Investigations of Binary Star Properties and Evolutionary Processes with the CHARA Array Interferometer

用 CHARA 阵列干涉仪研究双星特性和演化过程

• 批准号: 1411654
• 负责人: Douglas Gies
• 金额: $ 40.23万
• 依托单位: Georgia State University Research Foundation, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1411654&HistoricalAwards=false
• 关键词: Investigations; Binary; Star; Properties; Evolutionary

Long baseline optical interferometry allows measurement (and even imaging) of structure on smaller scales than can be obtained even with the largest ground-based telescopes. The investigators will continue to make excellent use of Georgia State's Center for High Angular Resolution Astronomy (CHARA) interferometer array on Mt. Wilson in California. This is the only long-baseline optical interferometer run by a university, so it provides a unique opportunity for student training in this state-of-the art technology. Results from this program will be featured in undergraduate classes at Georgia State and in the southern California public outreach efforts of the Mt. Wilson Institute.The proposal presents a three-part investigation that will use the CHARA optical long-baseline interferometer array to determine fundamental stellar and circumstellar properties of stars in close binary systems before, during, and after they interact and exchange mass. The high angular resolution provided by interferometry will permit them to measure the orbits of over 200 non-interacting spectroscopic binaries, which will allow direct determination of component masses and indirect determination of other physical parameters. They will also be able to image circumstellar material in binary stars that are currently exchanging material. Finally, they will search for the poorly-stuied donor stars in a carefully-selected sample of systems that have already undergone mass transfer.

长基线光学干涉测量法可以在比最大的地面望远镜更小的尺度上测量（甚至成像）结构。 研究人员将继续充分利用格鲁吉亚州高角分辨率天文学中心（CHARA）的干涉仪阵列。加州的威尔逊。 这是唯一一个由大学运行的长基线光学干涉仪，因此它为学生提供了一个独特的机会，让他们学习这项最先进的技术。 该计划的结果将在格鲁吉亚州和南部加州的公共宣传工作的本科课程中展出。该提议提出了一项由三部分组成的调查，将使用CHARA光学长基线干涉仪阵列来确定密近双星系统中恒星在相互作用和交换质量之前、期间和之后的基本恒星和星周性质。 干涉测量法提供的高角分辨率将使他们能够测量200多个非相互作用的光谱双星的轨道，这将允许直接确定组件质量和间接确定其他物理参数。 他们还将能够对目前正在交换物质的双星中的星周物质进行成像。 最后，他们将在一个精心挑选的已经经历过质量转移的系统样本中寻找研究不足的施主星。

项目成果

The Pre-He White Dwarf in the Post-mass Transfer Binary EL CVn

• DOI: 10.3847/1538-3881/ab52fa
• 发表时间: 2019-12
• 期刊: The Astronomical Journal
• 作者: Luqian 璐茜 Wang 王;D. Gies;K. Lester;Zhao Guo;R. Matson;G. Peters;V. Dhillon;T. Butterley;S. Li

A High Angular Resolution Survey of Massive Stars in Cygnus OB2: JHK Adaptive Optics Results from the Gemini Near-Infrared Imager

• DOI: 10.3847/1538-3881/aba536
• 发表时间: 2020-09-01
• 期刊: ASTRONOMICAL JOURNAL
• 影响因子: 5.3
• 作者: Caballero-Nieves, S. M.;Gies, D. R.;Turner, N. H.
• 通讯作者: Turner, N. H.