On scattering of CMB radiation on wormholes: kinetic SZ-effect

TL;DR

This paper investigates how wormholes scatter cosmic microwave background radiation, revealing that static wormholes do not affect the spectrum, but moving wormholes induce a kinetic SZ-effect similar to galaxy clusters, with complex velocity-dependent features.

Contribution

It introduces the concept of scattering of CMB radiation on wormholes and analyzes the resulting kinetic SZ-effect, including higher-order velocity effects and peculiar features of single wormhole scattering.

Findings

Static wormholes do not perturb the CMB spectrum.

Peculiar velocities of wormholes produce a kinetic SZ-effect.

Higher-order velocity effects lead to complex CMB spectrum dependence.

Abstract

The problem of scattering of CMB radiation on wormholes is considered. It is shown that a static gas of wormholes does not perturb the spectrum of CMB. In the first order by $v/c$ the presence of peculiar velocities gives rise to the dipole contribution in $\Delta T/T$, which corresponds to the well-known kinetic Sunyaev-Zel'dovich effect. In next orders there appears a more complicated dependence of the perturbed CMB spectrum on peculiar velocities. We also discuss some peculiar features of the scattering on a single wormhole.