Abstract
Spectroscopic observations of the Be stars λ Eri, χ Oph, 66 Oph, and η Ori for the period 1982–1988 are reported. The NRP hypothesis was verified on the ground of rapid line profile variability, radial velocities, and equivalent widths. The star λ Eri is pulsating in bothl=2 andl=8 with period 0 d. 7. Pulsation in modesl=2 andl=4 are observed in Hei profiles of χ Oph for May 1982. For radial velocities has been obtained a period 0 d. 913. The H γ and Hβ lines of 66 Oph for April–August 1983 are in emission state with two clearly expressed components with intensity variations. All the parameters measured have the same period of variation — 0 d. 025. For η Ori variations in line profiles for component Ab have been observed and a period of 0 d. 463 found for the radial velocities.
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Borissova, I.H. Spectral investigation of some Be stars for NRP variability. Astrophys Space Sci 195, 303–316 (1992). https://doi.org/10.1007/BF00646763
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DOI: https://doi.org/10.1007/BF00646763