论文标题
GAIA-ESO调查：热星光谱的分析
The Gaia-ESO Survey: The analysis of the hot-star spectra
论文作者
论文摘要
Gaia-Eso调查（GES）是一项庞大的公共光谱调查，在6年的时间内收集了〜10^5星的光谱。这项调查不仅提供了降低的光谱，还提供了由于光谱分析而产生的恒星参数和丰度。 GES数据流在19个工作组中组织。工作组13（WG13）负责对最热的恒星（O，B和A类型，具有正式的TEFF> 7000 K）的光谱分析，这些恒星被观察到GES的一部分。我们介绍已应用于还原光谱的过程和技术，以确定这些恒星的恒星参数和丰度。所使用的过程类似于GES中的其他工作组。许多组（称为“节点”）每个组都使用其最新技术和代码独立分析光谱。 WG13中分析的特异性是覆盖的较大温度范围（TEFF = 7000-50,000 K），需要使用不同的分析代码。因此，大多数节点只能处理部分数据。通过将它们与基准恒星进行比较，并将其与另一个节点进行比较，将质量检查应用于这些节点的结果。对于每个恒星，然后将节点值匀浆为一个结果：推荐的参数和丰度。每个数据（一部分）数据分别分析了八个节点。总共分析了6462颗恒星的17,693个光谱，其中大多数在37个开放式恒星簇中。均质化导致了5584星的出色参数。确定恒星数量更高的丰度。研究的元素是他，C，N，O，NE，MG，AL，SI和SC。确定了292颗恒星的至少一个元素的丰度。这里分析的热星数据以及GAIA-ESO调查数据将在未来的恒星进化和开放群集的研究中大量使用。
The Gaia-ESO Survey (GES) is a large public spectroscopic survey that has collected, over a period of 6 years, spectra of ~ 10^5 stars. This survey provides not only the reduced spectra, but also the stellar parameters and abundances resulting from the analysis of the spectra. The GES dataflow is organised in 19 working groups. Working group 13 (WG13) is responsible for the spectral analysis of the hottest stars (O, B and A type, with a formal cut-off of Teff > 7000 K) that were observed as part of GES. We present the procedures and techniques that have been applied to the reduced spectra, in order to determine the stellar parameters and abundances of these stars. The procedure used is similar to that of other working groups in GES. A number of groups (called `Nodes') each independently analyse the spectra, using their state-of-the-art techniques and codes. Specific for the analysis in WG13 is the large temperature range that is covered (Teff = 7000 - 50,000 K), requiring the use of different analysis codes. Most Nodes can therefore only handle part of the data. Quality checks are applied to the results of these Nodes by comparing them to benchmark stars, and by comparing them one to another. For each star the Node values are then homogenised into a single result: the recommended parameters and abundances. Eight Nodes each analysed (part of) the data. In total 17,693 spectra of 6462 stars were analysed, most of them in 37 open star clusters. The homogenisation led to stellar parameters for 5584 stars. Abundances were determined for a more limited number of stars. Elements studied are He, C, N, O, Ne, Mg, Al, Si and Sc. Abundances for at least one of those elements were determined for 292 stars. The hot-star data analysed here, as well as the Gaia-ESO Survey data in general, will be of considerable use in future studies of stellar evolution and open clusters.
