A simultaneous solution to the Hubble tension and observed bulk flow within 250 ${h^{-1}}$ Mpc

Understand

The $\Lambda$ cold dark matter ($\Lambda$CDM) standard cosmological model is in severe tension with several cosmological observations.

• Foremost is the Hubble tension, which exceeds $5\sigma$ confidence.
• Galaxy number counts show the Keenan-Barger-Cowie (KBC) supervoid, a significant underdensity out to 300~Mpc that cannot be reconciled with $\Lambda$CDM cosmology.
• Haslbauer et al.