Evidence of Primordial Clustering around the QSO SDSS J1030+0524 at z = 6.28
Evidence of Primordial Clustering around the QSO SDSS J1030+0524 at z = 6.28
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在 z = 6.28 处 QSO SDSS J1030 0524 周围原始聚类的证据
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
G. Meylan
中科院分区：
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作者：
M. Stiavelli;S. Djorgovski;C. Pavlovsky;C. Scarlata;D. Stern;A. Mahabal;D. Thompson;M. Dickinson;N. Panagia;G. Meylan
我们提出了初步的原始集群的证据，表现为在类星体SDSS J1030+0524在红移z = 6.28领域的颜色选择对象过剩。我们已经选择了物体红色的基础上，哈勃空间望远镜先进的相机调查领域的成像中心的类星体在i775 -z 850。与大天文台起源深度巡天获得的可比深度的数据相比，我们在类星体场中发现了过量的i775 -z 850 ≥ 1.5的天体。仅基于计数，检测的显著性估计为~97%，如果考虑颜色分布，则显著性增加至99.4%。如果得到证实，这将代表星系团的最高红移的例子，并将对结构增长的模型产生影响。偏置驱动集群的第一发光物体形成的最高峰的原始密度场预计在大多数模型的早期结构形成。其中一个候选者的红移已被发现是z = 5.970，由我们的光谱与凯克I低分辨率成像光谱仪，确认我们的颜色选择的有效性。
We present tentative evidence of primordial clustering, manifested as an excess of color-selected objects in the field of the QSO SDSS J1030+0524 at redshift z = 6.28. We have selected objects red in i775 - z850 on the basis of Hubble Space Telescope Advanced Camera for Surveys imaging of a field centered on the QSO. Compared to data at comparable depth obtained by the Great Observatories Origins Deep Survey, we find an excess of objects with i775 - z850 ≥ 1.5 in the QSO field. The significance of the detection is estimated to be ~97% on the basis of the counts alone and increases to 99.4% if one takes into account the color distribution. If confirmed, this would represent the highest redshift example of galaxy clustering and would have implications on models for the growth of structure. Bias-driven clustering of first luminous objects forming in the highest peaks of the primordial density field is expected in most models of early structure formation. The redshift of one of the candidates has been found to be z = 5.970 by our spectroscopy with the Keck I Low Resolution Imaging Spectrometer, confirming the validity of our color selection.