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The Auroral Green Line in Perseid Spectra Near Sunspot Maximum

Published online by Cambridge University Press:  12 April 2016

John A. Russell
John A. Russell*
Affiliation:
University of Southern CaliforniaLos Angeles, California

Abstract

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Thirty-one spectra photographed during the Perseid showers of 1969 and 1970 are found to exhibit greater ionization and stronger, more frequent appearance of the forbidden oxygen line at 5577 Å than Perseid spectra obtained with the same instrument in 1961. Data from 13 Perseid showers indicate a relationship between the frequency of occurrence of the oxygen line and solar activity. In 1969-70, near sunspot maximum, the strength of this so-called auroral green line is greatest near shower maximum, as though the nature of the meteoroids were a function of their distance from the core of the stream, or, alternatively, the strength of the green line were a function of the altitude of the radiant.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 13: Evolutionary and Physical Properties of Meteoroids , June 1971 , pp. 141 - 146
Copyright
Copyright © NASA 1971

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