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

Cohen, J. G. and Frogel, Jay A. and Persson, S. E. and Zinn, R. (1980) PAL 12 - A metal-rich globular cluster in the outer halo. Astrophysical Journal, 239 . pp. 74-77. ISSN 0004-637X. doi:10.1086/158090.

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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.

Item Type:Article
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Cohen, J. G.0000-0002-8039-4673
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.
Funding AgencyGrant Number
NSFAST 78-27879
NSFAST 77-20516
NASANGL 05L002-207
Subject Keywords:clusters : globular — stars : abundances — stars : evolution
Record Number:CaltechAUTHORS:20190531-091630056
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95966
Deposited By: George Porter
Deposited On:31 May 2019 19:51
Last Modified:16 Nov 2021 17:17

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