POLLUX：合成恒星光谱数据库
POLLUX : a database of synthetic stellar spectra
摘要：
合成光谱需要确定所有类型恒星的基本恒星和风参数。它们也被用于理论光谱库的构建，有助于恒星星族的合成。因此，需要一个理论光谱数据库，以便与光谱数据进行快速和定量的比较。我们提供了这样一个数据库，提供了前所未有的覆盖整个赫兹-罗素图。我们提出了POLLUX数据库的合成恒星光谱。对于Teff <6000 K的天体，用MARCS大气模型计算，并由TURBOSPECTRUM程序提供合成谱。ATLAS 12模型计算了7000 K <Teff <15000 K的恒星。SYNSPEC给出了相应的光谱。最后，CMFGEN代码提供了最热恒星（Teff > 25 000 K）的大气模型。它们的光谱是用CMF_FLUX计算的。给出了在3000 ~ 12000 A范围内的高分辨率（R> 150000）光谱和从紫外到近红外的光谱能量分布。这些光谱覆盖了太阳金属丰度的HR图。我们提出了各种各样的合成光谱的各种类型的恒星的格式，是符合虚拟天文台标准。一个用户友好的网络界面允许一个简单的光谱选择和数据检索。未来的发展将包括扩展到大范围的金属丰度和近红外高分辨率光谱，以及更好地覆盖HR图，包括沃尔夫-拉叶星的模型和冷星的大型数据集。POLLUX数据库可在http://pollux.graal.univ-montp2.fr/上和通过虚拟天文台进入。
英文摘要：
Synthetic spectra are needed to determine fundamental stellar and wind parameters of all types of stars. They are also used for the construction of theoretical spectral libraries helpful for stellar population synthesis. Therefore, a database of theoretical spectra is required to allow rapid and quantitative comparisons to spectroscopic data. We provide such a database offering an unprecedented coverage of the entire Hertzsprung-Russell diagram. We present the POLLUX database of synthetic stellar spectra. For objects with Teff < 6 000 K, MARCS atmosphere models are computed and the program TURBOSPECTRUM provides the synthetic spectra. ATLAS12 models are computed for stars with 7 000 K <Teff <15 000 K. SYNSPEC gives the corresponding spectra. Finally, the code CMFGEN provides atmosphere models for the hottest stars (Teff > 25 000 K). Their spectra are computed with CMF_FLUX. Both high resolution (R>150 000) optical spectra in the range 3 000 to 12 000 A and spectral energy distributions extending from the UV to near--IR ranges are presented. These spectra cover the HR diagram at solar metallicity. We propose a wide variety of synthetic spectra for various types of stars in a format that is compliant with the Virtual Observatory standards. A user--friendly web interface allows an easy selection of spectra and data retrieval. Upcoming developments will include an extension to a large range of metallicities and to the near--IR high resolution spectra, as well as a better coverage of the HR diagram, with the inclusion of models for Wolf-Rayet stars and large datasets for cool stars. The POLLUX database is accessible at http://pollux.graal.univ-montp2.fr/ and through the Virtual Observatory.
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