For S Scuti variables in stellar systems the shorter the average period is, the lower the metallicity and the older the age of the stellar system are. 恒星系统内变星的平均周期越短系统的年龄越大,金属丰度也越低。
At a given mass, the higher metallicity favors the nucleosynthesis of Pb. 对给定恒星初始质量情况,较高的金属丰度有利于铅元素的核合成。
Metallicity is a fundamental parameter to trace the formation and evolution of galaxies. 金属丰度是表征星系特征的重要参量,对于理解星系的形成与演化具有重要意义。
Metallicity distribution of open clusters and abundance gradient of the Galactic disc 疏散星团金属丰度样本和银盘金属丰度梯度
In this thesis, we study the relation between the critical accretion rate and the metallicity via AGB stars approach. 在本文中我们通过AGB星研究了此临界吸积率和金属丰度之间的关系。
G Dwarfs Metallicity Distribution in the Solar Neighbourhood and the Chemical Evolution 太阳附近G矮星金属含量分布和化学演化
Metallicity vs Rotation Velocity in Late-Type Galaxies 晚型星系金属丰度与自转速度的关系
Carrying out a series of Monte-Carlo simulations, the works of orbital elements of binaries are recalculated considering the influence of initial metallicity on S-process nucleosynthesis of intrinsic AGB stars, and here we adopt wind accretion scenario with the total angular momentum conservation. 本文采用星风质量吸积的角动量守恒模型,并考虑到初始金属丰度对AGB星s-过程核合成的影响,用Monte-Carlo方法研究了弱钡星系统和强钡星系统的轨道根数的变化规律。
As the evolution result of lower metallicity AGB stars, lead stars have not only the common property of AGB stars but also their unique property, because the initial mass and the initial metallicity of lead stars need to satisfy some condition. 铅星作为低金属丰度AGB星的演化产物,由于其初始质量、初始金属丰度需要满足一定条件,因此演化过程既具有AGB星演化的共性,又具有其自身的特性。
Age-Metallicity Relation of Stars in the Galactic Thick Disk 银河系厚盘恒星的年龄-金属度关系
Metallicity and Star Formation History of Globular Clusters 球状星团的金属丰度特征与其恒星形成史
The average values of metallicity in the disk, the halo, and Galactic bulge are-0.2,-1.6, and-0.2 dex respectively. 银河系的银盘、银晕、核球的平均金属丰度为-0.2,-1.6,-0.2。
The relation between the initial and final mass of a AGB star with different metallicity and the influence of the initial mass and metallicity to AGB star's overlap factor were got through modeling the evolution of AGB stars. 通过对AGB星演化的模拟,得到在不同金属丰度下的AGB星的初终质量关系及初始质量和初始金属丰度对AGB星重叠因子的影响。
The Variation of the Heavy element Abundances in Metal poor Stars with the Metallicity 恒星重元素丰度随金属丰度的变化规律
This thesis points out the defects of the present definition of metallicity, and sets forth certain new understanding on metallicity. 文章指出现时对金属性定义的缺陷,并提出了对金属性的新认识。
Emphasizes the distinguishment of elementary metallicity from metallic activity of elements which should be respectively measured by ionization potential and free energy change of reaction ( or standard electrode potential). 强调要把元素的金属性与单质的金属性活动性区分开,并分别用电离势和反应的自由能变化(或标准电极电势)来衡量。
Age and metallicity are the most important parameters for stellar populations, but they are often found to be degenerated. 年龄和金属丰度是星族的两个重要参数,但两者相互简并。
The presence of the defect states result in the metallicity of the nanotube. 缺陷态的存在导致纳米管从电子结构性质上看呈现出金属性。
Different from the zigzag structure, the armchair type graphene shows the unique property of the metallicity or semiconductor characteristics in terms of the number of the edge atomics. 与锯齿型石墨烯相比,扶手型石墨烯具有随边缘原子个数可表现出金属性或半导体特征的独特性质。