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June 1, 2026The Astrophysical JournalOpen Access

Multiscale Gas Structure and Dynamics in an Extragalactic Central Molecular Zone

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Authors

LWL J WangJ孙Jiayi 嘉懿 Sun 孙YTYu-Hsuan Teng

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Overview

Examines molecular gas dynamics in a galaxy's central region, highlighting variable motion sources across scales.

Key Points

  • The aim is to investigate the structures and dynamics of molecular gas in the central molecular zone of galaxy NGC 3351.
  • Used Atacama Large Millimeter/submillimeter Array CO (3–2) observations at 0.1" resolution
  • Applied dendrogram technique to analyze hierarchical molecular gas structures
  • Measured size, gas mass, and velocity dispersion across various spatial scales.
  • Found a power-law slope of 0.58 in the size–line width relation, indicating significant ordered motion contributions.
  • Discovered that ordered motions dominate in gas structures >30 pc, while random motions become prevalent <30 pc.
  • Estimated gravitational free-fall and crossing times indicate differences in gas motion dynamics at varying scales.

Cite This Study

Wang et al. (2026) studied this question.

synapsesocial.com/papers/6a1d208702fbce9130636e36https://doi.org/10.3847/1538-4357/ae6448
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