Ethylene in the circumstellar envelope of IRC+10216

Ethylene in the circumstellar envelope of IRC+10216

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 lin...

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Veröffentlicht in:Proceedings of the International Astronomical Union 2008-02, Vol.4 (S251), p.161-162
Hauptverfasser: Hinkle, K. H., Wallace, L., Richter, M. J., Cernicharo, J.
Format: Artikel
Sprache:eng
Schlagworte:
Astrophysics
Carbon
Contributed Papers
Spectrum analysis
Stars & galaxies
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Zusammenfassung: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.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921308021443