Physics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...82..395a&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 82, no. 1, Sept. 1992, p. 395-404. Research supported by NSERC.
Physics
2
Astronomical Photometry, Stellar Physics, Variable Stars, Wolf-Rayet Stars, Light Curve, Power Spectra, Stellar Luminosity, Stellar Winds
Scientific paper
Nine nearly contiguous nights of intensive V-band photometry of the WN6 star HD 191765 from 1990 August 21 to 31 show mainly irregular, noisy variability on different time scales from a few hours to several days. The dominating detectable nightly time scales range over about 5-10 hr with amplitudes less than or approximately equal to 0.007 mag. The main source of this variability is likely related to the recently proposed scenario of stochastic blob propagation in the wind, with a time scale of the order of 10 hr. However, there is also evidence for a 2-day quasi-periodicity as seen in some previous data. This may be related to some kind of rotating clock, as seen more clearly in the WN5 star EZ CMa.
Antokhin Igor I.
Cherepashchuk Anatol M.
Irsmambetova T. R.
Marchenko Sergey V.
Moffat Anthony F. J.
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