A Study of Oxygen Abundances in Giant Stars in Globular Clusters

球状星团巨星氧丰度的研究

• 批准号: 8720738
• 负责人: Robert Kraft
• 金额: $ 6.19万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-04-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720738&HistoricalAwards=false
• 关键词: Study; Oxygen; Abundances; Giant; Stars

Kraft will observe and analyze spectra of about a dozen giant stars in each of six globular clusters. The goal is a better determination of the oxygen abundance in these stars. The observations have become possible with the advent of the Hamilton spectrograph at the 3-meter telescope of Lick Observatory. Most of the award supports a named graduate student. Globular star clusters were formed at the time when our Galaxy was formed. Their observation can inform us of the elements present at that time and the formation of the elements since then by stars in our Galaxy. Oxygen is one of the elements made in stars and an element that is most important both for the evolution of aging stars and for chemistry everywhere. For the first time, new observational facilities permit a reliable measurement of the oxygen abundance in giant stars within globular star clusters. Kraft and a graduate student will obtain such measurements and evaluate the oxygen abundances for stars in six globular star clusters.

克拉夫特将观察和分析大约12个巨大的 六个球状星团中的每一个。 我们的目标是更好地 确定这些恒星中的氧丰度。 的 随着汉密尔顿望远镜的出现， Lick天文台3米望远镜上的摄谱仪。 最 该奖项支持一个有名的研究生。 球状星星团形成于银河系 形成了 他们的观察可以告诉我们 以及从那时起由恒星形成的元素 在我们的银河系 氧是恒星中的一种元素， 一种对衰老的进化 星星和化学无处不在。 第一次，新 观测设施可以可靠地测量 球状星星团中巨星的氧丰度。 卡夫和一名研究生将获得这样的测量结果， 估算六颗球状星星的氧丰度 集群