# Wormhole Shadows in Rotating Dust

## TL;DR

This paper models the shadows of rotating dust around Ellis wormholes, revealing distorted bright rings and complex patterns that could be observable with future high-resolution telescopes.

## Contribution

It extends previous nonrotating dust models to include rotation, deriving steady-state solutions and analyzing the resulting observable wormhole shadows.

## Key findings

- Bright ring appears in the shadow, similar to Schwarzschild spacetime.
- Rotation causes distortion of the bright ring.
- Complex emission patterns from the other side of the wormhole are predicted.

## Abstract

As an extension of our previous work, which investigated the shadows of the Ellis wormhole surrounded by nonrotating dust, in this paper we study wormhole shadows in rotating dust flow. First, we derive steady-state solutions of slowly rotating dust surrounding the wormhole by solving relativistic Euler equations. Solving null geodesic equations and radiation transfer equations, we investigate the images of the wormhole surrounded by dust for the above steady-state solutions. Because the Ellis wormhole spacetime possesses unstable circular orbits of photons, a bright ring appears in the image, just as in Schwarzschild spacetime. The bright ring looks distorted due to rotation. Aside from the bright ring, there appear weakly luminous complex patterns by the emission from the other side of the throat. These structure could be detected by high-resolution very-long-baseline-interferometry observations in the near future.