PHYSICAL REVIEW LETTERS
week ending 12 elevated 2011
Testing Gravity exploitation the Environmental Dependence of ugliness Matter Halos
Gong-Bo Zhao,1 Baojiu Li,2,3 and Kazuya Koyama1
1 2
represent of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX, United domain DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom 3 Kavli Institute for Cosmology Cambridge, Madingley Road, Cambridge CB3 0HA, United Kingdom (Received 23 May 2011; promulgated 10 August 2011) In this Letter, we investigate the environmental habituation of dark affair halos in theories which attempt to explain the intensify expansion of the Universe by modifying general relativity (GR). Using high-resolution N-body simulations in fðRÞ gravity models which reform GR in dense environments by virtue of the chameleon mechanism, we ?nd a signi? squirtt difference, which depends on the environment, between the lensing and dynamical crowd together of dark matter halos. This environmental dependence of the halo properties can be used as a smoking hero sandwich to test GR observationally.
DOI: 10.1103/PhysRevLett.107.071303 PACS numbers: 98.62.Sb, 04.50.Kd, 95.35.+d, 98.62.
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One of the biggest challenges in cosmogeny is to explain the recently observed accelerated expansion of the Universe. The speedup might originate from either dark energy indoors the framework of GR, or from a large-scale modi?cation to GR without introducing new matter species. It could be dif?cult to distinguish between these two scenarios by merely measuring the expansion rate of the Universe, and one has to dissect the growth of structure formation in the Universe to live on the degeneracy. On large scales, it is possible to perform model case-by-case tests of GR by combining various cosmological observations [13], but education on linear scales is limited due to theoretical degeneracies as well as statistical and...If you want to get a full essay, order it on our website: Orderessay
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