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A resolved outflow of matter from a brown dwarf

机译：已解决的物质从棕矮星流出

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摘要

The birth of stars involves not only accretion but also, counterintuitively, the expulsion of matter in the form of highly supersonic outflows(1,2). Although this phenomenon has been seen in young stars, a fundamental question is whether it also occurs among newborn brown dwarfs: these are the so-called 'failed stars', with masses between stars and planets, that never manage to reach temperatures high enough for normal hydrogen fusion to occur(3). Recently, evidence for accretion in young brown dwarfs has mounted(4-6), and their spectra show lines that are suggestive of outflows(7-9). Here we report spectro-astrometric data that spatially resolve an outflow from a brown dwarf. The outflow's characteristics appear similar to, but on a smaller scale than, outflows from normal young stars. This result suggests that the outflow mechanism is universal, and perhaps relevant even to the formation of planets.
机译：恒星的诞生不仅涉及增生，而且还与直觉上相反，涉及以高超音速流出形式排出物质（1,2）。尽管这种现象已经出现在年轻的恒星中，但是一个基本的问题是，它是否还会在新生的棕矮星中发生：这些所谓的“失败的恒星”，质量介于恒星和行星之间，永远无法达到足够高的温度发生正常的氢融合（3）。最近，越来越多的证据表明在年轻的褐矮星中有增生的迹象（4-6），并且它们的光谱显示出暗示流出的线（7-9）。在这里，我们报告的光谱天文数据在空间上解决了褐矮星的流出问题。流出的特征看起来与正常年轻恒星的流出相似，但规模较小。这一结果表明，外流机制是普遍的，甚至可能与行星的形成有关。

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