説明
Late-time cosmology in the extended cuscuton theory is studied, in which gravity is modified while one still has no extra dynamical degrees of freedom other than two tensor modes. We present a simple example admitting analytic solutions for the cosmological background evolution that mimics ΛCDM cosmology. We argue that the extended cuscuton as dark energy can be constrained, like usual scalar-tensor theories, by the growth history of matter density perturbations and the time variation of Newton's constant.
収録刊行物
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- Journal of Cosmology and Astroparticle Physics
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Journal of Cosmology and Astroparticle Physics 2020 (07), 004-, 2020-07-02
IOP Publishing
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詳細情報 詳細情報について
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- CRID
- 1050294045368149632
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- NII論文ID
- 120007124103
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- ISSN
- 14757516
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- HANDLE
- 20.500.14094/90008467
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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