The ultraviolet high-resolution spectrum of Feige 86.
Abstract
The high-resolution far-ultraviolet spectrum of the halo Bp star Feige 86 is studied. The energy distribution gives T(e) between 17000 and 18000 K and log g between 4 and 4.5. 1640 He II is mainly He-3. The resonance lines of NV, CIV, SiIV are present and show three components each: one shortward-shifted by about 1.5 A and one longward-shifted by about 0.4 A. The presence of these high-ionization features suggests the existence of a corona and large mass motions, posing serious problems for the diffusion theory.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1980
- Bibcode:
- 1980A&A....81L...1H
- Keywords:
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- Line Spectra;
- Stellar Spectra;
- Ultraviolet Astronomy;
- Coronas;
- Far Ultraviolet Radiation;
- Helium;
- High Resolution;
- Astrophysics