Estrellas Asociadas con Planetas Extrasolares vs. Estrellas de Tipo Beta Pictoris

C. CHAVERO, M. GÓMEZ

Buenos Aires

Congreso; 45 Reunión de la Asociación Argentina de Astronomía; 2002

Instituto de Astronomía y Física del Espacio (IAFE) - Asociación Argentina de Astronomía

In this contribution we initially confront physical properties of two groups of stars: the Planet Host Stars and the Vega-like objects. The Planet Host Star group has one or more planet mass object associated and the Vega-like stars have circumstellar disks. We have compiled magnitudes, colors, parallaxes, spectral types, etc. for these objects from the literature and analyzed the distribution of both groups. We find that the samples are very similar in metallicities, ages, and spatial distributions. Our analysis suggests that the circumstellar environments are probably different while the central objects have similar physical properties. This difference may explain, at least in part, why the Planet Host Stars form extra-solar planetary objects such as those detected by the Doppler effect while the Vega-like objects are not commonly associated with these planet-mass bodies.