Model chromosphere and transition region for 56 Peg (K0 IIp + wd): A preliminary study

Details Model chromosphere and transition region for 56 Peg (K0 IIp + wd): A preliminary study Model chromosphere and transition region for 56 Peg (K0 IIp + wd): A preliminary study

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.233m&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 233-236 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

Binary Stars, Chromosphere, Iue, Spaceborne Astronomy, Stellar Models, Ultraviolet Astronomy, Ultraviolet Spectra, Stellar Envelopes, Stellar Winds

Scientific paper

Observations by IUE of 56 Peg (K0 IIp + wd) show the presence of ultraviolet emission lines associated with warm (100,000 K) material. Although it was suggested that this emission comes from an ionized region in a cool wind around the secondary, the characteristics of the emission indicate that the lines are formed in a transition region around the late-type supergiant. A self-consistent model chromosphere and transition region are presented as further evidence. A satisfactory model, taking into account the transition region material, the variable asymmetry in Mg II, and the X-ray emission might be possible in terms of a hybrid supergiant with an X-ray illuminated cool wind.

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