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2018

Non-parametric Reconstruction of Growth Index via Gaussian Processes

Yin, Zhao-Yu, Wei, Hao

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The accelerated cosmic expansion could be due to dark energy within general relativity (GR), or modified gravity.

It is of interest to differentiate between them, by using both the expansion history and the growth history.
In the literature, it was proposed that the growth index $\gamma$ is useful to distinguish these two scenarios.
In this work, we consider the non-parametric reconstruction of the growth index $\gamma$ as a function of redshift $z$ from the latest observational data as of July 2018 via Gaussian Processes.

Non-parametric Reconstruction of Growth Index via Gaussian Processes · Around

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