Abstract
The IUE spectrum of the star HD 139521, a giant of class G8III is obtained and based on the analysis of the narrow structure of 2795 (k) and 2803 (h) MgII emission profiles, the existence of a circumstellar cloud around the giant star is assumed. This conclusion is confirmed also by the anomaly of the small observed power of the doublet MgII emission at 2800. The absorption cores on the peaks of the emission profiles MgII k andh are mainly of interstellar origin and only partly — due to self-absorption in the star's chromosphere.
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Ayres, T. R., Simon, Th., and Linsky, J. L.: 1982,Astrophys. J. 263, 791.
Basri, G. S. and Linsky, J. L.: 1979,Astrophys. J. 234, 1023.
Buscombe, W.: 1977,Third General Catalogue of MK Spectral Classification, Northwestern University.
Cholakyan, V. G.: 1986,Astrofizika 25, 309.
Crutcher, R. M.: 1982,Astrophys. J. 254, 82.
Gurzadyan, G. A.: 1981,Astrophys. Space Sci. 80, 197.
Gurzadyan, G. A.: 1984,Stellar Chromospheres or Doublet 2800 Mg II in Astrophysics, Nauka, Moscow (in Russian).
Gurzadyan, G. A.: 1987,Astron. Astrophys. 173, 284.
Hirshfeld, A. and Sinnot, R. W.: 1982,Sky Catalogue 2000, Vol. 2, Cambridge University Press, Cambridge.
Kondo, Y., Modisette, J. L., and Wolf, G. H.: 1974,Astrophys. J. 199, 110.
McClintock, W., Moos, H. W., Henry, R. C., Linsky, J. L., and Barker, E. S.: 1978,Astrophys. J. Suppl. Ser. 37, 223.
Stencel, R. E. and Mullan, D. J.: 1980,Astrophys. J. 238, 221.
Vladilo, G., Molaro, P., Crivellari, L., Foing, B. H., Beckman, J. E., and Genova, R.: 1987,Astron. Astrophys. 185, 233.
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Gurzadyan, G.A., Kondo, Y., Ohanesyan, J.B. et al. A cool giant with a circumstellar cloud. Astrophys Space Sci 176, 61–68 (1991). https://doi.org/10.1007/BF00643077
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DOI: https://doi.org/10.1007/BF00643077