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Published July 1, 1980 | Published
Journal Article Open

PAL 12 - A metal-rich globular cluster in the outer halo


New optical and infrared observations ofseveral stars in the distant globular cluster Pal 12 show that they have CO strengths and heavy element abundances only slightly less than in M71, one of the more metal-rich globular clusters. Pal 12 thus has a metal abundance near the high end of the range over which globular clusters exist and lies in the outer galactic halo. Its red horizontal branch is not anomalous in view of the abundance we have found.

Additional Information

© American Astronomical Society • Provided by the NASA Astrophysics Data System. Received 1979 November 12; accepted 1980 January 7. Cerro Tololo Inter-American Observatory is supported by the National Science Foundation under Contract No. AST 78-27879. We are grateful to Barbara Zimmerman for help with the data analysis. We thank Fred Gillett for making the Mark I KPNO chopping secondary available for use at CTIO. Jay Elias assisted with the CTIO observations. This work was supported in part by NSF grant AST 77-20516 and NASA grant NGL 05L002-207.

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Published - 1980ApJ___239___74C.pdf


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