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Density and temperature diagnostics of solar emission lines from NeVI and MgVI

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Abstract

Line intensity ratios of NeVI lines with respect to a resonance line of MgVI have been considered for electron density and temperature determinations within the chromosphere-corona transition region. The electron pressure within the transition region has been assumed to be constant. In addition, these ratios would enable us to estimate the relative element abundances of neon to magnesium. An attempt has been made to explain the extreme ultraviolet intensities of NeVI and MgVI lines as observed by ATM ultraviolet spectrometer. The observed intensities correspond to the average quiet-Sun conditions near solar minimum. Theoretical intensities for NeVI and MgVI lines have been computed using a model solar atmosphere. Theoretical intensities obtained by using the values 3.98 × 10−5 and 3.16 × 10−5 for element abundance of Ne and Mg, respectively, seem to agree well with the expected intensities. The agreement between some of the expected and computed intensities suggests the need for future observations at higher spectral resolutions to resolve difficulties arising out of blending due to two or more lines.

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References

  • Arnaud, M. and Rothenflug, R.: 1985,Astron. Astrophys. Suppl. 60, 425.

    Google Scholar 

  • Bhatia, A. K. and Kastner, S. O.: 1988,Astrophys. J. 332, 1063.

    Google Scholar 

  • Bhatia, A. K. and Mason, H. E.: 1980,Monthly Notices Roy. Astron. Soc. 190, 925.

    Google Scholar 

  • Brown, W. A., Bruner, M. E., Action, L. W., and Mason, H. E.: 1986,Astrophys. J. 301, 981.

    Google Scholar 

  • Czyzak, S. J., Aller, L. H., and Euwema, R. N.: 1974,Astrophys. J. Suppl. 28, 465.

    Google Scholar 

  • Doschek, G. A.: 1984,Astrophys. J. 279, 446.

    Google Scholar 

  • Dufton, P. L., Doyle, J. G., and Kingston, A. E.: 1979,Astron. Astrophys. 78, 318.

    Google Scholar 

  • Dwivedi, B. N.: 1988,Adv. Space Res. 8, No. 11, 185.

    Google Scholar 

  • Dwivedi, B. N. and Gupta, A. K.: 1991,Adv. Space Res. 11, No. 1, 307.

    Google Scholar 

  • Dwivedi, B. N. and Raju, P. K.: 1980,Solar Phys. 68, 111.

    Google Scholar 

  • Edlen, B.: 1984,Phys. Scripta 30, 135.

    Google Scholar 

  • Elzner, L. R.: 1976,Astron. Astrophys. 47, 9.

    Google Scholar 

  • Feldman, U., Doschek, G. A., Mariska, J. T., Bhatia, A. K., and Mason, H. E.: 1978,Astrophys. J. 226, 674.

    Google Scholar 

  • Feldman, U. and Widing, K. G.: 1990,Astrophys. J. 363, 292.

    Google Scholar 

  • Feldman, U.: 1992,Phys. Scripta 46, 202.

    Google Scholar 

  • Flower, D. R. and Nussbaumer, H.: 1975a,Astron. Astrophys. 45, 145.

    Google Scholar 

  • Flower, D. R. and Nussbaumer, H.: 1975b,Astron. Astrophys. 45, 349.

    Google Scholar 

  • Gabriel, A. H. and Jordan, C.: 1972, in E. McDaniel and M. C. McDowel (eds.),Case Studies in Atomic Collision Physics, Vol. II, North-Holland Publ. Co., Amsterdam, p. 210.

    Google Scholar 

  • Giles, K.: 1981,Monthly Notices Roy. Astron. Soc. 195, 63P.

  • Jordan, C.: 1969,Monthly Notices Roy. Astron. Soc. 142, 501.

    Google Scholar 

  • Kato, T.: 1976,Astrophys. J. Suppl. 30, 397.

    Google Scholar 

  • Kelly, R. L. and Palumbo, L. J.: 1973,Atomic and Ionic Emission Lines below 2000 Å, NRL Report 7599.

  • Malinovsky, M. and Héroux, L.: 1973,Astrophys. J. 181, 1009.

    Google Scholar 

  • Raju, P. K. and Dwivedi, B. N.: 1979,Pramana 13, 319.

    Google Scholar 

  • Raju, P. K. and Dwivedi, B. N.: 1990,Astrophys. Space Sci. 173, 13.

    Google Scholar 

  • Saraph, H. E., Seaton, M. J., and Shemming, J.: 1968,Phil. Trans. Roy. Soc. London 264, 77.

    Google Scholar 

  • Vernazza, J. E. and Mason, H. E.: 1978,Astrophys. J. 226, 720.

    Google Scholar 

  • Vernazza, J. E. and Reeves, E. M.: 1978,Astrophys. J. Suppl. 37, 485.

    Google Scholar 

  • Widing, K. G. and Feldman, U.: 1989,Astrophys. J. 344, 1046.

    Google Scholar 

  • Widing, K. G., Feldman, U., and Bhatia, A. K.: 1986,Astrophys. J. 308, 982.

    Google Scholar 

  • Wiese, W. L., Smith, M. W., and Miles, B. M.: 1969,Atomic Transition Probabilities, Vol. 2, Sodium through Calcium, US Dept. of Commerce, Nat. Bur. Standards.

  • Zeippen, C. J.: 1982,Monthly Notices Roy. Astron. Soc. 198, 111.

    Google Scholar 

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Raju, P.K., Gupta, A.K. Density and temperature diagnostics of solar emission lines from NeVI and MgVI . Sol Phys 145, 241–256 (1993). https://doi.org/10.1007/BF00690654

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  • DOI: https://doi.org/10.1007/BF00690654

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