The JCMT Gould Belt Survey: Understanding the influence of outflows on Gould Belt clouds
The JCMT Gould Belt Survey: Understanding the influence of outflows on Gould Belt clouds
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DOI：
10.1093/mnrasl/slv202
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发表时间：
2015-12
影响因子：
4.8
通讯作者：
E. Drabek-Maunder;J. Hatchell;J. Buckle;J. Francesco;J. Richer
中科院分区：
文献类型：
--
作者：
E. Drabek-Maunder;J. Hatchell;J. Buckle;J. Francesco;J. Richer
利用詹姆斯·克拉克·麦克斯韦望远镜（JCMT）的Gould Belt调查数据，对几个Gould Belt云的恒星形成区域的流出和能量学进行了meta分析。大多数区域都受到强烈的引力约束。有证据表明，分子外流输送了大量的动量和能量。在研究的所有区域中，流出能量至少占总湍流动能的20%，并大于一半区域的湍流能量。然而，我们没有发现流出增加湍流水平的证据，并且流出和湍流能量之间没有相关性。尽管某些地区的流出对维持湍流水平对抗耗散有重要贡献，但这依赖于流出与大块运动的有效耦合。其他机制（如超新星）肯定是这些区域中大多数（如果不是全部的话）湍流的主要驱动因素。
Using James Clerk Maxwell Telescope (JCMT) Gould Belt Survey data from CO J = 3 → 2 isotopologues, we present a meta-analysis of the outflows and energetics of star-forming regions in several Gould Belt clouds. The majority of the regions are strongly gravitationally bound. There is evidence that molecular outflows transport large quantities of momentum and energy. Outflow energies are at least 20 per cent of the total turbulent kinetic energies in all of the regions studied and greater than the turbulent energy in half of the regions. However, we find no evidence that outflows increase levels of turbulence, and there is no correlation between the outflow and turbulent energies. Even though outflows in some regions contribute significantly to maintaining turbulence levels against dissipation, this relies on outflows efficiently coupling to bulk motions. Other mechanisms (e.g. supernovae) must be the main drivers of turbulence in most if not all of these regions.