H-alpha profile variability in Kappa Orionis, B0.5 IA

Details H-alpha profile variability in Kappa Orionis, B0.5 IA H-alpha profile variability in Kappa Orionis, B0.5 IA

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77l..10s&link_type=abstract

Astronomy and Astrophysics, vol. 77, no. 3, Aug. 1979, p. L10-L13. Research supported by the Consiglio Nazionale delle Ricerche

Astronomy and Astrophysics

Astrophysics

4

Early Stars, H Alpha Line, Stellar Spectra, Supergiant Stars, Absorption Spectra, B Stars, Emission Spectra, Stellar Atmospheres

Scientific paper

H-alpha profile changes in the spectrum of Kappa Orionis, B0.5 Ia, are determined from coude plates at 12.7 A/mm dispersion. The double-peaked-absorption-plus-central-emission core shows noticeable variations, even over periods of one day. The line appears to vary also in the extension of the wings. The self-reversal may provide evidence for the presence of hot regions surrounding the star photosphere.

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