Testing gravity against the early time integrated Sachs-Wolfe effect
作者： Pengjie Zhang
DOI: 10.1103/PHYSREVD.73.123504
关键词: Gravitational potential 、 Dark energy 、 Physics 、 Lambda 、 Mathematical physics 、 Space (mathematics) 、 Quantum mechanics 、 Degenerate energy levels 、 General relativity 、 Redshift 、 Sachs–Wolfe effect 、 Nuclear and High Energy Physics
摘要: A generic prediction of general relativity is that the cosmological linear density growth factor D scale independent. But in general, modified gravities do not preserve this signature. dependent can cause time variation gravitational potential at high redshifts and provides a new test gravity, through early integrated Sachs-Wolfe (ISW) effect-large structure (LSS) cross correlation. We demonstrate power for class f(R) with form = {lambda}{sub 1}H{sub 0}{sup 2} exp(-R/{lambda}{sub 2}H{sub 2}). Such even degenerate expansion history to {Lambda}CDM, produce detectable ISW effect z {approx}> 3 l 20. Null-detection such would constrain be > 1000 95% confidence level. On other hand, robust detection ISW-LSS correlation will severely challenge relativity.
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