Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Competitive accretion in the protocluster G10.6-0.4?   We present the results of high spatial resolution observations at 1.1 mm
waveband, with the Submillimetre Array (SMA), towards the protocluster
G10.6-0.4. The 1.1 mm continuum emission reveals seven dense cores, towards
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. 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. The dense core located
in the centre has much larger mass than the off-centre cores. The clump is in
overall collapse and the infall motion is supersonic. The standard deviation of
core velocities and the velocity differences between the cores and the
cloud/clump are all larger than the thermal velocity dispersion. The picture of
G10.6-0.4 seems to favor the "competitive accretion" model but needs to be
tested by further observations.

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The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
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The categories of this paper are: cond-mat
3
The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga