The structure of molecular gas associated with NGC 2264: wide-field 12CO and H2 imaging Wide-field imaging of NGC 2264
The structure of molecular gas associated with NGC 2264: wide-field 12CO and H2 imaging Wide-field imaging of NGC 2264
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与 NGC 2264 相关的分子气体结构：宽视场 12CO 和 H2 成像 NGC 2264 的宽视场成像
DOI：
10.1111/j.1365-2966.2012.20941.x
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发表时间：
2012
影响因子：
4.8
通讯作者：
Buckle J
中科院分区：
文献类型：
--
作者：
Buckle J
我们对NGC 2264的12 CO 3 → 2和H21-0 S（1）进行了宽视场、高分辨率的成像观测。我们确定了46个H2发射天体，其中35个是新发现的。我们的特点是几个核心的原恒星，减少了以前观察到的比例的前恒星/原恒星核心的NGC 2264集群。H2喷流的长度增加了以前报道的集群的空间范围。在每个集群中，<0.5 per cent of cloud material has been perturbed by outflow activity. A principal component analysis of the12CO data suggests that turbulence is driven on scales >2.6pc，这比流出的范围更大。我们得到的指数α= 0.74的尺寸线宽的关系，可能是由于高的表面密度的NGC 2264。在这个非常活跃的混合质量恒星形成区域，我们的观察表明，原恒星外流活动并没有注入足够大规模的能量和动量，成为湍流的主要来源。
We present wide-field, high-resolution imaging observations in12CO 3 → 2 and H21–0 S(1) towards a ∼1 deg2region of NGC 2264. We identify 46 H2emission objects, of which 35 are new discoveries. We characterize several cores as protostellar, reducing the previously observed ratio of pre-stellar/protostellar cores in the NGC 2264 clusters. The length of H2jets increases the previously reported spatial extent of the clusters. In each cluster, <0.5 per cent of cloud material has been perturbed by outflow activity. A principal component analysis of the12CO data suggests that turbulence is driven on scales >2.6 pc, which is larger than the extent of the outflows. We obtain an exponent α= 0.74 for the size–linewidth relation, possibly due to the high surface density of NGC 2264. In this very active, mixed-mass star-forming region, our observations suggest that protostellar outflow activity is not injecting energy and momentum on a large enough scale to be the dominant source of turbulence.