ASTE Submillimeter Observations of a Young Stellar Object Condensation in Cederblad 110
ASTE Submillimeter Observations of a Young Stellar Object Condensation in Cederblad 110
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DOI：
10.1086/519269
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
M. Hiramatsu;T. Hayakawa;K. Tatematsu;K. Kamegai;T. Onishi;A. Mizuno;N. Yamaguchi;T. Hasegawa
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文献类型：
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作者：
M. Hiramatsu;T. Hayakawa;K. Tatematsu;K. Kamegai;T. Onishi;A. Mizuno;N. Yamaguchi;T. Hasegawa
本文介绍了利用阿塔卡马亚毫米望远镜实验对变色龙1号黑云Cederblad 110区域的低质量年轻恒星天体（YSO）的亚毫米观测结果。我们的HCO+(J = 4-3)图显示了一个密度为~0.1 pc的致密分子气体，它是两个包层的复合体，与I类源Ced 110 IRS 4和IRS 11以及一个非常年轻的天体Cha-MMS 1有关。该区域的另外两个I类源IRS 6和NIR 89位于团簇之外，没有扩展的HCO+排放。计算得出MMS 1的HCO+丰度为2.6 × 10-10， IRS 4的HCO+丰度为3.4 × 10-9，与其他年轻源的报告值相当。在我们的12CO（J = 3-2）图中检测到IRS 4和IRS 6的双极流出。IRS 4的流出似乎与Cha-MMS 1发生了碰撞。尽管没有发现任何迹象表明已经发生了触发恒星形成的现象，但流出物的动量足以影响mms1中的气体运动。
We present results of submillimeter observations of a low-mass young stellar object (YSO) condensation in the Cederblad 110 region of the Chamaeleon I dark cloud with the Atacama Submillimeter Telescope Experiment. Our HCO+(J = 4-3) map reveals a dense molecular gas with an extent of ~0.1 pc, which is a complex of two envelopes associated with class I sources Ced 110 IRS 4 and IRS 11 and a very young object Cha-MMS 1. The other two class I sources in this region, IRS 6 and NIR 89, are located outside the clump and have no extended HCO+ emission. HCO+ abundance is calculated to be 2.6 × 10-10 for MMS 1 and 3.4 × 10-9 for IRS 4, which are comparable to the reported value for other young sources. Bipolar outflows from IRS 4 and IRS 6 are detected in our 12CO(J = 3-2) map. The outflow from IRS 4 seems to collide with Cha-MMS 1. The outflow has enough momentum to affect gas motion in MMS 1, although no sign has been detected to indicate that a triggered star formation has occurred.