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首页> 外文期刊>The Astrophysical journal >Signatures of Interstellar-Intracluster Medium Interactions: Spiral Galaxy Rotation Curves in Abell 2029
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Signatures of Interstellar-Intracluster Medium Interactions: Spiral Galaxy Rotation Curves in Abell 2029

机译:星际-团簇内相互作用的特征:阿贝尔2029年的螺旋星系旋转曲线

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We investigate the rich cluster Abell 2029 (z ~ 0.08) using optical imaging and long-slit spectral observations of 52 disk galaxies distributed throughout the cluster field. No strong emission-line galaxies are present within ~400 kpc of the cluster center, a region largely dominated by the similarly shaped X-ray and low surface brightness optical envelopes centered on the giant cD galaxy. However, two-thirds of the galaxies observed outside the cluster core exhibit line emission. Hα rotation curves of 14 cluster members are used in conjunction with a deep I-band image to study the environmental dependence of the Tully-Fisher relation. The Tully-Fisher zero point of Abell 2029 matches that of clusters at lower redshifts, although we do observe a relatively larger scatter around the Tully-Fisher relation. We do not observe any systematic variation in the data with projected distance to the cluster center. We see no environmental dependence of Tully-Fisher residuals, R-I color, Hα equivalent width, or the shape and extent of the rotation curves.
机译:我们使用光学成像和52个分布在整个星团场中的盘状星系的长缝光谱观测研究了富星团Abell 2029(z〜0.08)。在距星团中心约400 kpc的范围内,没有强大的发射线星系存在,该区域主要由以大型cD星系为中心的类似形状的X射线和低表面亮度的光学包膜所控制。但是,在星团核心外部观察到的三分之二的星系显示出线状辐射。将14个簇成员的Hα旋转曲线与深I带图像结合使用,以研究Tully-Fisher关系的环境依赖性。尽管我们确实观察到了围绕Tully-Fisher关系的相对较大的散布,但Abell 2029的Tully-Fisher零点与处于较低红移的群集的零点相匹配。我们没有观察到数据到聚类中心的距离有任何系统的变化。我们看不到Tully-Fisher残差,R-I颜色,Hα当量宽度或旋转曲线的形状和范围对环境的依赖性。

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