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High star formation rates as the origin of turbulence in early and modern disk galaxies

Author

Listed:
  • Andrew W. Green

    (Centre for Astrophysics and Supercomputing, Swinburne University, PO Box 218, Hawthorn, Victoria 3122, Australia)

  • Karl Glazebrook

    (Centre for Astrophysics and Supercomputing, Swinburne University, PO Box 218, Hawthorn, Victoria 3122, Australia)

  • Peter J. McGregor

    (Research School of Astronomy and Astrophysics, Australian National University)

  • Roberto G. Abraham

    (University of Toronto, 50 St George Street, Toronto, Ontario M5S3H4, Canada)

  • Gregory B. Poole

    (Centre for Astrophysics and Supercomputing, Swinburne University, PO Box 218, Hawthorn, Victoria 3122, Australia)

  • Ivana Damjanov

    (University of Toronto, 50 St George Street, Toronto, Ontario M5S3H4, Canada)

  • Patrick J. McCarthy

    (Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street)

  • Matthew Colless

    (Australian Astronomical Observatory, PO Box 296)

  • Robert G. Sharp

    (Australian Astronomical Observatory, PO Box 296)

Abstract

Galactic turbulence: disk galaxies ancient and modern We live in a disk galaxy, yet have a very poor understanding of how they form — not helped by the fact that disk galaxies in the early Universe seem rather different to our Milky Way. Many of the disk galaxies of the early Universe are surprisingly large and far more turbulent than the Milky Way and other modern spirals. Now the discovery of a new sample of similarly unusual disk galaxies persisting to the present day adds a significant new element to this debate. In these galaxies, resembling the 'turbulent disks' observed in the early Universe, velocity dispersions correlate with their star-formation rates, which suggests that star formation itself is the energetic driver of galaxy disk turbulence at all cosmic epochs.

Suggested Citation

  • Andrew W. Green & Karl Glazebrook & Peter J. McGregor & Roberto G. Abraham & Gregory B. Poole & Ivana Damjanov & Patrick J. McCarthy & Matthew Colless & Robert G. Sharp, 2010. "High star formation rates as the origin of turbulence in early and modern disk galaxies," Nature, Nature, vol. 467(7316), pages 684-686, October.
    • Handle: RePEc:nat:nature:v:467:y:2010:i:7316:d:10.1038_nature09452
    DOI: 10.1038/nature09452
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