MegaZ DR7测光红移巡天中的大尺度超聚现象
Excess Clustering on Large Scales in the MegaZ DR7 Photometric Redshift Survey
摘要：
我们观察到一个巨大的过剩的权力，在统计聚类的发光红galvanic在光度SDSS星系样本称为MegaZ DR 7。这在0.45 < z < 0.65之间的四个等间距红移仓中的角功率谱C_{\ell}中的最低多极上可见。然而，它在~ 4 sigma的最高红移带中最为突出，并且在有效尺度k ~ 0.01 h Mpc^{-1}处出现。鉴于MegaZ DR 7是迄今为止宇宙体积最大的星系巡天（3.3（Gpc h^{-1}）^[3]），这意味着在星系探测的最大物理尺度上存在异常。或者，这个特征可能是它出现在最系统敏感的红移处的结果。对于这种过剩的力量有几种解释，从系统论到新物理学。这可能对下一代星系巡天或LCDM模型产生重要影响。我们测试调查，数据和多余的权力，以及可能的起源。
英文摘要：
We observe a large excess of power in the statistical clustering of Luminous Red Galaxies in the photometric SDSS galaxy sample called MegaZ DR7. This is seen over the lowest multipoles in the angular power spectra C_{\ell} in four equally spaced redshift bins between 0.45 < z < 0.65. However, it is most prominent in the highest redshift band at ~ 4 sigma and it emerges at an effective scale k ~ 0.01 h Mpc^{-1}. Given that MegaZ DR7 is the largest cosmic volume galaxy survey to date (3.3 (Gpc h^{-1})^3) this implies an anomaly on the largest physical scales probed by galaxies. Alternatively, this signature could be a consequence of it appearing at the most systematically susceptible redshift. There are several explanations for this excess power that range from systematics to new physics. This could have important consequences for the next generation of galaxy surveys or the LCDM model. We test the survey, data and excess power, as well as possible origins.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
