Is the filamentary dark cloud GF 6 a star forming region? --- Stability analysis and infrared properties
Is the filamentary dark cloud GF 6 a star forming region? --- Stability analysis and infrared properties
复制标题
丝状暗云 GF 6 是恒星形成区域吗？
DOI：
10.1088/1674-4527/17/12/126
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发表时间：
2017
影响因子：
1.8
通讯作者：
Zhang B.
中科院分区：
文献类型：
--
作者：
Kim J.;Kim H.-G.;Kim S.~J.;Zhang B.
我们给出了对丝状暗云 GF 6 的测绘观测和稳定性分析的结果。我们研究了典型丝状暗云 GF 6 的内部结构，以了解丝状暗云是否会形成恒星。我们使用 12 CO (J= 1–0) 和 13 CO (J= 1–0) 发射线进行射电观测，以检查质量分布及其演化状态。 13 CO 气柱密度图显示了 GF 6 区域中的八个子团块，其尺寸为亚 PC 尺度。由此产生的所有子团块的局部热力学平衡质量太低，无法在湍流耗散下形成恒星。我们还研究了嵌入式红外点源的特性，以了解它们是否是新形成的恒星。红外特性还表明，这些点源与 GF 6 相关的恒星形成活动无关。射电和红外特性都表明，丝状暗云 GF 6 太轻，无法通过引力收缩，最终会消散。
We present the results of mapping observations and stability analyses toward the filamentary dark cloud GF 6. We investigate the internal structures of a typical filamentary dark cloud GF 6 to know whether the filamentary dark cloud will form stars. We perform radio observations with both 12 CO (J= 1–0) and 13 CO (J= 1–0) emission lines to examine the mass distribution and its evolutionary status. The 13 CO gas column density map shows eight subclumps in the GF 6 region with sizes on a sub-pc scale. The resulting local thermodynamic equilibrium masses of all the subclumps are too low to form stars against the turbulent dissipation. We also investigate the properties of embedded infrared point sources to know whether they are newly formed stars. The infrared properties also indicate that these point sources are not related to star forming activities associated with GF 6. Both radio and infrared properties indicate that the filamentary dark cloud GF 6 is too light to contract gravitationally and will eventually be dissipated away.