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Title:
Ethylene in IRC +10216
Authors:
Betz, A. L.
Affiliation:
AA(California, University, Berkeley, Calif.)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 244, Mar. 1, 1981, p. L103-L105. (ApJL Homepage)
Publication Date:
03/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Ethylene, Interstellar Gas, Stellar Envelopes, Stellar Spectra, Supergiant Stars, Abundance, Laser Spectroscopy, Molecular Rotation, Vibrational Spectra
DOI:
10.1086/183490
Bibliographic Code:
1981ApJ...244L.103B

Abstract

Ethylene has been detected in the circumstellar gas surrounding the supergiant star IRC +10216. Two lines of the nu7 vibration-rotation band near 28 THz (949/cm) have been seen in absorption at an expansion velocity of 14 km/sec relative to the central star. The line intensities indicate a rotational temperature of T greater than 400 K and a radial C2H4 column density of 10 to the 16th to 10 to the 17th per sq cm.

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