Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 436, Issue 4, Pages 3430-3445Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt1822
Keywords
stars: formation
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Funding
- DFG cluster of excellence 'Origin and Structure of the Universe'
- European Research Council
- STFC [ST/G001987/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G001987/1] Funding Source: researchfish
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We examine the effect of momentum-driven OB-star stellar winds on a parameter space of simulated turbulent giant molecular clouds using smoothed particle hydrodynamic simulations. By comparison with identical simulations in which ionizing radiation was included instead of winds, we show that momentum-driven winds are considerably less effective in disrupting their host clouds than are H ii regions. The wind bubbles produced are smaller and generally smoother than the corresponding ionization-driven bubbles. Winds are roughly as effective in destroying the very dense gas in which the O stars are embedded, and thus shutting down the main regions of star-forming activity in the model clouds. However, their influence falls off rapidly with distance from the sources, so they are not as good at sweeping up dense gas and triggering star formation further out in the clouds. As a result, their effect on the star formation rate and efficiency is generally more negative than that of ionization, if they exert any effect at all.
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