论文标题
使用预先的标量灰尘模型对WCD系统内的灰尘颗粒生长的探索
An exploration of dust grain growth within WCd systems using an advected scalar dust model
论文作者
论文摘要
尘埃生产是在与风相互作用的大型二元系统中观察到的最奇怪的现象之一。高温，紫外光子通量和剧烈冲击应破坏任何凝结的粉尘颗粒。但是，在某些极端情况下，已经观察到尘埃产量约为恒星风总质量损失率的30％。为了更好地理解这种现象，使用一系列产生碳相狼射线（WCD）系统的数值模型进行了参数空间探索。这些模型结合了一个被动标量灰尘模型，模拟了尘埃生长，破坏和辐射冷却。我们发现这些模拟产生了合理的防尘产量。尘埃产率的显着变化是由于改变恒星的质量损失率而引起的，质量损失率更高，导致尘埃增加的产量增加。同样，恒星之间的近距离轨道也导致了较高的尘埃屈服。最后，高速速度剪切，诱导开尔文 - 螺旋（KELMHOLTZ（KH）的不稳定性和风混合）大大增加了尘埃的产量。
Dust production is one of the more curious phenomena observed in massive binary systems with interacting winds. The high temperatures, UV photon flux and violent shocks should destroy any dust grains that condense. However, in some extreme cases dust production yields of approximately 30% of the total mass loss rate of the stellar winds have been observed. In order to better understand this phenomenon a parameter space exploration was performed using a series of numerical models of dust producing carbon phase Wolf-Rayet (WCd) systems. These models incorporated a passive scalar dust model simulating dust growth, destruction and radiative cooling. We find that reasonable dust yields were produced by these simulations. Significant changes in the dust yield were caused by changing the mass loss rates of the stars, with a greater mass loss rate contributing to increased dust yields. Similarly, a close orbit between the stars also resulted in higher dust yields. Finally, a high velocity wind shear, which induces Kelvin-Helmholtz (KH) instabilities and wind mixing, drastically increases the dust yields.
