DEUTERATED METHANOL IN LOW-MASS PROTOSTARS
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Date
2003
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
In the last five years, deuterated species have been observed to be very abundant in low-mass protostars envelopes. Recent laboratory studies of deuterated isotopomers of methanol provided astronomers with the frequencies and line strengths, allowing us to observe these species in astronomical sources. Doubly-deuterated methanol was first detected towards the low-mass protostar $IRAS16293-2422$, with a fractionation $CHD_{2}OH/CH_{3}OH$ of $0.2$. Subsequent observations showed that methanol is similarly deuterated in other low-mass protostars. These observations bring a very constraining tool to understand the processes leading to molecular deuteration in protostellar envelopes. Ongoing observations of other deuterated isotopomers of methanol will also be discussed in this talk.
Description
Author Institution: Centre d'Etude Spatiale des Rayonnements; Department of Physics, The Ohio State University; Department of Physics, LAOG; Department of Physics, CESR; Department of Physics, Observatoire de Bordeaux; College of Natural Sciences, Dakota State University; College of Natural Sciences, LERMA \& FRE 2460 du CNRS, Observatoire de Paris; Instituto de Astronomia, UNAM