Volume 426, Number 3, November II 2004
|Page(s)||827 - 834|
|Section||Galactic structure, stellar clusters, and populations|
|Published online||18 October 2004|
Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Avda. Diagonal 647, 08028 Barcelona, Spain e-mail: Lola.Balaguer@am.ub.es
2 Shanghai Astronomical Observatory, CAS Shanghai 200030, PR China
3 Institute of Astronomy, Madingley Road, CB3 OHA Cambridge, UK
4 CER for Astrophysics, Particle Physics and Cosmology, associated with Instituto de Ciencias del Espacio-CSIC
5 Centro de Astrobiología (CSIC-INTA). Carretera de Ajalvir, km 4, 28850 Torrejón de Ardoz, Madrid, Spain
Accepted: 5 July 2004
We have investigated the area of two NGC entries, NGC 1817 and NGC 1807, with deep CCD photometry in the uvby– intermediate-band system. The photometric analysis of a selected sample of stars of the open cluster NGC 1817 yields a reddening value of = , a distance modulus of = , a metallicity of [Fe/H] = and an age of = . Our measurements allow us to confirm that NGC 1807 is not a physical cluster.
Key words: Galaxy: open clusters and associations: individual: NGC 1817 / techniques: photometric / methods: observational / Galaxy: open clusters and associations: individual: NGC 1807 / methods: data analysis
Figure [see full text] and Tables [see full text] and [see full text] are only available in electronic form at http://www.edpsciences.org
© ESO, 2004
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