Variability of the H-alpha line in the magnetic variable star Beta Coronae Borealis

Details Variability of the H-alpha line in the magnetic variable star Beta Coronae Borealis Variability of the H-alpha line in the magnetic variable star Beta Coronae Borealis

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sval....4...73g&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 4, Mar. 1978, p. 138, 139.) Soviet Astronomy Letters, vol. 4, Mar.-Apr. 1978, p. 73, 74

Astronomy and Astrophysics

Astronomy

1

H Alpha Line, Magnetic Stars, Magnetic Variations, Spectral Line Width, Stellar Spectra, Variable Stars, Astronomical Spectroscopy, Magnetic Flux, Spectrum Analysis, Stellar Magnetic Fields, Stellar Rotation

Scientific paper

The behavior of the H-alpha line in the spectrum of the magnetic variable Ap star Beta CrB over the star's 18.487-day rotation period is examined on the basis of 23 spectrograms obtained with a dispersion of 6 A/mm. Variations in the equivalent width of the H-alpha line with a maximum amplitude of 3 to 4 A are detected which have a period equal to the rotation period of the star. It is found that the most widely differing H-alpha profiles are observed at phases 0.00 and 0.33, which correspond to the minimum and maximum values, respectively, of the star's magnetic-field strength.

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