|Reference : Large-Scale Structures in OB Supergiants: from an Inhomogeneous Surface to a Structured ...|
|Scientific congresses and symposiums : Paper published in a book|
|Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics|
|Large-Scale Structures in OB Supergiants: from an Inhomogeneous Surface to a Structured Wind|
|Morel, Thierry [Osservatorio Astronomico di Palermo G. S. Vaiana, Istituto Nazionale di Astrofisica > > > >]|
|Marchenko, S. V. [Western Kentucky University]|
|Pati, A. K. [Indian Institute of Astrophysics (IIAP), Bangalore, India]|
|Kuppuswamy, K. [Vainu Bappu Observatory, Indian Institute of Astrophysics (IIAP), India]|
|Carini, M. T. [Western Kentucky University]|
|Wood, E. [Western Kentucky University]|
|Zimmerman, R. [Western Kentucky University]|
|Bulletin of the American Astronomical Society|
|[en] 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 HÎ± . 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 HÎ± emission line (stellar wind).|
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