Dark Matter Halos in Interacting Dark Energy Models: Formation History, Density Profile, Spin and Shape

Understand

The interacting dark energy (IDE) model, which considers the interaction between dark energy and dark matter, provides a natural mechanism to alleviate the coincidence problem and can also relieve the observational tensions under the $\Lambda$CDM model.

• Previous studies have put constraints on IDE models by observations of cosmic expansion history, cosmic microwave background and large-scale structures.
• However, these data are not yet enough to distinguish IDE models from $\Lambda$CDM effectively.
• Because the non-linear structure formation contains rich cosmological information, it can provide additional means to differentiate alternative models.