Constraints on modified gravity from the Atacama Cosmology Telescope and the South Pole Telescope

被引：15

作者：

Marchini, Andrea ^{[1
]}

Melchiorri, Alessandro

Salvatelli, Valentina

Pagano, Luca

机构：

[1] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

来源：

PHYSICAL REVIEW D | 2013年 / 87卷 / 08期

关键词：

CONSTANT; MODELS;

D O I：

10.1103/PhysRevD.87.083527

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT) have recently provided new and precise measurements of the cosmic microwave background anisotropy damping tail. This region of the cosmic microwave background angular spectra, thanks to the angular distortions produced by gravitational lensing, can probe the growth of matter perturbations and provide a new test for general relativity. Here we make use of the ACT and SPT power spectrum measurements (combined with the recent WMAP9 data) to constrain f(R) gravity theories. Adopting a parametrized approach, we obtain an upper limit on the length scale of the theory of B-0 < 0.86 at 95% C.L. from ACT, while we get a much stronger limit from SPT with B-0 < 0.14 at 95% C.L.

引用

页数：6

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