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A new short-wavelength carbon dioxide band in the spectrum of Venus

Published online by Cambridge University Press:  14 August 2015

T. Owen
Affiliation:
IIT Research Institute, Chicago, Ill., U.S.A.
H. P. Mason
Affiliation:
IIT Research Institute, Chicago, Ill., U.S.A.

Extract

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In attempting to resolve the CO2 band at 7159 Å identified in the spectrum of Venus by Spinrad (1962), we discovered a new band at 7105 Å. Both bands are fully resolved on our spectra and tentative J numbers have been assigned to the rotational lines. In both cases, the P branch appears to be anomalously weak. The 7159 Å band has been observed in the laboratory (unresolved) by Herzberg and Herzberg (1953) at path lengths on the order of 55 km atm. To our knowledge, the 7105 Å band has not been recorded previously. Following the predictions of Herman (1948) the two bands are given the assignments 5v3 + 2v2 + v1 (7159 Å) and 5v3 + 2v1 (7105 Å). An unsuccessful attempt was made to find the third member of this triad, 5v3 + 4v2. In view of the very large amount of carbon dioxide apparently required to produce these absorptions, further study in the laboratory and at the telescope is encouraged.

Type
Part I: Venus
Copyright
Copyright © Reidel 1971 

References

Herman, R. C.: 1948, Astrophys. J. 107, 386.Google Scholar
Herzberg, G. and Herzberg, L.: 1953, J. Opt. Soc. Am. 43, 1037.Google Scholar
Spinrad, H.: 1962, Astrophys. J. 135, 651.Google Scholar