Abstract
Periodic variations of emission line intensities and radial velocities in three S-type symbiotic stars: BF Cyg, CI Cyg and AX Per are presented and discussed. The behavior of emission lines is different in these objects and suggests that significant differences in physical conditions and geometry may occur in these seemingly similar systems.
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Mikolajewska, J. Periodic variations in the symbiotic star spectra. Astrophys Space Sci 131, 713–723 (1987). https://doi.org/10.1007/BF00668164
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DOI: https://doi.org/10.1007/BF00668164