EUV resonance radiation from helium atoms and ions in the geocorona
1972; American Geophysical Union; Volume: 77; Issue: 7 Linguagem: Inglês
10.1029/ja077i007p01190
ISSN2156-2202
Autores Tópico(s)Astro and Planetary Science
ResumoJournal of Geophysical Research (1896-1977)Volume 77, Issue 7 p. 1190-1204 EUV resonance radiation from helium atoms and ions in the geocorona R. R. Meier, R. R. MeierSearch for more papers by this authorC. S. Weller, C. S. WellerSearch for more papers by this author R. R. Meier, R. R. MeierSearch for more papers by this authorC. S. Weller, C. S. WellerSearch for more papers by this author First published: 1 March 1972 https://doi.org/10.1029/JA077i007p01190Citations: 62AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract We computed the emission of He 584-A and He+ 304-A radiation from the geocorona, assuming resonance scattering of solar radiation. Comparison of these calculations with recent rocket experiments shows that (a) the Jacchia 1970 He model gives the observed variation of 584 A with altitude and solar zenith angle, but large discrepancies are evident in the absolute value of the emission rate; (b) both the magnitude and the spatial variation of 304 A can be explained by a model that constrains the helium ions to be within the plasmasphere; and (c) an extraterrestrial source of EUV radiation is implied by the inability of the models to predict the observed emission rate in the antisolar direction. References Axford, W. I., The polar wind and the terrestrial helium budget, J. Geophys. Res., 73, 6855, 1968. Bame, S. J., A. J. Hundhausen, J. R. Asbridge, I. B. Strong, Solar wind ion composition, Phys. 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Smith, Positive ion composition in the magnetoionosphere obtained from the Ogo A satellite, J. Geophys. Res., 70, 5769, 1965. Thomas, G. E., Lyman α scattering in the earth's hydrogen geocorona, 1, J. Geophys. Res., 68, 2639, 1963. Thomas, G. E., R. F. Krassa, Ogo 5 measurements of the Lyman alpha sky background, Astron. Astrophys., 11, 218, 1971. Timothy, A. F., J. G. Timothy, Long-term intensity variations in the solar helium 2 Lyman-alpha line, J. Geophys. Res., 75, 6950, 1970. Tohmatsu, T., Hydrogen and helium ultraviolet glow, Its origins and aeronomical significance, Space Res., 10, 608, 1970. Tohmatsu, T., C. Fujita, He I 584-A and He II 304-A day airglow, Rep. Ionos. Space Res., Japan, 18, 410, 1964. Weller, C. S., J. M. Young, C. Y. Johnson, J. C. Holmes, Extreme ultraviolet radiation in the night sky (abstract), Eos Trans. AGU, 51, 367, 1970. Young, J. M., G. R. Carruthers, J. C. Holmes, C. Y. Johnson, N. P. Patterson, Detection of Lyman-beta and heilum resonance radiation in the night sky, Science, 160, 990, 1968. Young, J. M., C. S. Weller, C. Y. Johnson, J. C. Holmes, Rocket observations of the far UV nightglow at Lyman α and shorter wavelengths, J. Geophys. Res., 76, 3710, 1971. Citing Literature Volume77, Issue7Space Physics1 March 1972Pages 1190-1204 ReferencesRelatedInformation
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