原型碰撞风风车WR 104
The prototype colliding-wind pinwheel WR 104
摘要：
最广泛的研究结果的原型“风车”星云WR 104周围的时间演变的尘埃结构。包括11个历元在三个近红外滤波器带通，一个均匀的成像数据集跨越6年以上（或10个轨道）。数据是从非常成功的凯克孔径掩蔽实验中获得的，该实验可以以极高的角分辨率恢复高保真图像，以前所未有的精度揭示羽流的几何形状。推断的（未解决的）潜在的双星和风系统的性质是轨道周期241.5 +/- 0.5天和角流出速度0.28 +/- 0.02质量/天。一个光学薄腔角大小13.3 +/- 1.4质量被发现位于中央双星和螺旋尘埃羽的开始之间。旋转运动的风系统引起的双轨道被发现有重要的影响：纠缠的风的结果在强烈的冲击活动下游远离鼻的弓形激波。参与碰撞的风的更大部分可能在气体压缩和尘埃在中心双星和激波停滞点的大半径处的成核中发挥关键作用。辐射制动的影响的调查指向简单的流体静力碰撞风的几何形状的显着修改，扩展这种现象的相关性，以更广泛的二元系统比以前考虑的。对最大允许轨道偏心率的限制是e < 0.06，这有力地证明了这个系统中存在着潮汐循环的史前史。最后，我们讨论了地球的极地（i < 16度）的有利位置到一个系统可能在未来的时代主机超新星爆炸的影响。
英文摘要：
Results from the most extensive study of the time-evolving dust structure around the prototype "Pinwheel" nebula WR 104 are presented. Encompassing 11 epochs in three near-infrared filter bandpasses, a homogeneous imaging data set spanning more than 6 years (or 10 orbits) is presented. Data were obtained from the highly successful Keck Aperture Masking Experiment, which can recover high fidelity images at extremely high angular resolutions, revealing the geometry of the plume with unprecedented precision. Inferred properties for the (unresolved) underlying binary and wind system are orbital period 241.5 +/- 0.5 days and angular outflow velocity of 0.28 +/- 0.02 mas/day. An optically thin cavity of angular size 13.3 +/- 1.4 mas was found to lie between the central binary and the onset of the spiral dust plume. Rotational motion of the wind system induced by the binary orbit is found to have important ramifications: entanglement of the winds results in strong shock activity far downstream from the nose of the bowshock. The far greater fraction of the winds participating in the collision may play a key role in gas compression and the nucleation of dust at large radii from the central binary and shock stagnation point. Investigation of the effects of radiative braking pointed towards significant modifications of the simple hydrostatic colliding wind geometry, extending the relevance of this phenomena to wider binary systems than previously considered. Limits placed on the maximum allowed orbital eccentricity of e < 0.06 argue strongly for a prehistory of tidal circularization in this system. Finally we discuss the implications of Earth's polar (i < 16 deg) vantage point onto a system likely to host supernova explosions at future epochs.
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