论文标题
激发和发掘南部螃蟹的爪子
Excitation & Excavation of the Claws of the Southern Crab
论文作者
论文摘要
我们表明，南部螃蟹（又名Hen2-104）提出了一个吉祥的机会，可以研究无形风的形式和速度，这些风的形式和速度与近距离和高度进化的二元星星相关的各种双极星云的裂片。 Hen2-104的深度三色覆盖层表明，其叶边缘的电离状态或“爪”的电离状态随着壁纬度的增加而稳步增加，从单独的电离值稳定增加。这种“反向”电离模式在行星星云（和类似的物体）之间是独特的，并且与中心来源的紫外线光电离不兼容。我们表明，对电离模式的最自矛盾的解释是通过快速（〜600 km S^-1）“锥形”恒星风的冲击电离，其中风的速度和动量通量随赤道延迟而增加。我们提出了一个流体动力模拟，该模拟将纬度依赖性形式，调节壁和Hen2-104外叶的反向电离置于统一的环境中。
We show that the Southern Crab (aka Hen2-104) presents an auspicious opportunity to study the form and speed of the invisible winds that excavate and shock the lobes of various types of bipolar nebulae associated with close and highly evolved binary stars. A deep three-color image overlay of Hen2-104 reveals that the ionization state of its lobe edges, or "claws", increases steadily from singly to doubly ionized values with increasing wall latitude. This "reverse" ionization pattern is unique among planetary nebulae (and similar objects) and incompatible with UV photoionization from a central source. We show that the most self-consistent explanation for the ionization pattern is shock ionization by a fast (~600 km s^-1) "tapered" stellar wind in which the speed and momentum flux of the wind increase with equatorial latitude. We present a hydrodynamic simulation that places the latitude-dependent form, the knotty walls, and the reverse ionization of the outer lobes of Hen2-104 into a unified context.
