Constraining modified theories of gravity with the galaxy bispectrum

被引：28

作者：

Yamauchi, Daisuke ^{[1
]}

Yokoyama, Shuichiro ^{[2
,3
]}

Tashiro, Hiroyuki ^{[4
]}

机构：

[1] Kanagawa Univ, Fac Engn, Yokohama, Kanagawa 2218686, Japan

[2] Rikkyo Univ, Dept Phys, Tokyo 1718501, Japan

[3] Univ Tokyo, Kavli IPMU WPI, UTIAS, Kashiwa, Chiba 2778583, Japan

[4] Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi 4648602, Japan

来源：

PHYSICAL REVIEW D | 2017年 / 96卷 / 12期

关键词：

SURVEY COSMOLOGICAL IMPLICATIONS; REDSHIFT SPACE; DARK ENERGY; EVOLUTION; MODELS; WEDGES; TIME;

D O I：

10.1103/PhysRevD.96.123516

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore the use of the galaxy bispectrum induced by the nonlinear gravitational evolution as a possible probe to test general scalar-tensor theories with second-order equations of motion. We find that time dependence of the leading second-order kernel is approximately characterized by one parameter, the second-order index, which is expected to trace the higher-order growth history of the Universe. We show that our new parameter can significantly carry new information about the nonlinear growth of structure. We forecast future constraints on the second-order index as well as the equation-of-state parameter and the growth index.

引用

页数：13

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