Journal Article

Ionizing feedback from massive stars in massive clusters: fake bubbles and untriggered star formation

James E. Dale and Ian Bonnell

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 414, issue 1, pages 321-328
Published in print June 2011 | ISSN: 0035-8711
Published online June 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.18392.x
Ionizing feedback from massive stars in massive clusters: fake bubbles and untriggered star formation

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We use Smoothed Particle Hydrodynamics to simulate the formation of a massive (106 M) stellar cluster system formed from the gravitational collapse of a turbulent molecular cloud. We investigate the hierarchical clustering properties of our model system and we study the influence of the photoionizing radiation produced by the system's multiple O-type stars on the evolution of the protocluster. We find that dense gas near the ionizing sources prevents the radiation from eroding the filaments in which most of the star formation occurs and that instead, ionized gas fills pre-existing voids and bubbles originally created by the turbulent velocity field.

Keywords: stars: formation; H ii regions

Journal Article.  5194 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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