NAOC Open IR
Merger Dynamics of the Pair of Galaxy Clusters--A399 and A401
Yuan Qirong1; Yan Pengfei2; Yang Yanbin3; Xu Zhou3
2005
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume5Issue:2Pages:126
AbstractConvincing evidence for a past interaction between the two rich clusters A399 and A401 was recently found in the X-ray imaging observations. We examine the structure and dynamics of this pair of galaxy clusters. A mixture-modeling algorithm was applied to obtain a robust partition into two clusters, which allowed us to discuss the virial mass and velocity distribution of each cluster. Assuming that these two clusters follow a linear orbit and they have once experienced a close encounter, we model the binary cluster as a two-body system. As a result, four gravitationally bound solutions are obtained. The recent X-ray observations seem to favor a scenario in which the two clusters with a true separation of 5.4h-1 Mpc are currently expanding at 583 km s-1along a direction with a projection angle of 67.5°, and they will reach a maximum extent of 5.65 h-1 Mpc in about 1.0 h-1 Gyr.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/45877
Collection中国科学院国家天文台
Affiliation1.南京师范大学
2.青岛科技大学
3.中国科学院国家天文台
Recommended Citation
GB/T 7714
Yuan Qirong,Yan Pengfei,Yang Yanbin,et al. Merger Dynamics of the Pair of Galaxy Clusters--A399 and A401[J]. Chinese Journal of Astronomy and Astrophysics,2005,5(2):126.
APA Yuan Qirong,Yan Pengfei,Yang Yanbin,&Xu Zhou.(2005).Merger Dynamics of the Pair of Galaxy Clusters--A399 and A401.Chinese Journal of Astronomy and Astrophysics,5(2),126.
MLA Yuan Qirong,et al."Merger Dynamics of the Pair of Galaxy Clusters--A399 and A401".Chinese Journal of Astronomy and Astrophysics 5.2(2005):126.
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