Large-scale Wind Structures in OB Supergiants: a Search for Rotationally Modulated Hα variability

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/2409

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
URI:	http://hdl.handle.net/2248/2409
Appears in Collections:	BASI Publications

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