IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A high resolution spectroscopic study of the interacting binary R Arae
Autor/es:
ARIAS, MARÍA LAURA; SAHADE, JORGE; BARBÁ, RODOLFO
Lugar:
Cariló, Argentina
Reunión:
Workshop; International Workshop: Massive Stars: Fundamental Parameters and Circumstellar Interactions; 2006
Resumen:
 R Arae is an eclipsing binary probably similar to the strong interacting system of b Lyrae. The main differences in the spectroscopic behavior between both systems may be related to differences in the relative dimensions of both objects. In the present work we analize a series of high-resolution spectroscopic observations of R Arae obtained at CTIO, Chile, that cover more than an orbital cycle. The observed spectral range corresponds to 5500-7000 Å. The spectra show both absorption and emission features that follow the motion of the brighter component of the system and display changes throughout the cycle of light variation. We analize the behavior of the strongest lines (e.g. He I 5876, Ha and Si II 6347) with the pursose of shading more light into the nature of this object, particularly on the phenomena that are taking place in the circumstellar material.