Compact Molecular Outflow from NGC2264 CMM3 : A Candidate for Very Young High-Mass Protostar
Compact Molecular Outflow from NGC2264 CMM3 : A Candidate for Very Young High-Mass Protostar
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NGC2264 CMM3 的致密分子流出：非常年轻的高质量原恒星的候选者
DOI：
10.1088/0004-637x/729/2/147
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
and S. Yamamoto
中科院分区：
文献类型：
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作者：
O. Saruwatari;N. Sakai;S.-Y. Liu;Y.-N. Su;T. Sakai;and S. Yamamoto
我们使用亚毫米阵列对 CO (J= 2–1) 和 CH 3 OH (J K= 5 K–4 K, K= 0, 3) 谱线流向高质量原恒星候选者 NGC 2264 CMM3 的分子流出进行了高分辨率观测。在 CO 和 CH 3 OH 排放中发现了与 CMM3 相关的 10 英寸大小的紧凑南北双极流出。流出动力年龄估计为 140-2000 年。再加上斯皮策太空望远镜未检测到任何 24 μm 源，结果表明 CMM3 可能拥有一颗处于早期演化阶段的年轻大质量恒星。 CH 3 OH流出波瓣稍微偏移到CO流出波瓣之外，这表明流出波与稠密环境气体之间的相互作用引起了CO峰值位置周围的激波，并且从颗粒地幔蒸发的CH 3 OH分子被从激波锋面扫走。检测到 CH 3 OH (K= 3) 的高激发线表明，南侧（红色）叶的相互作用特别强。流出似乎显着影响了 CMM3 的化学成分。
We have conducted a high-resolution observation of the molecular outflow with the CO (J= 2–1) and CH 3 OH (J K= 5 K–4 K, K= 0, 3) lines toward a high-mass protostar candidate, NGC 2264 CMM3, using the Submillimeter Array. A compact north–south bipolar outflow of 10''in size associated with CMM3 is found in both CO and CH 3 OH emission. The outflow dynamical age is estimated to be as young as 140–2000 yr. Together with the non-detection of any 24 μm source with the Spitzer Space Telescope, the result suggests that CMM3 likely harbors a young massive star at its very early evolutionary stage. The CH 3 OH outflow lobes are slightly offset outside those of the CO outflow, which indicates that the interaction between the outflow and the dense ambient gas causes a shock around the CO peak position, and the CH 3 OH molecule evaporated from the grain mantles is swept away from the shock front. The interaction is particularly strong in the southern (red) lobe, as indicated by the detection of the high excitation line of CH 3 OH (K= 3). The outflow seems to affect the chemical composition of CMM3 significantly.