IAFE 05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Multicolour photometry and CORAVEL radial velocities of
stars of the open cluster NGC 2489
Autor/es:
PIATTI, ANDRÉS E.; CLARIA OLMEDO, JUAN JOSÉ; MERMILLIOD, J.C.; PARISI, M.C.; AHUMADA, A.V.
Revista:
Bol. Asociación Argentina de Astronomía
Editorial:
Eds. G. Dubner, M. Rovira, A.E. Piatti
Referencias:
Año: 2008 vol. 50 p. 133 - 136
Resumen:
We present CCD BVI photometry in the field of the open cluster NGC 2489, supplemented with CORAVEL radial velocities (RVs) for 7 red giant candidates. A cluster angular radius of (3.5 +/- 0.3) pc is estimated from star counts. The comparison of the cluster colour-magnitude diagram with isochrones of the Padova group yields E(B-V) = 0.30 +/- 0.05, E(V-I) = 0.40 +/- 0.05, and V-Mv = 12.20 +/- 0.25for log t (age) = 8.70 and Z = 0.019. The analysis of the RVs allowed us to confirm cluster membership for 6 red giants, one of them being a spectroscopic binary. The properties of a sample of open clusters aligned along the line-of-sight to NGC 2489 are examined.
