2012-01-30

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Tatsuya Narikawa (Hiroshima University)
Tatsuya Narikawa (Hiroshima University)~
Title: Testing modified gravity with halo density profiles~
Abstract:~
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.~

References:~
T. Narikawa, R. Kimura, T. Yano and K. Yamamoto,
"Halo models in modified gravity theories with self-accelerated expansion",
arXiv:1108.2346~
T. Narikawa and K. Yamamoto,
"Testing gravity with halo density profiles observed through gravitational lensing",
arXiv:1201.4037