@inproceedings{f3109b8242674f8f8a8af1339781c0f0,
title = "Cosmological and astrophysical Vainshtein mechanism in bigravity",
abstract = "Although the linear massive spin-2 theory is not restored to general relativity (GR) even in a massless limit, Vainshtein proposed the discontinuity can be resolved by taking into account nonlinear interactions. We consider whether the nonlinear ghost-free bigravity theory can be restored to GR both in the cosmological background and in the strong gravitational field based on a spherically symmetric configuration. In the cosmological background, the scalar graviton is stabilized by nonlinear interactions in the early stage of the Universe, thus the bigravity has the GR limit with neither a ghost instability nor a gradient instability. On the other hand, the bigravity cannot describe a static compact object beyond a critical value of gravitational field strength for a parameter space of coupling constants, at which the scalar graviton shows a singular behaviour.",
keywords = "Modified gravity, Screening mechanism",
author = "Katsuki Aoki and Maeda, {Kei Ichi} and Makoto Tanabe and Ryo Namba",
note = "Funding Information: This work was supported in part by Grants-in-Aid from the Scientific Research Fund of the Japan Society for the Promotion of Science (Nos. 25400276 and 15J05540).; 14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories ; Conference date: 12-07-2015 Through 18-07-2015",
year = "2018",
doi = "10.1142/9789813226609_0134",
language = "English",
series = "14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings",
publisher = "World Scientific Publishing Co. Pte Ltd",
pages = "1493--1498",
editor = "Massimo Bianchi and Jantzen, {Robert T} and Remo Ruffini and Remo Ruffini",
booktitle = "14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings",
}