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Molecular CO Outflows in the L1641-N Cluster: Kneading a Cloud Core

机译:L1641-N团簇中的分子CO流出:捏合云核

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We present results of 1.3 mm interferometric and single-dish observations of the center of the L1641-N cluster in Orion. Single-dish wide-field continuum and CO(2-1) observations reveal the presence of several molecular outflows driven by deeply embedded protostellar sources. At higher angular resolution, the dominant millimeter source in the cluster center is resolved into a pair of protostars (L1641-N MM1 and L1641-N MM3), each driving a collimated outflow, and a more extended, clumpy core. Low-velocity CO line-wing emission is spread widely over much of the cluster area. We detect and map the distribution of several other molecular transitions (13CO, C18O, 13CS, SO, CH3OH, CH3CN, and OCS). CH3CN and OCS may indicate the presence of a hot corino around L1641-N MM1. We tentatively identify a velocity gradient over L1641-N MM1 in CH3CN and OCS, oriented roughly perpendicular to the outflow direction, perhaps indicative of a circumstellar disk. An analysis of the energy and momentum load of the CO outflows, along with the notion that apparently a large volume fraction is affected by the multiple outflow activity, suggests that outflows from a population of low-mass stars might have a significant impact on clustered (and potentially high-mass) star formation.
机译:我们提出在Orion中L1641-N团簇中心的1.3毫米干涉和单碟观测结果。单碟宽视场连续体和CO(2-1)的观察揭示了深埋的原恒星源驱动的几种分子流出的存在。在较高的角分辨率下,群集中心的主导毫米源被分解为一对原恒星(L1641-N MM1和L1641-N MM3),每个原角都驱动准直的流出,并具有更扩展的块状芯。低速CO线-机翼排放物广泛散布在整个群集区域中。我们检测并绘制了其他几种分子跃迁的分布图(13CO,C18O,13CS,SO,CH3OH,CH3CN和OCS)。 CH3CN和OCS可能表明L1641-N MM1附近存在热Corino。我们初步确定了CH3CN和OCS中L1641-N MM1上的速度梯度,其方向大致垂直于流出方向,也许表明是星盘。对CO流出的能量和动量负荷进行分析,以及认为大量体积显然受多重流出活动影响的概念表明,低质量恒星群的流出可能会对聚类产生重大影响(以及潜在的高质量恒星形成。

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