Variability of single Wolf--Rayet stars in the continuum and emission lines
Narrow-band (..delta..lambda = 90 A) photoelectric observations of HD 191765 (WN 6) and HD 192103 (WC 7) in the continuum (lambda 4789) and the emission bands lambda 4686 and 4653 have been made for five years. For both these WR stars the rms variability amplitude is 0.010m to 0.014m for the continuum and 0.019m to 0.023m for the intensities of the emission bands. The characteristic variability time in the continuum and the lines is several days. The light of both WR stars in the continuum remained constant on the average for five years within the limits +-0.005m. During the five years the intensities of the emission bands were also constant to within +-0.02m. No appreciable fluctuations of the continuum or the lines were noted during the course of a night. The rms amplitude of the continuum variability of the two WR stars was three to four times less than the amplitude of the physical variability of the nucleus of the WR star in the binary system V 444 Cyg, which may indicate that HD 191765 and HD 192103 really are single WR stars without any satellites.
- Research Organization:
- State Astronomical Inst., Moscow
- OSTI ID:
- 7361382
- Journal Information:
- Astrophysics (Engl. Transl.); (United States), Vol. 10:3; Other Information: Translated from Astrofizika; 10: No. 3, 347-356(1974)
- Country of Publication:
- United States
- Language:
- English
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