The Role of Cold Gas in Massive Galaxy Evolution

Released on by Jenna Lemonias
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  • The Role of Cold Gas in Massive Galaxy Evolution Book Detail

  • Author : Jenna Lemonias
  • Release Date : 2014
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  • ISBN 13 :
  • File Size : 59,59 MB
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The Role of Cold Gas in Massive Galaxy Evolution by Jenna Lemonias PDF Summary

Book Description: Finally, in Chapter 4 we demonstrate the utility of scaling relations derived from large datasets by using the gas fraction scaling relation to select an anomalous sample of massive HI-rich galaxies with surprisingly low levels of star formation. We obtain HI imaging of these galaxies to ascertain why so much of their cold gas content is not participating in star formation. All of the galaxies we observe exhibit extended HI disks whose gas surface densities are below the threshold required for star formation. Since this type of galaxy is most prevalent at stellar masses above the transition mass noted in Kauffmann et al. (2003), it is possible that the processes inhibiting star formation in these galaxies contribute to the change in star-forming properties above the transition mass.

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The Role of Gas in Galaxy Evolution

The Role of Gas in Galaxy Evolution

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The story of a typical spiral galaxy like the Milky Way is a tale of the transformation of metal-poor hydrogen gas to heavier elements through nuclear burning i