The Gaia -ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
The Gaia -ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
复制标题
盖亚 -ESO 公共光谱调查：动机、实施、GIRAFFE 数据处理、分析和最终数据产品
DOI：
10.1051/0004-6361/202243134
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发表时间：
2022
影响因子：
6.5
通讯作者：
Gilmore G
中科院分区：
文献类型：
--
作者：
Gilmore G
背景盖亚-欧洲南方天文台公共光谱调查是一个雄心勃勃的项目，旨在获取10万颗恒星的天体物理参数和元素丰度，其中包括银河系中具有代表性的大样本恒星群，以及一个由60个(外加20个档案)开放星团组成的定义明确的样本。我们提供内部一致的结果，是根据基准恒星和星团校准的，覆盖了非常广泛的丰度和年龄范围。这提供了一个具有内在价值的遗留数据集，同时也提供了一个范围广泛的大型数据集，对于其他和未来的恒星调查和盖亚天体物理参数的均质化具有价值。目的本文概述了调查方法、科学目标和实施，包括描述长颈鹿光谱的数据处理。随附的一篇论文介绍了调查结果。方法盖亚-ESO致力于量化随机和系统对测量不确定度的贡献。因此，所有可用的光谱分析技术都得到了利用，每个光谱分析都由多达几个不同的分析管道进行分析，并做出了相当大的努力来均化和校准所产生的参数。我们在这里描述了将处理后的数据产品交付到ESO科学档案馆供公开使用的活动序列。结果GAIA-ESO调查在2011年12月至2018年1月期间从长颈鹿和UVE分配的340个VLT夜晚获得了115 000颗恒星的202 000个光谱。结论完整的最终光谱数据集一致减少，于2020年底通过ESO科学档案馆发布，完整的天体物理参数集将于2022年发布。随附的一篇文章回顾了调查的实施、科学要点、开放的集群调查和数据产品。
ContextThe Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to obtain astrophysical parameters and elemental abundances for 100 000 stars, including large representative samples of the stellar populations in the Galaxy, and a well-defined sample of 60 (plus 20 archive) open clusters. We provide internally consistent results calibrated on benchmark stars and star clusters, extending across a very wide range of abundances and ages. This provides a legacy data set of intrinsic value, and equally a large wide-ranging dataset that is of value for the homogenisation of other and future stellar surveys andGaia'sastrophysical parameters.AimsThis article provides an overview of the survey methodology, the scientific aims, and the implementation, including a description of the data processing for the GIRAFFE spectra. A companion paper introduces the survey results.MethodsGaia-ESOaspires to quantify both random and systematic contributions to measurement uncertainties. Thus, all available spectroscopic analysis techniques are utilised, each spectrum being analysed by up to several different analysis pipelines, with considerable effort being made to homogenise and calibrate the resulting parameters. We describe here the sequence of activities up to delivery of processed data products to the ESO Science Archive Facility for open use.ResultsThe Gaia-ESO Survey obtained 202 000 spectra of 115 000 stars using 340 allocated VLT nights between December 2011 and January 2018 from GIRAFFE and UVES.ConclusionsThe full consistently reduced final data set of spectra was released through the ESO Science Archive Facility in late 2020, with the full astrophysical parameters sets following in 2022. A companion article reviews the survey implementation, scientific highlights, the open cluster survey, and data products.