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arXiv 1404.1933astro-ph.CO
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宇宙远红外背景各向异性与大尺度结构的互相关

Cross-correlation of cosmic far-infrared background anisotropies with large scale structures

Paolo Serra, Guilaine Lagache, Olivier Doré, Anthony Pullen, Martin White

摘要:

我们测量了Sloan数字巡天(SDSS)-III数据发布8(DR 8)和普朗克宇宙红外背景(CIB)各向异性以及红外天文卫星(IRAS)改进后处理(IRIS)在353,545,857和3000 GHz(对应于850,550,350和100微米,在多极范围100<1 <1000。我们使用在北半球7760 deg^2范围内,在红移范围0.45 < z < 0.65内,通过光度测量确定的大约6.5 × 10^5个LRG,用扩展的晕模型对远红外背景(FIRB)各向异性进行建模。用这些方法,我们证实了最近用Herschel和Planck对FIRB各向异性的分析所得到的基本图象,即在容纳恒星形成星系的最有效晕质量是log(M_ eff/M_ \odot)=12.84+/-0.15。我们估计在3000、857、545和353 GHz处,与LRG相关的FIRB各向异性的百分比分别约为总数的11.8%、3.9%、1.8%和1.0%。在红移z~0.55处,FIRB星系相对于暗物质密度场的偏差值为b_{FIRB} ~1.45,平均尘埃温度为Td =26 K。最后,我们讨论了目前和即将到来的互相关与远红外背景各向异性的影响,对全球恒星形成历史的确定和星系与暗物质之间的联系。

英文摘要:

We measure the cross-power spectra between luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS)-III Data Release Eight (DR8) and cosmic infrared background (CIB) anisotropies from Planck and data from the Improved Reprocessing (IRIS) of the Infrared Astronomical Satellite (IRAS) at 353, 545, 857, and 3000 GHz, corresponding to 850, 550, 350 and 100 micron, respectively, in the multipole range 100<l<1000. Using approximately 6.5 10^5 photometrically determined LRGs in 7760 deg^2 of the northern hemisphere in the redshift range 0.45 < z < 0.65, we model the far-infrared background (FIRB) anisotropies with an extended version of the halo model. With these methods, we confirm the basic picture obtained from recent analyses of FIRB anisotropies with Herschel and Planck, that the most efficient halo mass at hosting star forming galaxies is log(M_ eff/M_\odot)=12.84+/-0.15. We estimate the percentage of FIRB anisotropies correlated with LRGs as approximately 11.8 %, 3.9 %, 1.8 %, and 1.0 % of the total at 3000, 857, 545, and 353 GHz, respectively. At redshift z~0.55, the bias of FIRB galaxies with respect to the dark matter density field has the value b_{FIRB}~1.45, and the mean dust temperature of FIRB galaxies is T_d=26 K. Finally, we discuss the impact of present and upcoming cross-correlations with far-infrared background anisotropies on the determination of the global star formation history and the link between galaxies and dark matter.

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