Turbulence in Giant Molecular Clouds: The effect of photoionisation feedback
Turbulence in Giant Molecular Clouds: The effect of photoionisation feedback
复制标题
巨型分子云中的湍流:光电离反馈的影响
DOI:
10.1093/mnras/stu2498
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Barbara Ercolano
中科院分区:
文献类型:
--
作者:
D. M. Boneberg;James E. Dale;P. Girichidis;Barbara Ercolano
Giant Molecular Clouds (GMCs) are observed to be turbulent, but theory shows that without a driving mechanism turbulence should quickly decay. The question arises by which mechanisms turbulence is driven or sustained. It has been shown that photoionising feedback from massive stars has an impact on the surrounding GMC and can for example create vast HII bubbles. We therefore address the question of whether turbulence is a consequence of this effect of feedback on the cloud. To investigate this, we analyse the velocity field of simulations of high mass star forming regions by studying velocity structure functions and power spectra. We find that clouds whose morphology is strongly affected by photoionising feedback also show evidence of driving of turbulence by preserving or recovering a Kolmogorov-type velocity field. On the contrary, control run simulations without photoionising feedback have a velocity distribution that bears the signature of gravitational collapse and of the dissipation of energy, where the initial Kolmogorov-type structure function is erased.
影响因子:
4.8
作者:
J. Dale;B. Ercolano;I. Bonnell
通讯作者:
J. Dale;B. Ercolano;I. Bonnell
影响因子:
4.8
作者:
Ngoumou;Ercolano;Bonnell
通讯作者:
Bonnell
DOI:
10.1088/0004-637x/731/1/62
发表时间:
2011
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Christoph Federrath;Sharanya Sur;Dominik R. G Schleicher;Robi Banerjee;Ralf S. Klessen
通讯作者:
Ralf S. Klessen