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We present the results of a search for and analysis of line-profile variations in the spectrum of the star ι Her. The observations were acquired with the 1.8 m telescope of the Bohyunsan Optical Astronomy Observatory (Republic of Korea) in May-June 2004. We obtained 69 spectra of the star with signal-to-noise ratios ≈300 and a time resolution of 5-7 min. Profile variability was revealed for six lines of HI, HeI, and SiIII, in the central parts of the lines. The variability amplitude is ≈(1-2)% in units of the intensity of the adjacent continuum. Evidence was found for cyclic variations of the lines, with periods from ≈7h to ≈2.9d. We conclude that ι Her belongs to the group of slowly pulsating stars.
Original language | English |
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Pages (from-to) | 220-231 |
Number of pages | 12 |
Journal | Astronomy Reports |
Volume | 50 |
Issue number | 3 |
DOIs | |
State | Published - 1 Mar 2006 |
ID: 36161658