A study of the supergiant 89 Her

Details A study of the supergiant 89 Her A study of the supergiant 89 Her

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008arep...52..847k&link_type=abstract

Astronomy Reports, Volume 52, Issue 10, pp.847-851

Astronomy and Astrophysics

Astronomy

97.20.Pm, 97.10.Ri, 97.10.Tk

Scientific paper

We have used spectrograms taken with a dispersion of 8 12 Å per mm and Kurucz model atmospheres to study the supergiant 89 Her (F2Ibe).We find the effective temperature and gravity T eff = 6300 ± 150 K and log g = 0.5 ± 0.2. We have analyzed the microturbulence in the star’s atmosphere based on FeI, FeII, and TiII lines, deriving ξ t = 7.0 ± 0.5 km/s for the FeI and TiII lines and ξ t = 8.0 ± 0.5 km/s for the FeII lines. Abundances were determined for 23 elements. The elemental abundances in the atmosphere of 89 Her show deficiencies compared to the solar chemical composition, except for sodium, which is overabundant relative to the Sun.

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