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Constraints on the wind structure of O-B stars from theoretical He II lines.
(IOP Publishing, 2002-10)
Theoretical profiles of He ii lines in OB stars with an expanding, spherically symmetric atmosphere are computed. The extended atmospheric model is formed by a classical photosphere, characterized by the effective temperature ...
Study of the inner dust envelope and stellar photosphere of the AGB star R Doradus using SPHERE/ZIMPOL
(EDP Sciences, 2016)
Context. On the asymptotic giant branch (AGB) low-and intermediate-mass stars eject a large fraction of their envelope, but the mechanism driving these outflows is still poorly understood. For oxygen-rich AGB stars, the ...
Mechanical behavior of a composite material using a polyester matrix reinforced with Guadua angustifolia bamboo fibers
(Bogotá - Ingeniería - Doctorado en Ingeniería - Ingeniería CivilUniversidad Nacional de Colombia - Sede Bogotá, 2020-08-03)
Las fibras naturales se han convertido en un recurso valioso para la industria de los materiales compuestos. Su uso como refuerzo de matrices poliméricas le proporciona múltiples beneficios al material compuesto, siendo ...