| Merger Dynamics of the Pair of Galaxy Clusters——A399 and A401 |
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| 引用本文： | Qi-Rong Yuan,Peng-Fei Yan,Yan-Bin Yang and Xu Zhou Department of Physics,Nanjing Normal University,Nanjing 210097 yuanqirong@njnu. edu. cn National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012 Department of Mathematics and Physics,Qingdao University of Science and Technology,Qingdao 266042. Merger Dynamics of the Pair of Galaxy Clusters——A399 and A401[J]. 中国天文和天体物理学报, 2005, 5(2): 126-136 |
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| 作者姓名： | Qi-Rong Yuan Peng-Fei Yan Yan-Bin Yang and Xu Zhou Department of Physics Nanjing Normal University Nanjing 210097 yuanqirong@njnu. edu. cn National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Department of Mathematics and Physics Qingdao University of Science and Technology Qingdao 266042 |
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| 作者单位： | Qi-Rong Yuan，Peng-Fei Yan，Yan-Bin Yang and Xu Zhou Department of Physics，Nanjing Normal University，Nanjing 210097 yuanqirong@njnu. edu. cn National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 Department of Mathematics and Physics，Qingdao University of Science and Technology，Qingdao 266042 |
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| 基金项目： | the National Natural Science Foundation of China. |
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| 摘 要： | Convincing 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-1 along 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.
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| 关 键 词： | 河外星系丛 聚集动力学 运动轨迹 X-射线观测 |
Merger Dynamics of the Pair of Galaxy Clusters--A399 and A401 |
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| Qi-Rong Yuan,Peng-Fei Yan,Yan-Bin Yang and Xu Zhou. Merger Dynamics of the Pair of Galaxy Clusters--A399 and A401[J]. Chinese Journal of Astronomy and Astrophysics, 2005, 5(2): 126-136 |
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| Authors: | Qi-Rong Yuan Peng-Fei Yan Yan-Bin Yang Xu Zhou |
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| Affiliation: | Qi-Rong Yuan,Peng-Fei Yan,Yan-Bin Yang and Xu Zhou Department of Physics,Nanjing Normal University,Nanjing 210097 yuanqirong@njnu. edu. cn National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012 Department of Mathematics and Physics,Qingdao University of Science and Technology,Qingdao 266042 |
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| Abstract: | |
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| Keywords: | galaxies: clusters: individual (A399 A401)-galaxies: kinematics and dynamics |
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