Cosmo-26

Cosmological perturbations of a relativistic MOND theory

Not scheduled

20m

Gorlaeus gebouw (Leiden University)

Talk Dark Energy / Modified Gravity

Speaker

Hyerim Noh (Korea Astronomy and Space Science Institute)

Description

A relativistic MOND theory, promising reproducing cosmology as well as MOND phenomenology in the low accelerlation regime, was recently proposed. We present post Newtonian (PN) approximation and relativistic perturbation equations in cosmological context. The PN equations are presented to 1PN order and the perturbation equations are presented in fully nonlinear and exact forms. We show that to 0PN order baryon perturbation grows faster in MOND regime. The MOND field can be interpreted as a fluid with specific equation of state wiout anisotropic stress, and Jeans criterion is derived for the MOND field.