Probing the nature of possible open cluster remnants with the Southern Proper Motion Program
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile e-mail: email@example.com
2 Astronomy Department, Yale University, PO Box 208101, New Haven, CT 06520-8101, USA
3 Dipartimento di Astronomia, Università di Padova, Vicolo Osservatorio 2, 35122 Padova, Italy
Accepted: 29 November 2004
We discuss the nature of eleven Possible Open Cluster Remnants (POCRs) by using absolute proper motions from the Southern Proper Motion (SPM) Program 3 (Girard et al. [CITE], AJ, 127, 3060) combined with near infrared photometry from 2MASS. The analysis is done by considering the distribution of stars in the Color–Magnitude and the Vector Point diagrams. We successfully probed the capabilities of the SPM catalog to detect a physical group by looking at the open cluster Blanco 1. However, within the uncertainties of the SPM3 catalog and basing on 2MASS photometry we conclude that only one – ESO 282SC26 – out of eleven objects turns out to be a probable physical group. We suggest it is an open cluster 1.3 Gyr old and located 1.4 kpc from the Sun.
Key words: open clusters and associations : general / astrometry
© ESO, 2005