Are supernovae driving turbulence in the solar neighborhood?
Abstract
Context: Turbulence plays an important role in shaping the interstellar medium, and it strongly influences star formation. Aims: We aim to identify the physical processes capable of sustaining H i turbulence in the solar neighborhood. Methods. We compare recent H i line-of-sight velocity observations within a volume of radius 70-500 pc centered on the Sun with a suite of 1 kpc numerical simulations that include two distinct turbulent drivers: (i) supernova (SN) feedback and (ii) imposed largescale turbulent forcing. For each simulation, we constructed synthetic sky maps that closely mimic the observational one, allowing for a consistent comparison between the simulations and the observational data. Results: The H i observations show a median velocity dispersion of 11.1 km s -1 in the solar neighborhood. The SN-driven simulations systematically underpredict this value, yielding dispersions in the range 4.9-6.7 km s -1 . We find that the simulations with strong enough large-scale forcing can reproduce not only the median observed velocity dispersion but also the observed velocity distribution.
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BibTeX
@article{abboudeh2026supernovae,
title = {{Are supernovae driving turbulence in the solar neighborhood?}},
author = {Georges Abboudeh and Patrick Hennebelle and Juan D Soler and Noé Brucy and Tine Colman and Ralf Klessen and Marc-Antoine Miville-Deschênes and Sergio Molinari and Alice Nucara and Veli-Matti Pelkonen and Alessio Traficante and Robin Tress},
journal = {Astronomy \& Astrophysics - A\&A},
year = {2026},
month = oct,
doi = {10.1051/0004-6361/202659062},
eprint = {2603.13008},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05797934v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Are supernovae driving turbulence in the solar neighborhood?
AU - Georges Abboudeh
AU - Patrick Hennebelle
AU - Juan D Soler
AU - Noé Brucy
AU - Tine Colman
AU - Ralf Klessen
AU - Marc-Antoine Miville-Deschênes
AU - Sergio Molinari
AU - Alice Nucara
AU - Veli-Matti Pelkonen
AU - Alessio Traficante
AU - Robin Tress
PY - 2026
DA - 2026/10/13
JO - Astronomy & Astrophysics - A&A
DO - 10.1051/0004-6361/202659062
UR - https://hal.science/hal-05797934v1
AB - Context: Turbulence plays an important role in shaping the interstellar medium, and it strongly influences star formation. Aims: We aim to identify the physical processes capable of sustaining H i turbulence in the solar neighborhood. Methods. We compare recent H i line-of-sight velocity observations within a volume of radius 70-500 pc centered on the Sun with a suite of 1 kpc numerical simulations that include two distinct turbulent drivers: (i) supernova (SN) feedback and (ii) imposed largescale turbulent forcing. For each simulation, we constructed synthetic sky maps that closely mimic the observational one, allowing for a consistent comparison between the simulations and the observational data. Results: The H i observations show a median velocity dispersion of 11.1 km s -1 in the solar neighborhood. The SN-driven simulations systematically underpredict this value, yielding dispersions in the range 4.9-6.7 km s -1 . We find that the simulations with strong enough large-scale forcing can reproduce not only the median observed velocity dispersion but also the observed velocity distribution.
SN - 0004-6361
SN - 1432-0746
ER -