Bibcode
DOI
Alfaro, Emilio J.; Aparicio, Antonio; Delgado, Antonio J.; Garcia-Pelayo, Jose M.; Cabrera-Cano, Jesus
Bibliographical reference
Astronomical Journal (ISSN 0004-6256), vol. 103, Jan. 1992, p. 204-218. Research supported by Education and Research Council of the Autonomical Government of Andalucia.
Advertised on:
1
1992
Citations
8
Refereed citations
7
Description
Six CCD frames for two fields in the area of the rich, presumably old,
and unstudied open cluster IC 1311 have been obtained in the BVR bands.
The photometric analysis leads to an estimated age of between 1 Gyr
(standard models) and 2 Gyr (overshooting models), placing the cluster
at a distance of about 4.8 kpc from the sun. Comparison of the
observational color-magnitude diagram (CMD) with model isochrones
produces a good fit for a metallicity of Z = 0.006-0.008. Some
morphological features displayed by the CMD of this cluster are better
understood in terms of convective overshooting rather than by classical
theories. The location of IC 1311 on the age-metallicity diagram
suggests an ecological environment for its formation more similar to
that found in the LMC than in the solar vicinity.