On the Detection of Ethene toward CW Leonis
A. L. Betz
reported on
Ethylene in IRC +10216
Astrophys. J. 244, L103–L105 (1981).
Ethene, aka ethylene, was identified through two transitions (110 – 000 and 515 – 505) of the v7 out-of-plane infrared band near 949 cm−1 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
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 v7 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 H2 around 10−8.
Contributor(s): H. S. P. Müller; 10, 2025