期刊
PHYSICAL REVIEW D
卷 96, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.123516
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [17K14304, 15K17659, 15H05888, 16H01103, 15K17646, 17H01110]
- Grants-in-Aid for Scientific Research [17K14304, 16H01103, 15K17646, 17H01110, 15K17659, 15H05888] Funding Source: KAKEN
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.
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