Abstract
The EUV spectrum of a solar active region observed by SERTS-89 is used to estimate physical parameters such as electron density, elemental abundance and inhomogeneity in the emitting source. A total of 13 ions, namely, Neiv-vi, Mgv-ix, Sivii-x and Sx, are studied in the SERTS spectral range 170-450 Ú, providing plasma diagnostics at temperatures between105 –106 K. Attention is called to results derived from ion pairs of different elements that are formed over similar temperature regimes, which allow special checks on the standard assumptions of spectral analyses. Some EUV lines, not originally reported in the SERTS-89 spectrum, are shown to have measureable intensities and are indicated for future observations.
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Arnaud, M. and Rothenflug, R.: 1985, Astron. Astrophys. Suppl. 60, 425.
Behring, W. E., Cohen, L., Feldman, U., and Doschek, G. A.: 1976, Astrophys. J. 203, 521.
Berrington, K. A.: 1994, Atomic Data Nuclear Data Tables 57, 71.
Brown, J. C., Dwivedi, B. N., Almleaky, Y., and Sweet, P. A.: 1991, Astron. Astrophys. 249, 227.
Dwivedi, B. N.: 1994a, Space Sci. Rev. 65, 289.
Dwivedi, B. N.: 1994b, Solar Phys. 153, 199.
Dwivedi, B. N.: 1996, Solar Phys. 165, 399.
Dwivedi, B. N. and Mohan, A.: 1995a, Solar Phys. 158, 237.
Dwivedi, B. N. and Mohan, A.: 1995b, Solar Phys. 156, 81.
Jordan, C. and Wilson, R.: 1971, in C. J. Macris (ed.), Physics of the Solar Corona, D. Reidel Publ. Co., Dordrecht, Holland, p. 219.
Kato, T.: 1994, Atomic Data Nuclear Data Tables 57, 181.
Lang, J. and Summers, H. P.: Atomic Data Nuclear Data Tables 57, 215.
Malinovsky, M. and Héroux, L.: 1973, Astrophys. J. 181, 1009.
Meyer, J. P.: 1985, Astrophys. J. Suppl. 57, 151.
Mohan, A. and Dwivedi, B. N.: 1996, Solar Phys. 167, 145.
Monsignori Fossi, B. C. and Landini, M.: 1994, Atomic Data Nuclear Data Tables 57, 125.
Sampson, D. H., Zhang, H. L., and Fontes, C. J.: 1994, Atomic Nuclear Data Tables 57, 97.
Thomas, R. J. and Neupert, W. M.: 1994, Astrophys. J. Suppl. 91, 461.
Vernazza, J. E. and Reeves, E. M.: 1978, Astrophys. J. Suppl. 37, 485.
Widing, K. G. and Feldman, U.: 1989, Astrophys. J. 442, 446.
Widing, K. G., Feldman, U., and Bhatia, A. K.: 1986, Astrophys. J. 308, 982.
Young, P. R.: 1996, personal communication.
Young, P. R., Landi, E., and Thomas, R. J.: 1998, Astron. Astrophys. 329, 291.
Zhang, H. L., Graziani, M., and Pradhan, A. K.: 1994, Astron. Astrophys. 283, 319.
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Dwivedi, B., Mohan, A. & Thomas, R. Spectral Diagnostics of an Active Region Observed by the Solar EUV Rocket Telescope and Spectrograph (SERTS). Solar Physics 180, 157–178 (1998). https://doi.org/10.1023/A:1005077001491
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DOI: https://doi.org/10.1023/A:1005077001491