A survey of CH2DOH towards starless and pre-stellar cores in the Taurus molecular cloud
A survey of CH2DOH towards starless and pre-stellar cores in the Taurus molecular cloud
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对金牛座分子云中无星和前恒星核心的 CH2DOH 调查
DOI:
10.1093/mnras/staa3649
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发表时间:
2020
影响因子:
4.8
通讯作者:
Scibelli, Samantha
中科院分区:
文献类型:
--
作者:
Ambrose, Hannah E;Shirley, Yancy L;Scibelli, Samantha
Recent observations indicate that organic molecules are prevalent towards starless and pre-stellar cores. Deuteration of these molecules has not been well studied during the starless phase. Published observations of singly deuterated methanol, CH2DOH, have only been observed in a couple of well-studied, dense, and evolved pre-stellar cores (e.g. L1544, L183). Since the formation of gas-phase methanol during this cold phase is believed to occur via desorption from the icy grain surfaces, observations of CH2DOH may be useful as a probe of the deuterium fraction in the ice mantles of dust grains. We present a systematic survey of CH2DOH towards 12 starless and pre-stellar cores in the B10 region of the Taurus molecular cloud. Nine of the 12 cores are detected with [CH2DOH]/[CH3OH] ranging from <0.04 to 0.23with a median value of 0.11. Sources not detected tend to have larger virial parameters and larger methanol linewidths than detected sources. The results of this survey indicate that deuterium fractionation of organic molecules, such as methanol, during the starless phase may be more easily detectable than previously thought.
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DOI:
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发表时间:
2002
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