Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ===== On the Detection of Ethene toward CW Leonis ===== A. L. Betz\\ reported on\\ **[[https://doi.org/10.1086/183490|Ethylene in IRC +10216]]**\\ //Astrophys. J.// **244**, L103–L105 (1981).\\ Ethene, aka ethylene, was identified through two transitions (1<sub>10</sub> – 0<sub>00</sub> and 5<sub>15</sub> – 5<sub>05</sub>) of the //v//<sub>7</sub> out-of-plane infrared band near 949 cm<sup>−1</sup> observed in absorption with the 1.5 m McMath Solar Telescope of the Kitt Peak National Observatory toward the C-rich AGB star CW Leonis. A rotational temperature greater than 400 K was inferred.\\ \\ J. P. Fonfría, K. H. Hinkle, J. Cernicharo, M. J. Richter, M. Agúndez, and L. Wallace\\ investigated\\ **[[https://doi.org/10.3847/1538-4357/835/2/196|The Abundance of C2H4 in the Circumstellar Envelope of IRC+10216]]**\\ //Astrophys. J. Lett.// **980**, Art. No. L13 (2025).\\ The Texas Echelon Cross Echelle Spectrograph (TEXES) at the NASA Infrared Telescope Facility (IRTF) was employed to observe 80 transitions of the //v//<sub>7</sub> band with //J// up to about 30 toward CW Leonis. About 1/3 of the lines are unblended with rotational temperatures of about 105 and 400 K and the fractional abundance with respect to H<sub>2</sub> around 10<sup>−8</sup>.\\ \\ ---- Contributor(s): H. S. P. Müller; 10, 2025 ---- molecules/ism/c2h4.txt Last modified: 2025/10/29 11:45by mueller