IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Revealing the parameters of the open cluster Ruprecht 58
Autor/es:
E. GIORGI, R.A. VAZQUEZ, G.R. SOLIVELLA, R.B. ORELLANA, J. NUÑEZ
Revista:
New Astronomy
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam, The Netherlands; Año: 2006
ISSN:
1384-1076
Resumen:
We present results of a study that combines $UBVI$ photometry, MK spectral classification and proper motions in the area of the, up to now unknown, open cluster Ruprecht 58 at the Puppis region. Star counts from the 2MASS data catalog together with the analysis of CCD $UBVI$ photometry demonstrate that it is a real open cluster with $9'$ size approximately. The cluster is placed at a distance of 3.9 kpc and is about 250 Myr old with mean reddening $E_{(B-V)} = 0.33$\,mag. Proper motions confirm Ruprecht 58 is a real cluster with mean absolute proper motions $\mu_{\alpha} cos \delta = xxx\pm xxx$~ mas/yr and $\mu_{\delta} = xxx \pm xxx$~ mas/yr. The computation of the cluster mass spectrum slope yielded $x= 1.8$ in the mass range from $\approx 1.4$ to $\approx 4 m_{\odot}$, therefore being steeper than the value of the field star mass distribution.