Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.195..303b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 195, no. 2, p. 303-316.
Astronomy and Astrophysics
Astrophysics
1
B Stars, Spectrum Analysis, Stellar Oscillations, Stellar Spectrophotometry, Variable Stars, H Beta Line, H Gamma Line, Line Shape, Radial Velocity
Scientific paper
Spectroscopic observations of the Be stars Lambda Eri, Chi Oph, 66 Oph, and Eta 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 Lambda Eri is pulsating in both l = 2 and l = 8 with period 0.7d. Pulsation in modes l = 2 and l = 4 are observed in He I profiles of Chi Oph for May 1982. For radial velocities has been obtained a period 0.913d. The H-gamma and H-beta 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 - 0.025d. For Eta Ori variations in line profiles for component Ab have been observed and a period of 0.463d found for the radial velocities.
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