来自局部观测的宇宙星形成历史及星系形成与演化概述
天体物理学
2009-11-10 v1
摘要
本次调查的目标是从局部观测中重建宇宙星形成率密度历史，从而获得关于星系如何形成和演化的见解。描述了一种新的化学演化模型，该模型考虑了全球星团的形成以及随之而来的场星的形成。当该模型与观察到的星团及场星的年龄-金属浓度关系相结合，并输入允许近乎普遍观察到的双峰分布全球星团形成时，这些星形成率即得以获得。通过仅关注局部宇宙的一个代表性体积，这些星形成率允许成功地重建马多报图，同时互补的结果同时满足许多局部宇宙学约束。 presented a physical framework for galaxy formation which incorporates the results from this chemical evolution model and assumes an anisotropic collapse. In addition to providing the 'classical' halo, bulge and disk components, the model also predicts a new stellar halo component with peak [Fe/H] ~ -0.8 and disk-like angular momentum and allows for the formation of a thick disk as outlined by the group of metal rich globular clusters. Milky Way counterparts of the latter two components are identified.
引用
@article{arxiv.astro-ph/0311333,
title = {Cosmic Star Formation History from Local Observations and an Outline for Galaxy Formation and Evolution},
author = {F. D. A. Hartwick},
journal= {arXiv preprint arXiv:astro-ph/0311333},
year = {2009}
}
备注
32 pages, 6 figs accepted by ApJ