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

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/32007

Title :	Large-Scale Structures in OB Supergiants: from an Inhomogeneous Surface to a Structured Wind
Language :	English
Author, co-author :	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]
Publication date :	1-May-2003
Main document title :	Bulletin of the American Astronomical Society
Pages :	755
Audience :	International
Abstract :	[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 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).
Permalink :	http://hdl.handle.net/2268/32007
Other URL :	http://adsabs.harvard.edu/abs/2003AAS...202.3909M
Commentary :	202

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