Massive stars in massive clusters - IV. Disruption of clouds by momentum-driven winds
Massive stars in massive clusters - IV. Disruption of clouds by momentum-driven winds
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大质量星团中的大质量恒星 - IV 动量驱动风对云层的破坏
DOI:
10.1093/mnras/stt1822
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发表时间:
2013
影响因子:
4.8
通讯作者:
Bonnell
中科院分区:
文献类型:
--
作者:
Ngoumou;Ercolano;Bonnell
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 Hiiregions. 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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发表时间:
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期刊:
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影响因子:
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