The Local Void is Really Empty

TL;DR

This paper investigates whether the Local Void is truly empty or just low in matter, providing evidence that it is likely very large and devoid of matter, influencing galaxy motions.

Contribution

It presents observational evidence supporting that the Local Void is significantly empty and large, affecting local galaxy velocities.

Findings

Evidence of high-velocity expansion away from the Local Void

The Local Void is likely very large and devoid of matter

Void evacuation influences galaxy motions

Abstract

Are voids in the distribution of galaxies only places with reduced matter density and low star formation efficiency or are they empty of matter? There is now compelling evidence of expansion away from the Local Void at very high velocities. The motion is most reasonably interpreted as an evacuation of the void, which requires that the void be very large and very empty.