A cosmological study of the star formation history in the solar neighbourhood
A cosmological study of the star formation history in the solar neighbourhood
复制标题
太阳邻域恒星形成历史的宇宙学研究
DOI：
10.1046/j.1365-8711.2001.04723.x
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发表时间：
2001
影响因子：
4.8
通讯作者：
C. Firmani
中科院分区：
文献类型：
--
作者：
X. Hernández;V. Avila;C. Firmani
我们使用宇宙学的星系演化方法来模拟银河系。包括一个详细的治疗的质量聚集和动力学历史的不断增长的暗晕，连同自洽的物理治疗的星星形成过程中不断增长的星系盘。这使我们能够计算的时间演化的星星和气体的表面密度在所有银河系半径，特别是星星形成历史（SFH）在太阳半径。大范围的宇宙学质量聚集历史（MAH）能够产生一个具有今天银河系性质的星系。由此产生的太阳近邻SFH涵盖了该特征的可用观测数据，最可能的MAH与这些观测结果进行了最佳比较。我们还发现，我们的银河系的旋转曲线意味着在其暗物质晕中存在一个恒定密度的核心。
We use a cosmological galactic evolutionary approach to model the Milky Way. A detailed treatment of the mass aggregation and dynamical history of the growing dark halo is included, together with a self consistent physical treatment for the star formation processes within the growing galactic disc. This allows us to calculate the temporal evolution of star and gas surface densities at all galactic radii, in particular, the star formation history (SFH) at the solar radius. A large range of cosmological mass aggregation histories (MAHs) is capable of producing a galaxy with the present day properties of the Milky Way. The resulting SFHs for the solar neighbourhood bracket the available observational data for this feature, the most probable MAH yielding the optimal comparison with these observations. We also find that the rotation curve for our Galaxy implies the presence of a constant density core in its dark matter halo.