The effects of induced star formation on the evolution of the galaxy. II - The galactic ecosystem
The effects of induced star formation on the evolution of the galaxy. II - The galactic ecosystem
复制标题
诱导恒星形成对星系演化的影响。
DOI：
10.1086/160664
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
S. Shore
中科院分区：
文献类型：
--
作者：
S. Shore
本文将确定性动力系统方法推广到具有星诱导星星形成的盘星系的情形。结果表明，刚性旋转的轴对称和非轴对称的情况下，差分旋转星系模型可以明确地解决。与随机模拟的结果进行了比较。发现了一个从活动区中心向外传播的星星形成波，并对该星星形成波的速度和性质进行了研究。本文还提出了一个具有时滞的两相模型，该模型可用于模拟连续的星星形成过程。在这种情况下，临界初始气体和星星分数。最后，简要讨论了单区模型的随机推广的两相星系有和没有落。
The deterministic dynamical systems approach of Paper I is here generalized to the case of a disk galaxy with star-induced star formation. It is shown that the cases of a rigidly rotating axisymmetric and nonaxisymmetric, and a differentially rotating galaxy model can be solved explicitly. The results are compared with stochastic simulations. A wave of star formation, propagating outward from the central portion of an active region, is found. The velocity and properties of this star formation front are examined. A two-phase model with time delays is also presented, which can be used for modeling sequential star formation. In this case, critical initial gas and star fractions are presented. Finally, a brief discussion is presented of the stochastic generalization of the one-zone model for a two-phase galaxy with and without infall.