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暗能量巡天第一年结果:DES Y1星系弱透镜与SPT +Planck CMB弱透镜的交叉相关

Dark Energy Survey Year 1 Results: Cross-correlation between DES Y1 galaxy weak lensing and SPT+Planck CMB weak lensing

Y. Omori, E. Baxter, C. Chang, D. Kirk, A. Alarcon, G. M. Bernstein, L. E. Bleem, R. Cawthon, A. Choi, R. Chown, T. M. Crawford, C. Davis, J. De Vicente, J. DeR… 展开作者

Y. Omori, E. Baxter, C. Chang, D. Kirk, A. Alarcon, G. M. Bernstein, L. E. Bleem, R. Cawthon, A. Choi, R. Chown, T. M. Crawford, C. Davis, J. De Vicente, J. DeRose, S. Dodelson, T. F. Eifler, P. Fosalba, O. Friedrich, M. Gatti, E. Gaztanaga, T. Giannantonio, D. Gruen, W. G. Hartley, G. P. Holder, B. Hoyle, D. Huterer, B. Jain, M. Jarvis, E. Krause, N. MacCrann, R. Miquel, J. Prat, M. M. Rau, C. L. Reichardt, E. Rozo, S. Samuroff, C. Sánchez, L. F. Secco, E. Sheldon, G. Simard, M. A. Troxel, P. Vielzeuf, R. H. Wechsler, J. Zuntz, T. M. C. Abbott, F. B. Abdalla, S. Allam, J. Annis, S. Avila, K. Aylor, B. A. Benson, E. Bertin, S. L. Bridle, D. Brooks, D. L. Burke, J. E. Carlstrom, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, C. L. Chang, H-M. Cho, A. T. Crites, M. Crocce, C. E. Cunha, L. N. da Costa, T. de Haan, S. Desai, H. T. Diehl, J. P. Dietrich, M. A. Dobbs, W. B. Everett, E. Fernandez, B. Flaugher, J. Frieman, J. García-Bellido, E. M. George, R. A. Gruendl, G. Gutierrez, N. W. Halverson, N. L. Harrington, D. L. Hollowood, K. Honscheid, W. L. Holzapfel, Z. Hou, J. D. Hrubes, D. J. James, T. Jeltema, K. Kuehn, N. Kuropatkin, M. Lima, H. Lin, A. T. Lee, E. M. Leitch, D. Luong-Van, M. A. G. Maia, A. Manzotti, D. P. Marrone, J. L. Marshall, P. Martini, J. J. McMahon, P. Melchior, F. Menanteau, S. S. Meyer, L. M. Mocanu, J. J. Mohr, T. Natoli, R. L. C. Ogando, S. Padin, A. A. Plazas, C. Pryke, A. K. Romer, A. Roodman, J. E. Ruhl, E. S. Rykoff, E. Sanchez, V. Scarpine, K. K. Schaffer, R. Schindler, I. Sevilla-Noarbe, E. Shirokoff, M. Smith, R. C. Smith, M. Soares-Santos, F. Sobreira, Z. Staniszewski, A. A. Stark, K. T. Story, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, K. Vanderlinde, J. D. Vieira, V. Vikram, A. R. Walker, J. Weller, R. Williamson, W. L. K. Wu, O. Zahn

摘要:

我们交叉关联星系弱透镜测量从暗能量调查(DES)的第一年(Y1)的数据与宇宙微波背景(CMB)弱透镜地图来自南极望远镜(SPT)和普朗克数据,与1289度的有效重叠区域$^{2}$。通过对四个源星系红移箱的综合测量,我们拒绝了无透镜效应的假设,其显着性为$10.8σ$。当采用角度尺度切割时,这种意义被降低到$6.8σ$,它仍然是迄今为止同类测量中最高的信噪比。我们将宇宙学参数固定在一个基准的$Λ$ CDM模型上,同时拟合相关函数的振幅,发现了$A = 0.99 \pm 0.17$。我们还使用相关函数测量来约束剪切校准偏差,获得与以前的DES分析一致的约束。最后,在$Λ$ CDM模型下进行宇宙学分析,得到了$Ω_{\rm m}=0.261^{+0.070}_{-0.051}$和$S_{8}\equiv σ_{8}\sqrt{Ω_{\rm m}/0.3} = 0.660^{+0.085}_{-0.100}$的边际约束.这些测量用于同伴的工作,提出了宇宙学的约束,从星系之间的两点函数的联合分析,星系剪切,和CMB透镜使用DES,SPT和普朗克数据。

英文摘要:

We cross-correlate galaxy weak lensing measurements from the Dark Energy Survey (DES) year-one (Y1) data with a cosmic microwave background (CMB) weak lensing map derived from South Pole Telescope (SPT) and Planck data, with an effective overlapping area of 1289 deg$^{2}$. With the combined measurements from four source galaxy redshift bins, we reject the hypothesis of no lensing with a significance of $10.8σ$. When employing angular scale cuts, this significance is reduced to $6.8σ$, which remains the highest signal-to-noise measurement of its kind to date. We fit the amplitude of the correlation functions while fixing the cosmological parameters to a fiducial $Λ$CDM model, finding $A = 0.99 \pm 0.17$. We additionally use the correlation function measurements to constrain shear calibration bias, obtaining constraints that are consistent with previous DES analyses. Finally, when performing a cosmological analysis under the $Λ$CDM model, we obtain the marginalized constraints of $Ω_{\rm m}=0.261^{+0.070}_{-0.051}$ and $S_{8}\equiv σ_{8}\sqrt{Ω_{\rm m}/0.3} = 0.660^{+0.085}_{-0.100}$. These measurements are used in a companion work that presents cosmological constraints from the joint analysis of two-point functions among galaxies, galaxy shears, and CMB lensing using DES, SPT and Planck data.

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。

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