Line spectrum variations in the silicon Ap star HD 27309.

Details Line spectrum variations in the silicon Ap star HD 27309. Line spectrum variations in the silicon Ap star HD 27309.

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60..957i&link_type=abstract

Astronomicheskii Zhurnal, Tom 60, No. 5, p. 957 - 959

Astronomy and Astrophysics

Astronomy

1

Silicon Stars:Spectral Variations

Scientific paper

The equivalent widths of 29 lines in the spectrum of the peculiar silicon Ap star HD 27309 were measured on 7 spectrograms with a dispersion of 9 Å/mm. The results show that line intensities of Si II, Fe II and Ti II vary by about 40% over the cycle of the star. According to Peterson's blanketing hypothesis the obtained spectrum variations are in phase with the photometric variations.

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