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Ethylene in the circumstellar envelope of IRC+10216

Published online by Cambridge University Press:  01 February 2008

K. H. Hinkle
Affiliation:
National Optical Astronomy ObservatoryP.O. Box 26732, Tucson, Arizona 85726, U.S.A. email: [email protected]; [email protected]
L. Wallace
Affiliation:
National Optical Astronomy ObservatoryP.O. Box 26732, Tucson, Arizona 85726, U.S.A. email: [email protected]; [email protected]
M. J. Richter
Affiliation:
University of California at DavisPhysics Department, 1 Shields Avenue, Davis, CA 95616, U.S.A. email: [email protected]
J. Cernicharo
Affiliation:
Departamento de Astrofísica Molecular e InfrarrojaInstituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid, Spain email: [email protected]
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Abstract

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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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008

References

Betz, A. L. 1981, ApJ, 244, L103CrossRefGoogle Scholar
Fonfría, J. P., Cernicharo, J., Richter, M. J., & Lacy, J. H. 2008, ApJ, 673, 445CrossRefGoogle Scholar
Goldhaber, D. M., Betz, A. L., & Ottusch, J. J. 1987, ApJ, 314, 356CrossRefGoogle Scholar
Keady, J. J., Hall, D. N. B., & Ridgway, S. T. 1988, ApJ, 326, 832CrossRefGoogle Scholar
Lacy, J. H., Richter, M. J., Greathouse, T. K., Jaffe, D. T., & Zhu, Q. 2002, PASP, 114, 153Google Scholar
Olofsson, H. 2005, in: Wilson, A. (ed.), Proceedings of the Dusty and Molecular Universe: a Prelude to Herschel and ALMA, ESA SP-577, (Noordwijk: ESA), p. 223Google Scholar