PERSONAL DE APOYO
GROSSO Monica Gladys
congresos y reuniones científicas
Título:
Investigación observacional sobre el papel de las estrellas binarias en la ecología de cúmulos estelares
Autor/es:
GONZÁLEZ, J. F.; LEVATO, H.; GROSSO, M.
Reunión:
Congreso; Reunion Anual de la Asociacion Argentina de Astronomia; 2001
Resumen:
We present preliminary results of a long-term project devoted to the observational study of the binary star population in open clusters and its connection with the dynamical and evolutionary properties of the clusters. We report the discovery of 17 double-lined spectroscopic binaries, 30 radial velocity variables and about 30 suspected variables. In the 17 clusters of our sample the binary frequency ranges between 20 and 40 %, and reaches typically 60 % if all suspected binaries are included. We study the spatial distribution of the binary stars with respect to the cluster center and we discuss the statistical correlation of the mass-ratio distribution with the cluster age.