Internal Dynamics of ABCG 209 at z ~ 0.21

Internal Dynamics of ABCG 209 at z ~ 0.21
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ABCG 209 在 z ~ 0.21 处的内部动力学

DOI:
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发表时间:
2003
期刊:
影响因子:
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通讯作者:
G. Busarello
G. Busarello
中科院分区:
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文献类型:
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作者:
A. Mercurio;M. Girardi;W. Boschin;P. Merluzzi;G. Busarello

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本文报道了富星系团ABGC 209的光谱和光度观测结果。ABCG 209是一个在z= 0.209处有112个成员星系的峰值,其特征是具有很高的视向速度色散值,σv <$1400 km s−1。该集群显示相关的子结构和动态隔离的证据,其特点是由一个优惠的东南-西北方向。观测情景表明ABCG 209是一个强烈演化的星团,可能处于合并的高级阶段。
We report the results about the internal dynamics of the rich galaxy cluster ABGC 209 on the basis of new spectroscopic and photometric data. ABCG209 is a peak of 112 detected member galaxies at z= 0.209, characterised by a high value of the line–of–sight velocity dispersion, σv ∼ 1400 km s−1. The cluster shows evidence of relevant substructure and dynamical segregation, and is characterised by a preferential SE–NW direction. The observational scenario suggests that ABCG209 is a strongly evolving cluster, possibly in an advanced phase of merging.