The luminosity function of the Large Magellanic Cloud globular cluster NGC 1866

Details The luminosity function of the Large Magellanic Cloud globular cluster NGC 1866 The luminosity function of the Large Magellanic Cloud globular cluster NGC 1866

2003-02-21

arxiv.org/abs/astro-ph/0302458v1

Astronomy and Astrophysics

Astrophysics

AJ accepted, 16 pages, 19 figures, uses aastex.cls

Scientific paper

10.1086/374946

We present {\it Hubble Space Telescope} {\it V,I} photometry of the central region of the LMC cluster NGC 1866, reaching magnitudes as faint as V=27 mag. We find evidence that the cluster luminosity function shows a strong dependence on the distance from the cluster center, with a clear deficiency of low luminosity stars in the inner region. We discuss a {\it global} cluster luminosity function as obtained from stars in all the investigated region, which appears in impressive agreement with the prediction from a Salpeter mass distribution. We also revisit the use of NGC 1866 as a probe for determining the efficiency of core overshooting, and conclude that a definitive answer to this question is not possible from this cluster.

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