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arXiv 2104.14515astro-ph.CO
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用DES-CMASS样品和BOSS光谱探测重力

Probing gravity with the DES-CMASS sample and BOSS spectroscopy

S. Lee, E. M. Huff, A. Choi, J. Elvin-Poole, C. Hirata, K. Honscheid, N. MacCrann, A. J. Ross, M. A. Troxel, T. F. Eifler, H. Kong, A. Ferté, J. Blazek, D. Hute… 展开作者

S. Lee, E. M. Huff, A. Choi, J. Elvin-Poole, C. Hirata, K. Honscheid, N. MacCrann, A. J. Ross, M. A. Troxel, T. F. Eifler, H. Kong, A. Ferté, J. Blazek, D. Huterer, A. Amara, A. Campos, A. Chen, S. Dodelson, P. Lemos, C. D. Leonard, V. Miranda, J. Muir, M. Raveri, L. F. Secco, N. Weaverdyck, J. Zuntz, S. L. Bridle, C. Davis, J. DeRose, M. Gatti, J. Prat, M. M. Rau, S. Samuroff, C. Sánchez, P. Vielzeuf, M. Aguena, S. Allam, A. Amon, F. Andrade-Oliveira, G. M. Bernstein, E. Bertin, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, R. Cawthon, C. Conselice, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. De Vicente, S. Desai, H. T. Diehl, J. P. Dietrich, P. Doel, S. Everett, A. E. Evrard, I. Ferrero, P. Fosalba, J. Frieman, J. García-Bellido, E. Gaztanaga, D. W. Gerdes, T. Giannantonio, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, W. G. Hartley, S. R. Hinton, D. L. Hollowood, B. Hoyle, D. J. James, K. Kuehn, N. Kuropatkin, O. Lahav, M. Lima, M. A. G. Maia, M. March, J. L. Marshall, F. Menanteau, R. Miquel, J. J. Mohr, R. Morgan, A. Palmese, F. Paz-Chinchón, A. Pieres, A. A. Plazas Malagón, A. Roodman, E. Sanchez, V. Scarpine, M. Schubnell, S. Serrano, I. Sevilla-Noarbe, E. Sheldon, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, C. To, T. N. Varga, J. Weller

摘要:

DES-CMASS样品(DMASS)的设计是为了最佳地结合来自暗能量巡天(DES)的弱透镜测量和来自重子振荡光谱巡天(BOSS)的CMASS星系样品探测的红移空间畸变(RSD)。在本文中,我们证明了采用DMASS作为等效的BOSS CMASS的DES和BOSS的联合分析的框架中修改的重力的可行性。我们利用角的DMASS星系,宇宙剪切的DES METACALIBRATION源,和互相关的两个数据向量的集群。通过将这些数据与BOSS CMASS样品和普朗克数据的RSD测量值进行联合拟合,得到了修正重力参数$μ_0 = -0.37^{+0.47}_{-0.45}$和$Σ_0 = 0.078^{+0.078}_{-0.082}$的约束条件。我们没有发现任何明显偏离广义相对论的现象。我们的约束修正重力测量的DMASS比DES第1年redMaGiC星系样本与相同的外部数据集由$29\%$为$μ_0$和$21\%$为$Σ_0$,并与DES第1年的修正重力分析发表的结果相比,尽管这项工作使用较少的外部数据集。这种改进主要是因为星系偏置参数被CMASS和DMASS共享并受到更严格的约束,有效地打破了星系偏置和其他宇宙学参数之间的简并性。使用与光谱样本等效的光度样本来最佳地组合光度测量和光谱测量的这种方法可以应用于组合具有有限重叠的未来测量,诸如DESI和LSST。

英文摘要:

The DES-CMASS sample (DMASS) is designed to optimally combine the weak lensing measurements from the Dark Energy Survey (DES) and redshift-space distortions (RSD) probed by the CMASS galaxy sample from the Baryonic Oscillation Spectroscopic Survey (BOSS). In this paper, we demonstrate the feasibility of adopting DMASS as the equivalent of BOSS CMASS for a joint analysis of DES and BOSS in the framework of modified gravity. We utilize the angular clustering of the DMASS galaxies, cosmic shear of the DES METACALIBRATION sources, and cross-correlation of the two as data vectors. By jointly fitting the combination of the data with the RSD measurements from the BOSS CMASS sample and Planck data, we obtain the constraints on modified gravity parameters $μ_0 = -0.37^{+0.47}_{-0.45}$ and $Σ_0 = 0.078^{+0.078}_{-0.082}$. We do not detect any significant deviation from General Relativity. Our constraints of modified gravity measured with DMASS are tighter than those with the DES Year 1 redMaGiC galaxy sample with the same external data sets by $29\%$ for $μ_0$ and $21\%$ for $Σ_0$, and comparable to the published results of the DES Year 1 modified gravity analysis despite this work using fewer external data sets. This improvement is mainly because the galaxy bias parameter is shared and more tightly constrained by both CMASS and DMASS, effectively breaking the degeneracy between the galaxy bias and other cosmological parameters. Such an approach to optimally combine photometric and spectroscopic surveys using a photometric sample equivalent to a spectroscopic sample can be applied to combining future surveys having a limited overlap such as DESI and LSST.

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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