Jul 5 – 10, 2021
Europe/Rome timezone

Reconstructing the growth and expansion history. The case for negative dark energy?

Jul 6, 2021, 10:50 AM
Talk in the parallel session Dark Energy and the accelerating universe Dark Energy and the Accelerating Universe


Benjamin L'Huillier (Sejong University)


The consistency between the cosmic expansion and growth may hold clues about the nature of the acceleration of the Universe. Using model-independent methods, we reconstruct the growth history from redshift-space distortion and deduce the corresponding expansion history, which we test against supernovae data. Motivated by these results, we then introduce a model of two-component dark energy with a negative cosmological constant hidden behind a phantom-like fluid, and study the viability of such models against state-of-the-art data. While the model does not show better evidence than a cosmological constant, it is still consistent with the data.

Primary author

Benjamin L'Huillier (Sejong University)

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