Large-Scale Filamentary Structure around the Protocluster at Redshift z = 3.1
Large-Scale Filamentary Structure around the Protocluster at Redshift z = 3.1
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DOI：
10.1086/499071
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发表时间：
2005-10
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影响因子：
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通讯作者：
Y. Matsuda;T. Yamada;T. Hayashino;H. Tamura;R. Yamauchi;T. Murayama;T. Nagao;K. Ohta;S. Okamura;M. Ouchi;K. Shimasaku;Y. Shioya;Y. Taniguchi
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文献类型：
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作者：
Y. Matsuda;T. Yamada;T. Hayashino;H. Tamura;R. Yamauchi;T. Murayama;T. Nagao;K. Ohta;S. Okamura;M. Ouchi;K. Shimasaku;Y. Shioya;Y. Taniguchi
报道了在z=3.1时，在红移空间中发现了大规模的Lyα发光体的共格丝状结构。我们进行了光谱观测，以绘制Lyα发射体带状特征的三维结构图，这是我们之前以z=3.1处的原星系团为中心的窄带成像观测发现的。该特征被发现由至少三个相互连接的物理细丝组成。这一结果定性地与星系形成理论的预测一致，即星系在早期宇宙中优先在大规模的丝状或片状质量超密度中形成。我们还发现，两个已知的具有高恒星形成活动的巨型Lyα发射线星云位于这些细丝的交叉点附近，这些细丝可能在局部宇宙中演化成一个大质量星系团。这可能表明，大质量星系的形成发生在高红移的周围大尺度结构中的一个特征位置。
We report the discovery of a large-scale coherent filamentary structure of Lyα emitters in the redshift space at z = 3.1. We carried out spectroscopic observations to map the three-dimensional structure of the beltlike feature of the Lyα emitters discovered by our previous narrowband imaging observations centered on the protocluster at z = 3.1. The feature was found to consist of at least three physical filaments connecting with each other. The result is in qualitative agreement with the prediction of the "biased" galaxy formation theories that galaxies preferentially formed in large-scale filamentary or sheetlike mass overdensities in the early universe. We also found that the two known giant Lyα emission-line nebulae showing high star formation activities are located near the intersection of these filaments, which presumably evolves into a massive cluster of galaxies in the local universe. This may suggest that massive galaxy formation occurs at a characteristic place in the surrounding large-scale structure at high redshift.