物态方程及类太阳模型计算
文献类型：学位论文
| 作者 | 赵承均 |
| 学位类别 | 硕士 |
| 答辩日期 | 2002 |
| 授予单位 | 中国科学院研究生院（云南天文台） |
| 授予地点 | 北京 |
| 导师 | 毕少兰 |
| 关键词 | 标准太阳模型 物态方程 非理想效应 |
| 其他题名 | Equation of State and the Computations of Solar-like Models |
| 学位专业 | 理论天体物理 |
| 中文摘要 | 物态方程是天体物理特别是恒星模型理论研究中的最重要的输入物理之一，与核反应率、不透明度共同构成恒星模型的三大要素。借助一定的恒星结构与演化程序，可以按要求构造各种假定的模型。研究理想状态下的物态方程相对简单，而且许多恒星物理领域对物态方程的要求并不高，一般也只需要假定为理想状态就可以满足研究要求了。但在一些特定的领域，以日震研究为例，高精度的观测资料需要有更细致的物理理论来加以解释。物态方程作为物理基础之一，也就要求其对物态有更为精确和完善的描述。在这种要求下，对物态方程特别是其非理想理论的研究同其它类似的基础理论一样，显得日益迫切。本论文以此为起点，首先对物态方程的研究历史和概貌作了比较详细的描述，并列举了现在国际上通用的几种物态方程。之后从化学图像出发，在最小自由能基础上对物态方程的非理想效应、特别是各种带电粒子之间的库仑耦合作用进行了分析讨论。论文的最后将这种修正效应应用到类太阳模型中进行了初步检验，通过对多个模型的计算结果进行对照，分析了由库仑相互作用带来的对小质量恒星结构的影响，从理论和实际应用上都验证了改进后的物态方程的合理性。 |
| 英文摘要 | As one of the most important input physics in the study of astrophysics, especially that of stellar model construction theory, Equation of state, together with nuclear-energy generation rate and opacity, is in the three basic ingredients that are required in stellar models. With the help of a certain stellar structure and evolution code, one can construct his own desired stellar model. Equation of state of an ideal gas is more simple and, for many astrophysical applications, crude recipes for tlie equation of state are quite adequate (e.g. an equation of state of an ideal gas.). However, in certain circumstances, for example, in heliosiesmology researches, high-quality helioseismological data require more elaborated theories to interpret and so, as a basic physical theory, equation of state itself has to describe more detailed and complicated states. For this purpose, work in equation of state as well as such like basic theories, especially in its non-ideal effects, becomes more and more pressing and useful. From the above viewpoint, this thesis first takes good time in surveying the history of equation of state and describing its general profile, with individual discussions of some useful versions of equation of state in stellar model theory at present. Then from the so called chemical picture standpoint with the basic physical technique of free-energy minimization, a detailed treatment in non-ideal effects of equation of state, particularly in Coulomb interactions between charged particles, is presented. In the last part of this thesis, such corrections are taken into solar-like models to be tentatively evaluated and tested. In the results, by comparing and analyzing the following corrections from the non-ideal Coulomb interactions to the structures of low-mass stars, the correctness of this improved equation of state has been theoretically and practically verified. |
| 学科主题 | 天文学 |
| 语种 | 中文 |
| 公开日期 | 2016-05-03 |
| 页码 | 65 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5315]  |
| 专题 | 云南天文台_恒星物理研究组 |
| 推荐引用方式 GB/T 7714 | 赵承均. 物态方程及类太阳模型计算[D]. 北京. 中国科学院研究生院（云南天文台）. 2002. |
入库方式： OAI收割
来源：云南天文台
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