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Dark Energy after GW170817

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

The observation of GW170817 and its electromagnetic counterpart implies that gravitational waves travel at the speed of light, with deviations smaller than a few 10^-15. We discuss the consequences of this experimental result for models of dark energy and modified gravity characterized by a single scalar degree of freedom.

This talk is part of the Cosmology Lunch series.

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