Two Surveys, Same Signal: Independent Evidence for Environmental Modulation of Peculiar Velocities

Key Points

• The research aims to replicate the Cosmicflows-4 peculiar-velocity signal using the 6dFGSv survey to evaluate environmental effects.
• Conducted independent statistical tests on data from the 6dFGSv survey and Cosmicflows-4.
• Compared peculiar velocities of galaxies in void-like and denser environments.
• Galaxies in void-like environments show larger peculiar-velocity amplitudes compared to those in denser regions (p<0.01).
• Statistical tests consistently indicate a significant environmental imprint on nearby peculiar-velocity fields.

Abstract