Large-Scale Structures in OB Supergiants: from an Inhomogeneous Surface to a Structured Wind

Details Large-Scale Structures in OB Supergiants: from an Inhomogeneous Surface to a Structured Wind Large-Scale Structures in OB Supergiants: from an Inhomogeneous Surface to a Structured Wind

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.3909m&link_type=abstract

American Astronomical Society Meeting 202, #39.09; Bulletin of the American Astronomical Society, Vol. 35, p.755

Astronomy and Astrophysics

Astronomy

Scientific paper

In 2000-2001 we performed long-term spectroscopic monitoring of a sample of bright OB-supergiants aimed at establishing the incidence of co-rotating, large-scale wind structures. In the optical, this can be achieved by detecting rotationally modulated variability in Hα . Practically all the surveyed stars show dramatic line-profile variations operating on a daily (and in some cases on a hourly) timescale. Here we discuss the case of HD 14134 (B3 Ia) where a periodic modulation seen in the optical continuum (stellar surface, P=12.825d) triggers spectacular variations in the Hα emission line (stellar wind).

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