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

doi:10.1017/S1743921313000525

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 proceeding › Chapter › peer-review

Abstract

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 language	English
Title of host publication	Molecular Gas, Dust, and Star Formation in Galaxies
Editors	Tony Wong, Jürgen Ott
Place of Publication	Cambridge
Publisher	Cambridge University Press (CUP)
Pages	83-86
Number of pages	4
Volume	8
ISBN (Print)	9781107033818
DOIs	https://doi.org/10.1017/S1743921313000525
Publication status	Published - Aug 2012
Externally published	Yes
Event	IAU Symposium 292 - Beijing, China Duration: 20 Aug 2012 → 24 Aug 2012

Publication series

Name	Proceedings of the International Astronomical Union
Number	S292
Volume	8
ISSN (Print)	17439213
ISSN (Electronic)	17439221

Conference

Conference	IAU Symposium 292
Country/Territory	China
City	Beijing
Period	20/08/12 → 24/08/12

Keywords

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

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10.1017/S1743921313000525

Cite this

Dawson, J. R., McClure-Griffiths, N. M., Fukui, Y., Dickey, J., Wong, T., Hughes, A., & Kawamura, A. (2012). The supershell-molecular cloud connection in the Milky Way and beyond. In T. Wong, & J. Ott (Eds.), Molecular Gas, Dust, and Star Formation in Galaxies (Vol. 8, pp. 83-86). (Proceedings of the International Astronomical Union; Vol. 8, No. S292). Cambridge University Press (CUP). https://doi.org/10.1017/S1743921313000525

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title = "The supershell-molecular cloud connection in the Milky Way and beyond",

abstract = "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%.",

keywords = "galaxies: ISM, ISM: bubbles, ISM: evolution, ISM: molecules, Magellanic Clouds",

author = "Dawson, {J. R.} and McClure-Griffiths, {N. M.} and Y. Fukui and J. Dickey and T. Wong and A. Hughes and A. Kawamura",

year = "2012",

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doi = "10.1017/S1743921313000525",

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editor = "Tony Wong and J{\"u}rgen Ott",

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Dawson, JR, McClure-Griffiths, NM, Fukui, Y, Dickey, J, Wong, T, Hughes, A & Kawamura, A 2012, The supershell-molecular cloud connection in the Milky Way and beyond. in T Wong & J Ott (eds), Molecular Gas, Dust, and Star Formation in Galaxies. vol. 8, Proceedings of the International Astronomical Union, no. S292, vol. 8, Cambridge University Press (CUP), Cambridge, pp. 83-86, IAU Symposium 292, Beijing, China, 20/08/12. https://doi.org/10.1017/S1743921313000525

The supershell-molecular cloud connection in the Milky Way and beyond. / Dawson, J. R.; McClure-Griffiths, N. M.; Fukui, Y. et al.
Molecular Gas, Dust, and Star Formation in Galaxies. ed. / Tony Wong; Jürgen Ott. Vol. 8 Cambridge: Cambridge University Press (CUP), 2012. p. 83-86 (Proceedings of the International Astronomical Union; Vol. 8, No. S292).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

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AU - Dawson, J. R.

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AU - Hughes, A.

AU - Kawamura, A.

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AB - 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%.

KW - galaxies: ISM

KW - ISM: bubbles

KW - ISM: evolution

KW - ISM: molecules

KW - Magellanic Clouds

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Dawson JR, McClure-Griffiths NM, Fukui Y, Dickey J, Wong T, Hughes A et al. The supershell-molecular cloud connection in the Milky Way and beyond. In Wong T, Ott J, editors, Molecular Gas, Dust, and Star Formation in Galaxies. Vol. 8. Cambridge: Cambridge University Press (CUP). 2012. p. 83-86. (Proceedings of the International Astronomical Union; S292). doi: 10.1017/S1743921313000525

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

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