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A HIGHLY COLLIMATED, EXTREMELY HIGH VELOCITY OUTFLOW IN TAURUS

机译:金牛座高度集合化,极高的速度外流

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摘要

We present the first case of a highly collimated, extremely high velocity bipolar outflow in Taurus. It is powered by the low-luminosity (0.4 solar luminosity) source IRAS 04166+2706 and contains gas accelerated up to 50 km s~(-1) with respect to the ambient cloud. At these highest velocities, the outflow collimation factor exceeds 20, and the gas displays a very high degree of spatial symmetry. This very fast gas presents multiple maxima, and most likely arises from the acceleration of ambient material by a time-variable jet-like stellar wind. When scaled for luminosity, the outflow parameters of IRAS 04166 are comparable to those of other extremely high velocity outflows, like L1448, indicating that even the very quiescent star-formation mode of Taurus produces objects capable of powering very high energy flows (L_(mec)/L_* > 0.15).
机译:我们提出金牛座高度准直,极高速双极流出的第一种情况。它由低光度(0.4太阳光度)源IRAS 04166 + 2706供电,相对于周围的云,其气体加速到50 km s〜(-1)。在这些最高速度下,流出准直因子超过20,气体显示出很高的空间对称性。这种非常快的气体具有多个最大值,最有可能是由随时间变化的喷射状恒星风对周围物质的加速而产生的。如果按光度进行缩放,则IRAS 04166的流出参数可与其他极高速度的流出参数(如L1448)相媲美,这表明即使是金牛座非常静止的恒星形成模式也能产生能够为非常高的能量流提供动力的物体(L_(mec )/ L_ *> 0.15)。

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