The Structure of Clusters with Bimodal Distributions of Galaxy Radial Velocities. I. A1035

被引:5
|
作者
Kopylov, A. I. [1 ]
Kopylova, F. G. [1 ]
机构
[1] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
基金
俄罗斯基础研究基金会; 美国国家科学基金会; 美国国家航空航天局;
关键词
D O I
10.1134/S1990341307040025
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The structure of the A1035 cluster of galaxies (10(h)32(m) + 40 degrees 13', cz similar to 22000 km s(-1)), which exhibits a bimodal distribution of galaxy radial velocities (Delta V approximate to 3000 km s(-1)), is analyzed using three methods of determining the relative distances to clusters from early-type galaxies: the Kormendy relation corrected for the dependence of residuals on galaxy magnitude, the photometric plane, and the fundamental plane. We use the data obtained with the 1-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences and SDSS (DR5) data to show that A1035 consists of two gravitationally unbound independent clusters. These clusters with the velocity dispersions of 566 km s(-1) and 610 km s(-1) and masses within R(200) equal to 2.7 . 10(14) and 3.5 . 10(14) M(circle dot), respectively, obey the Hubble law.
引用
收藏
页码:311 / 318
页数:8
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