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.

长基线光学干涉法可以在较小的尺度上测量（甚至成像），即使使用最大的地面望远镜也可以获得。 调查人员将继续在加利福尼亚州威尔逊山上很好地利用佐治亚州立大学高压分辨率天文学中心（CHARA）干涉仪阵列。 这是大学运行的唯一长基线光学干涉仪，因此为这项最先进的技术提供了一个独特的机会。 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. 干涉法提供的高角度分辨率将使他们能够测量超过200多个非相互作用的光谱二进制轨道，这将允许直接确定组件质量并间接确定其他物理参数。 他们还将能够在目前正在交换材料的二进制恒星中成像。 最后，他们将在已经经过质量转移的系统样本中搜索较差的供体恒星。

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.