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Image-Orthicon Spectra of Geminids in 1969

Published online by Cambridge University Press:  12 April 2016

P. M. Millman
Affiliation:
National Research Council of Canada Ottawa, Ontario
A. F. Cook
Affiliation:
Smithsonian Astrophysical Observatory Cambridge, Massachusetts
C. L. Hemenway
Affiliation:
State University of New York at Albany and Dudley Observatory Albany, New York
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Abstract

The spectra of 25 meteors, recorded with an image-orthicon technique in December 1969, are studied in relation to similar records made in August of the same year. Of 19 Geminid meteors in the absolute visual magnitude range 0 to + 2, only one showed any evidence of the forbidden line of oxygen at 5577 Å, while all Perseid meteors recorded in August exhibited the oxygen line, a result of the large difference in geocentric velocity between the two showers. Atoms identified in faint Geminid meteors include neutral iron, magnesium, calcium and sodium. The molecular bands of nitrogen are also observed.

Type
Research Article
Copyright
Copyright © NASA 1971

References

Hemenway, C. L., Swider, A., and Bowman, C., 1971. Meteor spectroscopy using an image orthicon, Can. J. Phys., 49, 13611364.CrossRefGoogle Scholar
Mckinley, D. W. R., and Millman, P. M., 1949. A phenomenological theory of radar echoes from meteors, Proc. Inst. Radio Eng., 37, 364375.Google Scholar
Millman, P. M., Cook, A. F., and Hemenway, C. L., 1971. Spectroscopy of Perseid meteors with an image orthicon, Can. J. Phys., 49, 13651373.CrossRefGoogle Scholar
Moore, C. E., 1945. A multiplet table of astrophysical interest, Contrib. Princeton Univ. Obs., No. 20, parts 1, 2.Google Scholar
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