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

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

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basi...31..333m&link_type=abstract

Bulletin of the Astronomical Society of India, vol. 31, p.333-335

Astronomy and Astrophysics

Astronomy

Stars: Early-Type, Stars: Supergiants, Stars: Emission-Line, Stars: Winds, Outflows, Stars : Rotation, Stars: Individual: Hd 14134

Scientific paper

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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