http://arxiv.org/abs/2209.08102
We consider a phenomenological model of dark matter with an equation-of-state that is negative and changing at late times. We show this couples the $H_{0}$ and $\sigma_{8}$ tensions, providing an explanation for both simultaneously, while also providing an explanation for the anomalously large integrated Sachs-Wolfe (ISW) effect from cosmic voids. Observations of high ISW from cosmic voids may therefore be evidence that dark matter plays a significant role in the $H_{0}$ and $\sigma_{8}$ tensions. We predict the ISW from cosmic voids to be a factor of ~ 2 greater in this model than what is expected from the standard model $\Lambda$CDM.
K. Naidoo, M. Jaber, W. Hellwing, et. al.
Tue, 20 Sep 22
28/81
Comments: 5 pages (+references) and 3 figures. Comments welcome