Work

Kolmogorov analysis of JWST deep survey galaxies

Year: 2025

Type: article

Abstract: JWST galaxy deep spectral surveys provide a unique opportunity to trace a broad range of evolutionary features of galaxies and the intergalactic medium given the huge distance the photons are propagating. We have analyzed the spectral data of JWST galaxies up to a redshift of around 7 using the Kolmogorov technique, which is an efficient tool for testing the tiny comparative randomness properties of cumulative signals, that is, for distinguishing the contributions of regular and stochastic sub-signals. Our aim is to determine if certain identical spectral features of galaxies have undergone any distortions or systematic evolution across a broad range of redshifts. Our results indicate a change in the spectral properties of the sample galaxies at around z ≃ 2.7 at over a 99% confidence level.

Source: Astronomy and Astrophysics

DOI: 10.1051/0004-6361/202554745

Authors: N. Galikyan, A. A. Kocharyan, V. G. Gurzadyan

Institutions: A. Alikhanyan National Laboratory, Yerevan State University, National Research Nuclear University MEPhI, Monash University, Sapienza University of Rome

Language: English

Topic: Galaxies: Formation, Evolution, Phenomena

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,865

Funders: National Aeronautics and Space Administration, Space Telescope Science Institute