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Laboratory Spectroscopy and Herschel and APEX Observations of Light Hydride Species

Published online by Cambridge University Press:  25 November 2011

H.S.P. Müller
Affiliation:
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, Germany. e-mail: hspm@ph1.uni-koeln.de ;
C.P. Endres
Affiliation:
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, Germany. e-mail: hspm@ph1.uni-koeln.de ;
J. Stutzki
Affiliation:
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, Germany. e-mail: hspm@ph1.uni-koeln.de ;
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Abstract

Observations of CH+, J = 1 − 0 and 2 − 1 near 0.835 and 1.67 THz with Herschel/HIFI and of 13CH+, J = 1 − 0 near 0.830 THz with APEX revealed their rest frequencies to be higher than the accepted values by 21 and 30 km s-1, respectively. Very recent laboratory measurements of the J = 1 − 0 transition frequencies of CH+, 13CH+ and CD+ and fits to these as well as electronic spectral data resolved the descrepancies. The laboratory spectroscopic situation will be reviewed for selected cationic light hydride species.

Type
Research Article
Copyright
© EAS, EDP Sciences 2011

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