Revealing the Spectral Properties of Galactic Interstellar Medium by Survey Observations

Fuente: arXiv
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Autores principales: Xiao, Ya-Wen, Zhang, Jian-Fu, Lazarian, Alex
Formato: Preprint
Publicado: 2026
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author Xiao, Ya-Wen
Zhang, Jian-Fu
Lazarian, Alex
author_facet Xiao, Ya-Wen
Zhang, Jian-Fu
Lazarian, Alex
contents Based on multi-frequency radio polarization survey datasets, we investigate the spectral characteristics of the Galactic interstellar medium (ISM) using the polarization frequency analysis (PFA) method, referred to as polarization variance. By comparing this novel PFA technique with the traditional power spectrum approach, and by cross-examining data from two distinct surveys, we aim to reinforce the robustness of our findings. Our analysis reveals that the ISM scaling slope in the Galactic disk is steeper than the classic Kolmogorov slope, whereas the ISM scaling slope in the Galactic halo aligns with the Kolmogorov slope. We suggest a distinct turbulence cascade process operating in the Galactic halo compared to the Galactic disk.
format Preprint
id arxiv_https___arxiv_org_abs_2603_17464
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Revealing the Spectral Properties of Galactic Interstellar Medium by Survey Observations
Xiao, Ya-Wen
Zhang, Jian-Fu
Lazarian, Alex
High Energy Astrophysical Phenomena
Based on multi-frequency radio polarization survey datasets, we investigate the spectral characteristics of the Galactic interstellar medium (ISM) using the polarization frequency analysis (PFA) method, referred to as polarization variance. By comparing this novel PFA technique with the traditional power spectrum approach, and by cross-examining data from two distinct surveys, we aim to reinforce the robustness of our findings. Our analysis reveals that the ISM scaling slope in the Galactic disk is steeper than the classic Kolmogorov slope, whereas the ISM scaling slope in the Galactic halo aligns with the Kolmogorov slope. We suggest a distinct turbulence cascade process operating in the Galactic halo compared to the Galactic disk.
title Revealing the Spectral Properties of Galactic Interstellar Medium by Survey Observations
topic High Energy Astrophysical Phenomena
url https://arxiv.org/abs/2603.17464