On the interacting dark energy scenarios $-$ the case for Hubble constant tension

Understand

The Hubble constant $H_0$ is one of the important cosmological parameters measuring the expansion rate of our universe at present moment.

• Over the last couple of years, $H_0$ has created an enormous amount of debates interests in the astrophysical and cosmological communities for its different estimations at many standard deviations by different observational surveys.
• The recent estimation of $H_0$ from the cosmic microwave background observations by Planck within the $\Lambda$-Cold Dark Matter ($\Lambda$CDM) paradigm is in tension with $\gtrsim 5 \sigma$ confidence with SH0ES (Supernovae and $H_0$ for the Equation of State of dark energy) collaboration.
• As a result, revision of the standard $\Lambda$CDM model has been suggested in various ways in order to examine whether such scenarios can solve this $H_0$ tension.