Ethylene in the circumstellar envelope of IRC+10216

Details Ethylene in the circumstellar envelope of IRC+10216 Ethylene in the circumstellar envelope of IRC+10216

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..251..161h&link_type=abstract

Organic Matter in Space, Proceedings of the International Astronomical Union, IAU Symposium, Volume 251, p. 161-162

Astronomy and Astrophysics

Astronomy

Techniques: Spectroscopic, Stars: Carbon, Circumstellar Matter, Ism: Molecules, Infrared: Stars

Scientific paper

Ethylene (C2H4) is a symmetric molecule that is best detected using mid-infrared transitions. We report on observations of the 10.5 μm ν7 band using the cryogenic grating spectrograph TEXES. These confirm the previous ethylene detection in the IRC+10216 circumstellar shell. We detect 18 ethylene lines. The lines are both narrow and weak with depths of no more than ~2%. The ethylene lines suggest an excitation temperature of ~80 K.

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