论文标题
新的人口综合方法：限制恒星和乳酸物理的黄金路径
New population synthesis approach:The golden path to constrain stellar andgalactic physics
论文作者
论文摘要
欧洲航天局盖亚（Gaia）的基石任务揭示了银河系中的260 000个白矮人的特性，这使我们首次以大型样本来限制白矮人的演变。互补的调查（Corot，Kepler，K2，Apogee和Gaia-Eso）将彻底改变我们对银河系的形成和历史的理解，从而为跨不同的孤立式恒星种群的星星提供了准确的恒星质量，半径，距离，年龄，距离，距离，距离，化学特性。为了利用光谱，地震和天文观测的组合的潜力，种群合成方法是一种非常关键和有效的工具。我们开发了BesançonGalaxy模型（BGM，Lagarde等，2017），其中包括恒星进化预测，提供了沿着低和中间质量恒星进化的全局星空震中和表面化学丰度。 BGM首次可以探索在红色巨星（Lagarde等人的2019年）中发生的混合效果，从而改变其恒星特性。下一步是建模对巨星及其残余物（例如，白矮人）的一致治疗。这种改进将有助于我们限制恒星和银河发展。
The cornerstone mission of the European Space Agency, Gaia, has revealed properties of 260 000 white dwarfs in the Galaxy, allowing us for the first time to constrain the evolution of white dwarfs with a large sample. Complementary surveys (CoRoT,Kepler, K2, APOGEE andGaia-ESO), will revolutionize our understanding of the formation and history of our Galaxy, providing accurate stellar masses, radii, ages, distances, and chemical properties for very large samples of stars across different Galactic stellar populations. To exploit the potential of the combination of spectroscopic, seismic and astrometric observations, the population synthesis approach is a very crucial and efficient tool. We develop the Besançon Galaxy model (BGM, Lagarde et al.2017) for which stellar evolution predictions are included, providing the global asteroseismic properties and the surface chemical abundances along the evolution of low- and intermediate-mass stars. For the first time, the BGM can explore the effects of an extra-mixing occurring in red-giant stars (Lagarde et al.2019), changing their stellar properties. The nextstep is to model a consistent treatment of giant stars and their remnants (e.g., white dwarfs).This kind of improvement would help us to constrain stellar and Galactic evolutions.
