Tatsuya Narikawa (Hiroshima University)

Title: Testing modified gravity with halo density profiles


Modifications of gravity provide alternative explanation to dark energy for late-time cosmic acceleration of the Universe. Many modified gravity models (MG) introduce a new scalar degree of freedom (dof) which affects the gravitational force and Poisson equation. However, the solar-system tests require MG to shield the scalar dof in dense regions. We have investigated how the screening mechanism of the scalar dof works on halo scales.


T. Narikawa, R. Kimura, T. Yano and K. Yamamoto,
"Halo models in modified gravity theories with self-accelerated expansion",

T. Narikawa and K. Yamamoto,
"Testing gravity with halo density profiles observed through gravitational lensing",

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Last-modified: 2013-11-20 (水) 11:11:56 (2069d)