Abstract
We report here on EUV observations of a sunspot observed by the Harvard instrument on Skylab. The observational data used here have been presented in a previous paper by Noyes et al. (1982), in which line identifications and intensities for the wavelength region 350 – 1350 A were given. Several electron density sensitive line ratios suggest a constant density, rather than constant pressure, emitting region, while temperature diagnostic line ratios of several ions yield temperatures below the temperatures expected in ionization equilibrium.
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References
Foukal, P.V.: 1976, Astrophys.J. 210, 575.
Noyes, R.W., Raymond, J.C., Doyle, J.G., and Kingston, A.E.: 1982, Astrophys.J. (submitted).
Pneuman, G.W. and Kopp, R.A.: 1977, Astron.Astrophys. 55, 305.
Raymond, J.C. and Foukal, P.V.: 1982, Astrophys.J. 253, 323.
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© 1983 Springer Science+Business Media Dordrecht
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Doyle, J.G., Raymond, J.C., Noyes, R.W., Kingston, A.E. (1983). The Interpretation of EUV Spectra of Sunspots. In: Byrne, P.B., Rodonò, M. (eds) Activity in Red-Dwarf Stars. Astrophysics and Space Science Library, vol 102. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7157-8_37
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DOI: https://doi.org/10.1007/978-94-009-7157-8_37
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