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Updated: Aug 24, 2025

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
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A 0.6 Mpc H I structure associated with Stephan's Quintet

C K Xu1,2, C Cheng3,4, P N Appleton5

  • 1Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, CAS, Beijing, People's Republic of China. congxu@nao.cas.cn.

Nature
|October 19, 2022
PubMed
Summary

Stephan's Quintet shows a large atomic hydrogen structure, suggesting early tidal interactions. This discovery challenges our understanding of gas survival in galaxy groups over long timescales.

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