Vainshtein Screening in Bimetric Cosmology

Autor:	Lüben, Marvin, Schmidt-May, Angnis, Smirnov, Juri
Rok vydání:	2019
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory
Zdroj:	Phys. Rev. D 102, 123529 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.102.123529
Popis:	We demonstrate that the instabilities in linear cosmological perturbations in bimetric theory are the manifestation of the non-linear Vainshtein mechanism on an FRW background. The spin-2 mass serves as the cosmological Vainshtein scale in this case. This allows us to quantitatively address early universe cosmology. In particular, in a global analysis, we study data from the cosmic microwave background radiation and local measurements of the Hubble flow. We show that bimetric cosmology resolves the discrepancy in the local and early-time measurements of the Hubble scale via an effective phantom dark energy component. Comment: Version published in PRD, comments are welcome
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1912.09449 Zobrazit plný text záznamu View this record from Arxiv