Structure formation in the new Deser-Woodard nonlocal gravity model

19 Nov 2019 Ding Jia-Cheng Deng Jian-Bo

We consider the structure formation in the nonlocal gravity model proposed recently by Deser and Woodard (DW-2019 model), which can not only reproduce the $\Lambda$CDM cosmology without fine-tuning puzzle but also may provide a screening mechanism for free. By using the direct numerical method of the reconstructing technique, the nonlocal distortion function $f(Y)$ is fixed as $f(Y)\simeq\boldsymbol{e}^{2.153(Y-16.97)}$ which has a small deviation with the fitted function proposed by Deser and Woodard... (read more)

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Categories


  • COSMOLOGY AND NONGALACTIC ASTROPHYSICS
  • GENERAL RELATIVITY AND QUANTUM COSMOLOGY