Ophiuchus Supercluster and Wall Structure

蛇夫座星团是1981年由若松和马尔坎在帕洛玛IV-N施密特板块上朝向银河系中心的隐藏球状星团巡天中发现的。它随后被确认为天空中第三亮的星团，仅次于室女座和英仙座星团。1992- 1994年期间，我们在CTIO、Lick、SAAO和AAO对这个cD星团进行了红移观测，获得了以下初步结果：1）发现了cD星团以外的几个新的星团，它们组成了蛇夫座超星系团，大小至少为12 ° × 18 °。这两个天体之间可能有一个像长城一样大的天体壁结构相连。3）这个Oph-Her天体壁可能与武仙座超星系团的长城几乎垂直相交。为了证实这个天体壁结构的存在，英国施密特望远镜计划在今年6月用光纤型多天体光谱仪进行进一步的红移测量。这项工作的一部分被总结为长谷川先生在东京大学的博士论文。

Ophiuchus cluster was discovered in 1981 by Wakamatsu and Malkan during hidden globular cluster survey on Palomar IV-N Schmidt plates towards the Galactic center. It was subsequently identified as the third brightest cluster in the sky after Virgo and perseus clusters. We have made redshift surveys around this cD cluster at CTIO,Lick, SAAO and AAO, in the period of 1992-94, and obtained the following preliminary results.1) Several new clusters besides the cD cluster were discovered, and they form Ophiuchus Supercluster at least with a size of 12 deg x 18 deg.2) From our pilot redshift survey between Ophiuchus and Hercules superclusters, these two may be connected with a wall structure as large as the Great Wall.3) This Oph-Her wall may be crossed nearly perpendicularly to the Great Wall at Hercules supercluster.To confirm the presence of this wall structure, further redshift survey is scheduled in this June with fiber-type multi-object spectrograph at UK Schmidt telescope. A part of this work was summarized as a Doctorate thesis of Mr Hasegawa at University of Tokyo.