The Composition of the Bulge Globular Cluster NGC 6273

被引：0

作者：

Pilachowski, C. A. ^{[1
]}

Johnson, C. I. ^{[2
]}

Rich, R. M. ^{[3
]}

Caldwell, N. ^{[2
]}

Mateo, M. ^{[4
]}

Bailey, J. I., III ^{[4
]}

Crane, J. D. ^{[5
]}

机构：

[1] Indiana Univ, Dept Astron SW319, 727 E 3rd St, Bloomington, IN 47405 USA

[2] Harvard Smithsonian Ctr Astrophys, 60 Garden St MS 15, Cambridge, MA 02138 USA

[3] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[4] Univ Michigan, Ann Arbor, MI 48109 USA

[5] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA

来源：

FORMATION, EVOLUTION, AND SURVIVAL OF MASSIVE STAR CLUSTERS | 2017年 / 12卷 / S316期

基金：

美国国家科学基金会;

关键词：

globular clusters: individual (NGC 6273); stars: abundances; ABUNDANCE VARIATIONS; IRON;

D O I：

10.1017/S1743921316011790

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Observations of red giants in the Bulge globular cluster NGC 6273 with the Michigan/Magellan Fiber System (M2FS) mounted on the Nasmuth-East port of the Magellan-Clay 6.5-m telescope at the Las Campanas Observatory reveal a spread in metallicity. Members have been confirmed with radial velocity. NGC 6273 has at least two populations separated by 0.2-0.3 dex in [Fe/H]. The sodium and aluminum abundances are correlated while the magnesium and aluminum abundances are anti-correlated. The cluster also shows a rise in the abundance of the s-process element lanthanum with [Fe/H] similar to other massive clusters. The cluster contains a possible third population depleted in most elements by 0.3dex.

引用

页码：341 / 342

页数：2

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