–scale and high–sensitivity multi–line CO surveys toward the Galactic center
Large–scale and high–sensitivity multi–line CO surveys toward the Galactic center
复制标题
对银河系中心进行大规模、高灵敏度多线二氧化碳勘测
DOI：
10.1017/s1743921314000544
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Y. Fukui
中科院分区：
文献类型：
--
作者：
R. Enokiya;K. Torii;M. Schultheis;Y. Asahina;R. Matsumoto;H. Yamamoto;K. Tachihara;T. Okuda;M. Morris;Y. Fukui
摘要我们利用NANTEN4M望远镜对银河系中心分子带(CMZ)进行了大规模(4×2度)CO多线观测，绘制了位于银河系纬度较高0°以上的几个弥散分子特征图。根据形态特征，这些高纬度特征由弥散的分子晕气和分子细丝组成。它们在12co J=(2−1)和J=(1−0)之间的高速度和高强度比清楚地表明了它们在GC中的位置，它们的总质量相当于∼的10%。我们讨论了磁场是这些高纬度分子特征上升到银河系高纬度的可能机制。
Abstract We carried out large–scale (4 × 2 degree) CO multi–line observations toward the central molecular zone (CMZ) in the Galactic center (GC) with the NANTEN2 4m telescope and mapped several diffuse molecular features located at relatively high Galactic latitudes above 0°.6. These high–latitude features are composed of diffuse molecular halo gas and molecular filaments according to their morphological aspects. Their high velocities and high intensity ratios between 12CO J = (2−1) and J = (1−0) clearly indicate their location in the GC, and their total mass amount to ∼10% of that of the CMZ. We discuss that magnetic field is a possible mechanism of these high–latitude molecular features lifting up toward high galactic latitude.