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Title: Large-scale Wind Structures in OB Supergiants: a Search for Rotationally Modulated Hα variability
Authors: Morel, T
Marchenko, S. V
Pati, A. K
Kuppuswamy, K
Carini, M. T
Keywords: Stars: early-type;Stars: supergiants;Stars: emmision-line;Stars: winds;Outflows;Stars: rotation;stars: individual;HD 14134;HD 24912
Issue Date: 2003
Publisher: Astronomical Society of India
Citation: BASI, Vol. 31, No. 3&4, pp. 333 - 335
Abstract: We present preliminary results of a long-term spectroscopic monitoring of a sample of bright OB-supergiants aimed at establishing the incidence of co-rotating, large-scale wind structures by detecting rotationally modulated variability in H. Dramatic line-profile variations operating on a daily (and in some cases on a hourly) timescale are observed. A detailed period analysis has been so far carried out for 2 stars, and revealed in both cases the existence of cyclical H variations consistent with rotational modulation. In the case of HD 14134, the same periodicity is found in the contemporaneous light curve
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