Limits to Seeing High-Redshift Galaxies Due to Planck-Scale-Induced Blurring

TL;DR

This paper explores the theoretical limits on observing high-redshift galaxies caused by Planck-scale quantum effects that could blur or fade distant astronomical images, impacting future telescope observations.

Contribution

It analyzes the potential impact of quantum spacetime effects on the visibility of distant galaxies, highlighting a fundamental resolution limit for upcoming telescopic observations.

Findings

Quantum spacetime may cause observable blurring at high redshifts.

Current evidence from gamma-ray bursts and active galactic nuclei is inconclusive.

Future telescopes could face fundamental limits in resolving early universe structures.

Abstract

In the last decade or so there has been debate over the possibility that the fuzzy quantum nature of spacetime might decohere wavefronts emanating from very distant sources. Consequences of that could be "blurred" or "faded" images of compact structures in galaxies, primarily at z>1 for their emitted X-rays and gamma-rays, but perhaps even in ultraviolet through optical light at higher redshift. So far there are only inconclusive hints of this from z~4 active-galactic nucleii and gamma-ray bursts viewed with Fermi and Hubble Space Telescope. If correct though, that would impose a significant, fundamental resolution limit for galaxies out to z~8 in the era of the James Webb Space Telescope and the next generation of ground-based telescopes using adaptive optics.