Chemical abundances in tidally disrupted globular clusters

被引：0

作者：

Yong, D. ^{[1
]}

Melendez, J. ^{[2
]}

Cunha, K. ^{[3
]}

Karakas, A. I. ^{[1
]}

Norris, J. E. ^{[1
]}

Smith, V. V. ^{[3
]}

机构：

[1] Australian Natl Univ, Mt Stromlo Observ, Canberra, ACT, Australia

[2] Univ Porto, Ctr Astrofis, Oporto, Portugal

[3] Natl Opt Astron Observ, Tucson, AZ 85726 USA

来源：

STAR CLUSTERS: BASIC GALACTIC BUILDING BLOCKS THROUGHOUT TIME AND SPACE | 2010年 / 266期

关键词：

Galaxy: abundances; globular clusters: individual (NGC 5466; NGC; 6712); stars: abundances; FLUORINE ABUNDANCES; GIANT STARS; NGC; 6712; NUCLEOSYNTHESIS; NGC-6752;

D O I：

10.1017/S1743921309991001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present abundance measurements in the tidally disrupted globular cluster NGC 6712. In this cluster, there are large star-to-star variations of the light elements C, N, O, F and Na. While such abundance variations are seen in every well-studied globular cluster, they are not found in field stars and indicate that clusters like NGC 6712 cannot provide many field stars and/or field stars do not form in environments with chemical-enrichment histories like those of NGC 6712. Preliminary analysis of NGC 5466, another tidally disrupted cluster, suggests little (if any) abundance variation for 0 and Na and the abundance ratios [X/Fe] are comparable to field stars at the same metallicity. Therefore, globular clusters like NGC 5466 may have been Galactic building blocks.

引用

页码：157 / +

页数：2

共 19 条

[1] The discovery of tidal tails around the globular cluster NGC 5466 [J].