EDP Sciences
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Volume 400, Number 3, March IV 2003
Page(s) 917 - 921
Section Stellar clusters and associations
DOI http://dx.doi.org/10.1051/0004-6361:20030069

A&A 400, 917-921 (2003)
DOI: 10.1051/0004-6361:20030069

The Small Magellanic Cloud star cluster NGC 458. A new UBVI photometric study

G. Alcaino1, F. Alvarado1, J. Borissova2 and R. Kurtev3

1  Isaac Newton Institute of Chile, Ministerio de Educacion de Chile, Casilla 8-9, Correo 9, Santiago, Chile
    e-mail: inewton@terra.cl
2  Institute of Astronomy, Bulgarian Academy of Sciences and Isaac Newton Institute of Chile Bulgarian Branch, 72 Tsarigradsko chaussèe, 1784 Sofia, Bulgaria
    e-mail: jborisso@astro.puc.cl
3  Department of Astronomy, Sofia University and Isaac Newton Institute of Chile Bulgarian Branch, 1164 Sofia, Bulgaria
    e-mail: kurtev@phys.uni-sofia.bg

(Received 16 August 2002 / Accepted 7 January 2003 )

We present a new photometry of the Small Magellanic Cloud star cluster NGC 458 in UBVI filters. We determine the reddening $E(B-V)=0.04\pm0.02$. By comparison with the isochrones by Bertelli et al. (1994) we derive an age of $\approx$140 Myr. Three candidate blue straggler stars are proposed. The evolved "blue loop" stars of NGC 458 have masses between 4 and 5 $\cal M_\odot$ and are hotter than model predictions.

Key words: stars: Hertzsprung-Russell (HR) and C-M diagrams -- galaxies: stellar content -- galaxies: Magellanic clouds -- galaxies: individual: SMC -- galaxies: stars clusters

Offprint request: R. G. Kurtev, kurtev@phys.uni-sofia.bg

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