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7 papers · 2 filters
A new estimate of the mass of the gravitational scalar field for Dark Energy
Yasunori Fujii
A new estimate of the mass of the pseudo dilaton is offered by following the funda- mental nature that a massless Nambu-Goldstone boson, called a dilaton, in the Einstein frame acq…
Black Holes and Thunderbolt Singularities with Lifshitz Scaling Terms
Yosuke Misonoh, Kei-ichi Maeda
We study a static, spherically symmetric and asymptotic flat spacetime, assuming the hypersurface orthogonal Einstein-aether theory with an ultraviolet modification motivated by th…
Accretion of dark matter by stars
Richard Brito, Vitor Cardoso, Hirotada Okawa
Searches for dark matter imprints are one of the most active areas of current research. We focus here on light fields with mass , such as axions and axion-like candidates. Usi…
Post-Newtonian effects on the stability of the triangular solution in the three-body problem for general masses
Kei Yamada, Takuya Tsuchiya, Hideki Asada
Continuing work initiated in earlier publications [Ichita, Yamada and Asada, Phys. Rev. D {\bf 83}, 084026 (2011); Yamada and Asada, Phys. Rev. D {\bf 86}, 124029 (2012)], we exami…
Bubble Universes With Different Gravitational Constants
Yu-ichi Takamizu, Kei-ichi Maeda
We argue a scenario motivated by the context of string landscape, where our universe is produced by a new vacuum bubble embedded in an old bubble and these bubble universes have no…
Modified gravity inside astrophysical bodies
Ryo Saito, Daisuke Yamauchi, Shuntaro Mizuno +2
Many theories of modified gravity, including the well studied Horndeski models, are characterized by a screening mechanism that ensures that standard gravity is recovered near astr…