Direct determination of effective temperatures for calibrators in the Gaia mission and the Gaia-ESO-Survey

直接确定盖亚任务和盖亚-欧洲南方天文台巡天中校准器的有效温度

• 批准号: 320160824
• 负责人: Dr. Iva Karovicova, Ph.D.
• 金额: --
• 依托单位: Institute of Astronomy
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/320160824?language=en
• 关键词: Direct; determination; effective; temperatures; calibrators

The overall research aim of the project is to assist in delivering precise atmospheric parameters of stars observed by large stellar surveys of the Milky Way, e.g., the astrometric space mission Gaia and its plethora of ground-based complementary surveys. We obtained interferometric observations of stars that are used as calibrating standards in the Gaia mission and the Gaia-ESO Survey. The interferometric observations provide precise measurements of angular diameters, and deliver accurate direct determination of effective temperatures that are independent of traditional spectroscopic and photometric techniques. The scientific goal of the research visit is the data reduction and analysis of the obtained interferometric observations. The results will be used for deriving effective temperatures. The directly determined effective temperatures are necessary for testing and improving stellar-atmosphere models and synthetic spectra that are required for the correct assessment of the atmospheric parameters of the Gaia-ESO and Gaia sources. The project will be accomplish in close collaboration with the Gaia-ESO Public Spectroscopic Survey, together with the Gaia-ESO Survey members at the Institute of Astronomy in Cambridge (host institute).

该项目的总体研究目标是协助提供银河系大型恒星巡天观测到的恒星的精确大气参数，例如，天文测量空间使命盖亚及其大量的地面补充调查。我们获得的恒星的干涉观测结果被用作盖亚使命和盖亚-ESO调查的校准标准。干涉观测提供了角直径的精确测量，并提供了独立于传统光谱和光度技术的有效温度的精确直接测定。研究访问的科学目标是对获得的干涉测量观测数据进行数据整理和分析。结果将用于推导有效温度。直接确定的有效温度对于测试和改进正确评估盖亚-ESO和盖亚源的大气参数所需的恒星大气模型和合成光谱是必要的。该项目将与Gaia-ESO公共光谱调查密切合作，并与剑桥天文学研究所（主办机构）的Gaia-ESO调查成员一起完成。