Astron. Astrophys. 324, 549-555 (1997)

Deep UBVRI photometry in IC 348 ^{* **}

E. Trullols ^{1, 2} and C. Jordi <sup>2

1</sup> Departament de Matemàtica Aplicada i Telemàtica, Universitat Politècnica de Catalunya, Avda. Victor Balaguer s/n, E-08800 Vilanova i la Geltrú, Spain
² Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain

Received 5 August 1996 / Accepted 10 December 1996

Abstract

Deep UBVRI -CCD Johnson photometry for 123 stars in the densest region of IC 348 open cluster were obtained during three observational runs (October 1992, December 1993 and December 1994) at Calar Alto (Almería, Spain). Colour-colour and colour-magnitude diagrams allowed us to classify 114 stars as members of the cluster and to confirm a large presence of pre-main sequence stars. Individual reddening values were computed for the brightest members. The structure and sub-clustering were discussed and a new sub-cluster was identified. On the assumption that all the stars in the cluster were born at the same time, an age of 3-7 10⁶ yr was derived from PMS evolutionary models for low mass stars.

Key words: open clusters and associations: individual: IC 348 stars: fundamental parameters stars: pre-main sequence HR diagram

* Based on observations made at the Centro Astronómico Hispano-Alemán and the Observatorio Astronómico Nacional in Calar Alto, Almería, Spain
** Tables 3 and 5 are only available in electronic form from CDS via anonymous ftp 130.79.128.5, and by e-mail request to E. Trullols at enric@mat.upc.es

Send offprint requests to: E. Trullols

© European Southern Observatory (ESO) 1997

Online publication: May 26, 1998

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