The nature of ‘box’ and ‘peanut’ shaped galactic bulges
The nature of ‘box’ and ‘peanut’ shaped galactic bulges
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DOI：
10.1093/mnras/229.4.691
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发表时间：
1987-12
影响因子：
4.8
通讯作者：
M. Shaw
中科院分区：
文献类型：
--
作者：
M. Shaw
我们展示了对第二参考目录中所有大型、正常边缘螺旋星系和透镜状星系的调查结果，试图隔离那些显示出“盒子”或“花生”形中央凸起的天体。总共 20 (± 4)% 的样本天体显示出感兴趣的特征（意味着 RC2 中大约 750 个正常星系应该这样做）。人们发现这些盒子/花生表现出中间形态类型的强烈倾向，并且似乎不会比“正常”凸起对它们所在星系的光度或射电特性产生更大或更小的影响。发现占据集群或群体环境的“四四方方”凸起的分数与样本中非盒子/花生的分数相同。与非盒子候选者相比，他们也没有表现出对拥有大量微弱卫星系统的偏好。讨论了这些结果对此类系统当前形成理论的影响。
We present the results of a survey of all large, normal edge-on spiral and lenticular galaxies in theSecond Reference Cataloguein an attempt to isolate those objects displaying either ‘box’ or ‘peanut’ shaped central bulges.A total of 20 (± 4) per cent of the sample objects display the features of interest (implying that ∼750 normal galaxies in the RC2 should do so). These box/peanuts are found to show a strong tendency towards intermediate morphological types and do not seemingly influence either the photometric or radio properties of the galaxies in which they reside to any greater or lesser degree than do ‘normal’ bulges. The fraction of ‘boxy’ bulges which occupy cluster or group environments is found to be identical to that fraction for the non-box/peanuts in the sample. They also show no preference for possession of a large number of faint satellite systems than do the non-box candidates.The implications of these results for current formation theories of such systems are discussed.