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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 Region. IV Interaction between the Outflow and the Dense Gas in the Cluster Forming Region of OMC-2 FIR 6
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Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 Region. IV Interaction between the Outflow and the Dense Gas in the Cluster Forming Region of OMC-2 FIR 6

机译：OMC-2 / 3区域的毫米波和亚毫米波观测。 IV OMC-2 FIR 6团簇形成区域中流出气体与浓密气体之间的相互作用

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摘要

We have conducted millimeter interferometric observations of the Orion Molecular Cloud-2 (OMC-2) FIR 6 region at an angular resolution of - 4"|-7" with the Nobeyama Millimeter Array (NMA). In the 3.3-mm continuum emission we detected dusty core counterparts of previously identified FIR sources (FIR 6a, 6b, 6c, and 6d), and moreover resolved FIR 6a into three dusty cores.' The size and mass of these cores are estimated to be 1100- 5900 AU and 0.19-5.5 M0, respectively. We found that in the ~(12)C01(-0)J emis ion =FIR 6b, 6c, and 6d eject molecular outflow, and that the FIR 6c outflow also exhibits at least two collimated jet-like components in SiO (J = 2-1) emission. At the tip of one of the SiO components there appears an abrupt increase in the SiO line width (～ 15 km s~(-1)w)here the thre,e resolved cores in FIR 6a sem to delineate the tip. These results imply presence of the interaction and a bowshock front between the FIR 6c molecular outflow and FIR 6a. If the interaction occurred after the formation of the FIR 6a cores, the influence of the FIR 6c outflow on the FIR 6a cores would be minimal, since the total gravitational force in the FIR 6a cores (1.0-7.7 x 1 0~(-4)M_yk⊙r~m(-1 ) s) i~s m(u-c1h l)arger than the outflow momentum flux (2.4 x 10~(-5) M_ ⊙km s~(-1))y-). On trhe o1~ther ha(nd, it is also posible thathe interaction caused the gravitational instability in FIR 6a, and triggered the fragmentation into three cores, since the separation among these cores (～ 2.0 x 10~5A～3.U0-)8 . i.Is4n ox en i1 t0h~er scamse, oFrIdRe r6 oaf c tohre sJ,eans length (with a mass of 0.18-1.6 M_⊙ and a density of 0.2-5.8 x 10~,c-)7 migmht be3 po~tentia(l formation sites of the next generation of cluster members.
机译：我们用Nobeyama毫米阵列（NMA）对Orion分子云2（OMC-2）FIR 6区域进行了毫米干涉测量，其角分辨率为-4“ | -7”。在3.3毫米的连续发射中，我们检测到先前确定的FIR源（FIR 6a，6b，6c和6d）的粉尘芯，并且将FIR 6a分解为三个粉尘芯。这些核心的大小和质量分别估计为1100-5900 AU和0.19-5.5 M0。我们发现在〜（12）C01（-0）J emis ion = FIR 6b，6c和6d中喷射出分子流出物，并且FIR 6c流出物在SiO中还表现出至少两个准直的喷射状成分（J = 2-1）发射。在其中一种SiO组分的尖端，SiO线宽突然增加（〜15 km s〜（-1）w），此处FIR 6a中有3个分辨出的岩心用来描绘尖端。这些结果暗示FIR 6c分子流出物和FIR 6a之间存在相互作用和弓形波前。如果相互作用在FIR 6a磁芯形成之后发生，则FIR 6c流出对FIR 6a磁芯的影响将最小，因为FIR 6a磁芯中的总重力（1.0-7.7 x 1 0〜（-4 M_yk⊙r〜m（-1）s）i〜sm（u-c1h l）大于流出动量通量（2.4 x 10〜（-5）M_ kmkm s〜（-1））y-）。此外，相互作用还可能引起FIR 6a的重力失稳，并引发碎裂为三个核，因为这些核之间的分离（〜2.0 x 10〜5A〜3.U0-） 8。i.Is4n oxen i1 t0h〜er scamse，oFrIdRe r6 oaf c tohre sJ，eans长度（质量为0.18-1.6M_⊙，密度为0.2-5.8 x 10〜，c-）7迁移下一代簇成员的帐篷形成场所。

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