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- W2109700480 abstract "We present high resolution (R~50,000) spectroastrometry over the CO 1st overtone bandhead of a sample of seven intermediate/massive young stellar objects. These are primarily drawn from the red MSX source (RMS) survey, a systematic search for young massive stars which has returned a large, well selected sample of such objects. The mean luminosity of the sample is approximately 5 times 10^4 L_odot, indicating the objects typically have a mass of ~15 solar masses. We fit the observed bandhead profiles with a model of a circumstellar disc, and find good agreement between the models and observations for all but one object. We compare the high angular precision (0.2-0.8 mas) spectroastrometric data to the spatial distribution of the emitting material in the best-fitting models. No spatial signatures of discs are detected, which is entirely consistent with the properties of the best-fitting models. Therefore, the observations suggest that the CO bandhead emission of massive young stellar objects originates in small-scale disks, in agreement with previous work. This provides further evidence that massive stars form via disc accretion, as suggested by recent simulations." @default.
- W2109700480 created "2016-06-24" @default.
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- W2109700480 date "2010-08-18" @default.
- W2109700480 modified "2023-10-09" @default.
- W2109700480 title "Probing discs around massive young stellar objects with CO first overtone emission★†" @default.
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- W2109700480 doi "https://doi.org/10.1111/j.1365-2966.2010.17250.x" @default.
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