The supershell-molecular cloud connection in the Milky Way and beyond

J. R. Dawson*, N. M. McClure-Griffiths, Y. Fukui, J. Dickey, T. Wong, A. Hughes, A. Kawamura

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


The role of large-scale stellar feedback in the formation of molecular clouds has been investigated observationally by examining the relationship between Hi and 12CO(J=1-0) in supershells. Detailed parsec-resolution case studies of two Milky Way supershells demonstrate an enhanced level of molecularisation over both objects, and hence provide the first quantitative observational evidence of increased molecular cloud production in volumes of space affected by supershell activity. Recent results on supergiant shells in the LMC suggest that while they do indeed help to organise the ISM into over-dense structures, their global contribution to molecular cloud formation is of the order of only ∼ 10%.

Original languageEnglish
Title of host publicationMolecular Gas, Dust, and Star Formation in Galaxies
EditorsTony Wong, Jürgen Ott
Place of PublicationCambridge
PublisherCambridge University Press
Number of pages4
ISBN (Print)9781107033818
Publication statusPublished - Aug 2012
Externally publishedYes
EventIAU Symposium 292 - Beijing, China
Duration: 20 Aug 201224 Aug 2012

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)17439213
ISSN (Electronic)17439221


ConferenceIAU Symposium 292


  • galaxies: ISM
  • ISM: bubbles
  • ISM: evolution
  • ISM: molecules
  • Magellanic Clouds

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