Methane in oxygen-rich circumstellar envelopes: a search for CH_3OH and CCH

Details Methane in oxygen-rich circumstellar envelopes: a search for CH_3OH and CCH Methane in oxygen-rich circumstellar envelopes: a search for CH_3OH and CCH

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.287..538c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 287, Issue 3, pp. 538-542.

Astronomy and Astrophysics

Astronomy

8

Molecular Processes, Circumstellar Matter, Stars: Late-Type

Scientific paper

We have searched for rotational emission from CH_3OH and CCH molecules in several oxygen-rich circumstellar envelopes known to display HCN emission. We find no evidence for emission from either molecule. When compared with theoretical models, our upper limits on CH_3OH and CCH in IRC+10011, TX Cam and IK Tau appear to rule out the hypothesis that the unexpected presence of HCN and other carbon-bearing molecules in these outflows is due to a substantial abundance of methane.

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