Two simple modified-gravity models: K-mouflage and Goldstone (ultra-local) models.

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• Patrick Valageas (Saclay)
• Monday 13 November 2017, 13:00-14:00
• CMS, Pav. B, CTC Common Room (B1.19) [Potter Room].

If you have a question about this talk, please contact Tobias Baldauf.

The accelerated expansion of the Universe might be related to modifications of gravity on cosmological scales and to the impact of additional scalar fields. However, to recover General Relativity on small scales, one usually needs to introduce non-linear screening mechanisms. I will present K-mouflage models, which are one of the three screening mechanisms that have been developed so far. I will discuss their stability with respect to quantum corrections, the constraints from solar system tests of gravity, and the impact on cosmological probes. I will also briefly discuss the opposite case of ultra-local models.

This talk is part of the Cosmology Lunch series.

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