Comment on "Indefinitely Flat Circular Velocities and the Baryonic Tully-Fisher Relation from Weak Lensing"

TL;DR

This paper critiques recent weak lensing measurements suggesting flat circular velocity curves beyond galaxy virial radii, proposing cosmic geometry effects as an alternative explanation to LCDM predictions.

Contribution

It introduces the idea that cosmic geometry influences galactic velocities, challenging the interpretation of flat rotation curves as evidence against LCDM.

Findings

Cosmic forces from universe geometry can increase galactic velocities.

Flat velocity curves may be explained by cosmic effects, not dark matter.

Contradictions with LCDM simulations can be addressed by considering cosmic geometry.

Abstract

The recent measurements of circular velocity curves from weak lensing of the isolated galaxies lead to a conclusion that the circular velocity curves remain flat well beyond the virial radii of dark matter halos up to 1 Mpc. This is in clear contradiction with the LCDM numerical simulations. We show that the additional cosmic force originating from the geometry of the Universe beyond the Friedmann model increases the circular velocities of the test galactic bodies and avoids a decline of the standard LCDM velocity curves.