Being the biggest bound systems of celestial objects,galaxy clusters are of particular importance for studies of galaxy formation,dynamical evolution of galaxies and the large scale structure of the universe.
对星系团各类分层效应的有关问题做了概要的评述,包括成员星系在位置空间和(或)速度空间中的形态分层、光度(质量)分层和元素丰度分层的表现形式和探测途径,分层效应可能的形成机制及其对星系和星系团的结构和演化的影响。
The star formation properties of 184 galaxies in the galaxy cluster Abell 2255 are studied.
研究了星系团Abell 2255中184颗成员星系的恒星形成性质。
This thesis will mainly focus on the lensing properties of N-body simulated galaxy clusters.
随后讨论了一个真实的N体数值模拟的星系团里的子结构和噪音对强引力透镜的影响。
We have derived the luminosity functions (LFs) of 198 member galaxies in the central region of the nearby cluster of galaxies Abell 2634 in the B,V and R bands.
我们得到了邻近星系团Abell2634中心区域的198颗成员星系在B、V、R三个波段的光度函数,并且分别用Schechter函数和Gaussian函数及其组合进行了拟合。
The merging cluster of galaxies A2255 is covered by the Sloan Digital Sky Survey (SDSS).
处于并合中的星系团A2255正好被Sloan Digital Sky Survey(SDSS)巡天覆盖。
Scaling Argument for the Cluster Correlation Functions;
星系团相关函数的标度关系
The Star Formation Properties of Galaxy Cluster Abell 2199;
星系团Abell 2199的恒星形成性质
By comparing the physical parameters of cluster and field galaxies,such as concentration index,specific star formation rate,stellar mass,and metallicity,the star formation properties of galaxies within different gravitational environments are studied.
研究表明,聚度高的星系主要居于星系团中,大部分低质量星系是场星系,星系的特征恒星形成率与恒星质量和金属丰度之间存在着显著的相关。
We find that richer clusters (R≥ 2) show more apparent large-scale "dusting" properties than poorer (R = 1) clusters.
运用团分析法分别研究了不同富性的星系团子样本二维分布的几何结构。
Dynamics of the Nearby Rich Cluster of Galaxies for the Member Galaxies of Abell 2199;
邻近富星系团Abell 2199成员星系动力学
The Luminosity Function for the Member Galaxies and the Dynamics of the Clusters;
星系团成员星系光度函数及其动力学
But we see mostly one large intervening cluster of galaxies, called the Virgo Cluster.
但是我们只看到一团相互作用的星系，成为室女座星系团。
Strong Lensing in N-body Simulated Clusters;
多体模拟星系团中的强引力透镜现象
Study of High Energy Astrophysical Processes in Galaxy Clusters and Black Holes;
星系团与黑洞高能天体物理过程研究
Study on Dynamics and Morphology of Cluster of Galaxies Abell 1795
星系团Abell 1795的形态和动力学研究
The surface density of galaxies in a cluster can be measured from photographs.
一个星系团中星系的表面密度可从其照片上测得。
If one counts distant clusters in the absence of a nearby cluster, one evaluates the first term.
如果我们在没有邻近星系团的情形下计数遥远的星系团，则可得出第一因子。
Sometimes these clusters collide and merge with one another.
有时，这些星系团之间会发生碰撞，并合二为一。
Galactic nebulas are masses of diffuse material within our galaxy.
银河星云是我们星系中的一团团弥散物。
Smaller groups of stars called globular clusters often surround spiral galaxies.
称作球状星团的小型恒星团体经常环绕在旋涡星系周围。
Normal matter in galaxy clusters is mostly in the form of hot gas and stars.
星系群中的常态物质大概是由热气团和星团所组成的。
Shara's research interests include stellar collisions, novae and supernovae, and the populations of stars that inhabit star clusters and galaxies.
夏拉的研究兴趣包括恒星碰撞、星与超新星，以及星团和星系内恒星的数目分布。
How could we be sure that these globularlike clusters really were younger versions of the globulars in our own galaxy?
我们如何能确定这些类球状星团就是我们星系里球状星团当年的样子呢？
The old age typical of the globular clusters in our galaxy has had a profound impact on the study of globulars in general.
在我们星系中，这些典型的老年球状星团对于一般球状星团的研究影响深远。
Distribution of the Spin Vectors of the Disk Galaxies of the Virgo Cluster. Ⅰ. The Catalogue of 310 Disk Galaxies in the Virgo Area
室女团盘星系自转向量的分布Ⅰ.室女天区310个盘星系的表
The Salamanders Chapter hails from a binary planetary system in the western reaches of the Ultima Segmentum.
火蜥蜴军团的家园位于极限星系的西部边缘地带的行星上。
Recently astronomers have discovered these intermediateage globular clusters in several elliptical galaxies.
最近，天文学家已在数个椭圆星系里发现了这类中龄的球状星团。