Tie Liu, Yuefang Wu, Jingwen Wu, Sheng-Li Qin, Huawei Zhang
We present the results of high spatial resolution observations at 1.1 mm waveband, with the Submillimeter Array (SMA), towards the protocluster G10.6-0.4. The 1.1 mm continuum emission reveals seven dense cores, in which infall motions are all detected with the red-shifted absorption dips in HCN (3--2) line. This is the first time that infall is seen towards multiple sources in a protocluster. The dense core located in the center has the largest mass and mass infall rate and dominates the gas accretion of the protocluster, while the off-center cores have much smaller masses and mass infall rates, which favors the "competitive accretion" model. We also identified four infrared point sources in this region, which are most likely Class 0/I protostars. Two jet-like structures are also identified from Spitzer/IRAC image.
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http://arxiv.org/abs/1211.5206
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