Explaining Excess Dipole in NVSS Data Using Superhorizon Perturbation

Understand

Many observations in recent times have shown evidence against the standard assumption of isotropy in the Big Bang model.

• Introducing a superhorizon scalar metric perturbation has been able to explain some of these anomalies.
• In this work, we probe the net velocity arising due to the perturbation.
• We find that this extra component does not contribute to the CMB dipole amplitude while it does contribute to the dipole in large scale structures.