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Title:
Interstellar Alcohols
Authors:
Charnley, S. B.; Kress, M. E.; Tielens, A. G. G. M.; Millar, T. J.
Publication:
Astrophysical Journal v.448, p.232 (ApJ Homepage)
Publication Date:
07/1995
Origin:
APJ; KNUDSEN
Astronomy Keywords:
ISM: ABUNDANCES, ISM: CLOUDS, ISM: MOLECULES, MOLECULAR PROCESSES
DOI:
10.1086/175955
Bibliographic Code:
1995ApJ...448..232C

Abstract

We have investigated the gas-phase chemistry in dense cores where ice mantles containing ethanol and other alcohols have been evaporated. Model calculations show that methanol, ethanol, propanol, and butanol drive a chemistry leading to the formation of several large ethers and esters. Of these molecules, methyl ethyl ether (CH3OC2H5) and diethyl ether [(C2H5)2O] attain the highest abundances and should be present in detectable quantities within cores rich in ethanol and methanol. Gas-phase reactions act to destroy evaporated ethanol and a low observed abundance of gas-phase C2H5OH does not rule out a high solid-phase abundance. Grain surface formation mechanisms and other possible gas-phase reactions driven by alcohols are discussed, as are observing strategies for the detection of these large interstellar molecules.

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