Abstract
A list of emission lines in the spectra of solar flares between 6 Å and 25 Å has been compiled using data obtained with a KAP crystal spectrometer on the OSO-5 satellite. The emission lines have been classified according to their sensitivity to flare activity. This classification provides a method for discriminating between iron in high stages of ionization (Fe xx-Fe xxv) and lower stages (Fe xvii- Fe xix), the lines of which are both present in the same spectral region during flares. Identifications consistent with these classifications are proposed. Anomalous intensities in the spectra of Fe xvii and Fe xx are pointed out, and implications of the observations for models of the X-ray emitting regions are discussed.
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Aly, M. K., Evans, J. W., and Orrall, F. Q.: 1962, Astrophys. J. 136, 956.
Batstone, R. M., Evans, K., Parkinson, J. H., and Pounds, K. A.: 1970, Solar Phys. 13, 389.
Beigman, I. L. and Urnov, A. M.:1969, Opt. Spectr. 27, 203.
Bely, O. and Bely, F.: 1967, Solar Phys. 2, 285.
Blake, R. L., Chubb, T. A., Friedman, H., and Unzicker, A. E.: 1965, Astrophys. J. 142, 1.
Chapman, R. D.: 1969, Astrophys. J. 156, 87.
Cohen, L., Feldman, U., and Kastner, S. O.: 1968, J. Opt. Soc. Am. 58, 331.
Condon, E. U. and Odabasi, H.: 1968, JILA Report No. 95.
Connerade, J. P.: 1970, Astrophys. J. 162, L139.
Connerade, J. P., Peacock, N. J., and Speer, R. J.: 1970, Solar Phys. 14, 159.
Doschek, G. A., Meekins, J. F., and Cowan, R. D.: to be published in Astrophys. J.
Evans, K. and Pounds, K. A.: 1968, Astrophys. J. 152, 319.
Evans, K., Pounds, K. A., and Culhane, J. L.: 1967, Nature 214, 41.
Fawcett, B. C.: 1970, J. Phys. B. Atom. Molec. Phys. 3, 1152.
Feldman, U. and Cohen, L.: 1967, Astrophys. J. 149, 265.
Feldman, U. and Cohen, L.: 1970, Astrophys. J. 160, L. 105.
Feldman, U., Cohen, L., and Swartz, M.: 1967, Astrophys. J. 148, 585.
Freeman, F. F., Gabriel, A. H., Jones, B. B., and Jordan, C.: 1971, Phil. Trans. Roy. Soc. London A270, 127.
Fritz, G., Kreplin, R. W., Meekins, J. F., Unzicker, A. E., and Friedman, H.: 1967, Astrophys. J. 148, L133.
Gabriel, A. H.: 1972, Monthly Notices Roy. Astron. Soc. 160, 99.
Garstang, R. H.: 1966, JILA Report No. 85.
Goldsmith, S., Feldman, U., Oren, L., and Cohen, L.: 1972, Astrophys. J. 174, 209.
Grineva, Y. I., Karev, V. I., Korneev, V. V., Krutov, V. V., Mandel'stam, S. L., Vainstein, L. A., Vasiljev, B. N., and Zhitnik, I. A.: to be published in Kosmicheskie Issledovaniya.
Jordan, C.: 1969, Monthly Notices Roy. Astron. Soc. 142, 501.
Kastner, S. O.: 1971, J. Opt. Soc. Am. 61, 335.
Liefeld, R.: 1972, private communication.
Loulergue, M.: 1971, Astron. Astrophys. 15, 216.
Mewe, R.: 1972, Solar Phys. 22, 459.
Neupert, W. M.: 1971, Solar Phys. 18, 474.
Neupert, W. M., Gates, W., Swartz, M., and Young, R. M.: 1967, Astrophys. J. 149, L79.
Parkinson, J. H.: 1972, Nature (Phys. Sci.) 236, 68.
Rugge, H. R. and Walker, A. B. C.: 1968, Space Res. 8, 439.
Shadmi, Y. and Kastner, S. O.: 1970, J. Chem. Phys. 53, 4710.
Shamey, L. J.: 1971, J. Opt. Soc. Am. 61, 942.
Swartz, M., Kastner, S. Rothe, E., and Neupert, W.: 1971, J. Phys. B. Atom. Molec. Phys. 4, 1747.
Tucker, W. H. and Koren, M.: 1971, Astrophys. J. 168, 283.
Tyren, F.: 1938, Zeit. Phys. 111, 314.
Walker, A. B. C. and Rugge, H. R.: 1969, in C. de Jager and Z. Švestka (eds.), ‘Solar Flores and Space Research’, Cospar Symp. 102.
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Neupert, W.M., Swartz, M. & Kastner, S.O. Solar flare line emission between 6 Å and 25 Å. Sol Phys 31, 171–195 (1973). https://doi.org/10.1007/BF00156081
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DOI: https://doi.org/10.1007/BF00156081