Large-Scale Distribution of Total Mass versus Luminous Matter from Baryon Acoustic Oscillations: First Search in the Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey Data Release 10.

Large-Scale Distribution of Total Mass versus Luminous Matter from Baryon Acoustic Oscillations: First Search in the Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey Data Release 10.
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重子声振荡总质量与发光物质的大规模分布:斯隆数字巡天 III 重子振荡光谱巡天数据第 10 版中的首次搜索。

DOI:
10.1103/physrevlett.116.201302
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发表时间:
2016
影响因子:
8.6
通讯作者:
Soumagnac MT
Soumagnac MT
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Soumagnac MT

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早期宇宙中的重子声波振荡被预测会在总质量与发光物质的相对聚集上留下一个尚未被检测到的特征。对这种效应的探测将为标准宇宙学范式提供重要的确认,并限制暗物质的替代品以及补偿等曲率扰动(CIP)等非标准波动。我们进行了第一次观测搜索这种效果,通过比较数字加权和亮度加权的相关函数,使用SDSS-III BOSS数据发布10 CMASS样本。当包括CIP在我们的模型中,我们正式获得证据的相对聚类签名和限制,符合现有的上限CIP的幅度。然而,各种测试表明,这些结果尚不可靠,可能是由于数据中的系统性偏差。本信中开发的方法与更准确的未来数据(如DESI的数据)一起使用,可能会证实或反驳我们的初步证据。
Baryon acoustic oscillations in the early Universe are predicted to leave an as yet undetected signature on the relative clustering of total mass versus luminous matter. A detection of this effect would provide an important confirmation of the standard cosmological paradigm and constrain alternatives to dark matter as well as nonstandard fluctuations such as compensated isocurvature perturbations (CIPs). We conduct the first observational search for this effect, by comparing the number-weighted and luminosity-weighted correlation functions, using the SDSS-III BOSS Data Release 10 CMASS sample. When including CIPs in our model, we formally obtain evidence atof the relative clustering signature and a limit that matches the existing upper limits on the amplitude of CIPs. However, various tests suggest that these results are not yet robust, perhaps due to systematic biases in the data. The method developed in this Letter used with more accurate future data such as that from DESI, is likely to confirm or disprove our preliminary evidence.
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