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Fragmentation in molecular clouds
Published online by Cambridge University Press: 03 August 2017
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B209. Fragments are detected in the outer parts of the B209 molecular cloud in a region of density 1000 cm−3 using 12CO, 13CO, H2CO, IRAS 60 and 100 μm images, discernable as velocity components, and have characteristics: <Rfragment>∼ 0.4 pc; <Mfragment>∼ 2 M⊙; <MVRfragment>∼ 1.6 M⊙ km/s pc; Tgas ∼ 11 K; Tdust> ∼ 16 K??. The system of fragments has <separation>∼ 0.5 pc and <MVR>∼ 1.6 M⊙ km/s pc. These are illustrated in Figure 1, which contains an IRAS 100 μm map made with Geisha and attendant U. Köln Gornergrat CO spectra for each respective fragment. The differing characteristic velocities of each fragment are readily apparent.
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