Young Galactic globular clusters II. The case of Palomar 12

(2) University of Padova; (3) Padova Astronomical Observatory); A. Rosenberg (1); E.V. Held (3) ((1) Telescopio Nazionale Galileo; G. Piotto (2); I. Saviane (2)

arxiv: astro-ph/9809112 · v1 · submitted 1998-09-09 · 🌌 astro-ph

Young Galactic globular clusters II. The case of Palomar 12

A. Rosenberg (1) , I. Saviane (2) , G. Piotto (2) , E.V. Held (3) ((1) Telescopio Nazionale Galileo , (2) University of Padova , (3) Padova Astronomical Observatory) This is my paper

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keywords clusterclustersgalacticglobularobtainedpalomarbelowbranch

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We present broadband V,I CCD photometry for ca. 1700 stars towards the Galactic globular cluster Palomar 12, covering a field of 10.7' x 10.7'. From these data, a color-magnitude diagram from the red giant branch tip to ca. 2 mag below the cluster's turn-off is obtained. From a comparison with the color magnitude diagrams of 47 Tuc and M5, and using different theoretical models, we confirm that Pal 12 is younger, finding an age 68% +/- 10% that of both template clusters. Revised structural parameters are also obtained: r(c) = 37.8 +/- 0.6 and c = 1.08 +/- 0.02.

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Young Galactic globular clusters II. The case of Palomar 12

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