PreprintCC BY 4.0arXiv
Evidence for Hierarchical Turbulent Scaling in Nearby Star-Forming Galaxies
Abstract
We find recurring signatures of intermittency in molecular-gas velocities from cloud to galactic scales. In 31 selected galaxies from PHANGS-ALMA, velocity-centroid exponents through sixth order show nonlinear order dependence and nearly linear relations between consecutive exponents across galaxies. Positive estimated offsets from single-exponent scaling occur in all 52 galaxies with a valid power law fit and 99 of 100 clouds. A generalized She-Leveque hierarchy accommodates these signatures, supporting a hierarchical description of turbulent scaling in molecular gas across these environments.
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BibTeX
@misc{scipio2026evidence,
title = {{Evidence for Hierarchical Turbulent Scaling in Nearby Star-Forming Galaxies}},
author = {Luna Maria Scipio and Fernando A. N. Santos and Jay Armas},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.16805},
eprint = {2610.16805},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.16805},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Evidence for Hierarchical Turbulent Scaling in Nearby Star-Forming Galaxies
AU - Luna Maria Scipio
AU - Fernando A. N. Santos
AU - Jay Armas
PY - 2026
DA - 2026/10/12
PB - arXiv
DO - 10.48550/arxiv.2610.16805
UR - https://arxiv.org/abs/2610.16805
AB - We find recurring signatures of intermittency in molecular-gas velocities from cloud to galactic scales. In 31 selected galaxies from PHANGS-ALMA, velocity-centroid exponents through sixth order show nonlinear order dependence and nearly linear relations between consecutive exponents across galaxies. Positive estimated offsets from single-exponent scaling occur in all 52 galaxies with a valid power law fit and 99 of 100 clouds. A generalized She-Leveque hierarchy accommodates these signatures, supporting a hierarchical description of turbulent scaling in molecular gas across these environments.
ER -