A closer look at the cosmological implications of the $\Lambda$HDE model

Understand

In a previous paper, we proposed a heterotic dark energy model, called $\Lambda$HDE, in which dark energy is composed of two components: cosmological constant (CC) and holographic dark energy (HDE).

• The aim of this work is to give a more comprehensive and systematic investigation on the cosmological implications of the $\Lambda$HDE model.
• Firstly, we make use of the current observations to constrain the $\Lambda$HDE model, and compare its cosmology-fit results with the results of the $\Lambda$CDM and the HDE model.
• Then, by combining a qualitative theoretical analysis with a quantitative numerical study, we discuss the impact of considering curvature on the cosmic evolutions of fractional HDE density $\Omega_{hde}$ and fractional CC density $\Omega_{\Lambda}$, as well as on the ultimate cosmic fate.