Deep HST-WFPC2 photometry of NGC 288. II. The Main Sequence Luminosity Function

Details Deep HST-WFPC2 photometry of NGC 288. II. The Main Sequence Luminosity Function Deep HST-WFPC2 photometry of NGC 288. II. The Main Sequence Luminosity Function

2002-02-08

arxiv.org/abs/astro-ph/0202176v1

Astronomy and Astrophysics

Astrophysics

16 pages, 6 .ps figures. Low resolution version of fig. 1; full resolution figure soon available at http://www.bo.astro.it/bap

Scientific paper

10.1086/340082

The Main Sequence Luminosity Function (LF) of the Galactic globular cluster NGC 288 has been obtained using deep WFPC2 photometry. We have employed a new method to correct for completeness and fully account for bin-to-bin migration due to blending and/or observational scatter. The effect of the presence of binary systems in the final LF is quantified and is found to be negligible. There is a strong indication of the mass segregation of unevolved single stars and clear signs of a depletion of low mass stars in NGC 288 with respect to other clusters. The results are in good agreement with the prediction of theoretical models of the dynamical evolution of NGC 288 that take into account the extreme orbital properties of this cluster.

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