论文标题
卵石冲突中的原动性磁盘电离
Ionizing Protoplanetary Disks in Pebble Collisions
论文作者
论文摘要
我们引入了固体的碰撞，作为原动性磁盘中气体的一种新的有效的电离机制，该机制特别在原始磁盘的密集中间平面中起作用。实验室实验激发了这个想法，我们发现通过谷物在相互碰撞（Tribo Charging）中交换的电荷并不与它们的表面相关。作为侧支效应的一种，电荷也被夹在气相中，即碰撞电离原球磁盘。因此，固体不仅是磁盘中的电荷下沉，而且是来源。第一个估计表明，中间平面的电离速率在1 au的范围内为$ 10^{ - 19} ... 10^{ - 15} \ rm \，s^{ - 1} $似乎可行，这取决于相当平静或高度湍流的条件，radial粒子堆积着。
We introduce collisions of solids as a new and efficient ionization mechanism for gas in protoplanetary disks, which especially operates in the dense midplane of protoplanetary disks. This idea is sparked by laboratory experiments where we found that charge, which is exchanged by grains in mutual collision (tribocharging), is not tied to their surfaces alone. As kind of collateral effect, charges also become entrained into the gas phase, i.e. collisions ionize the protoplanetary disk. Therefore, solids are not only sinks of charges in disks but also sources. A first estimate shows that ionization rates in the midplane at 1 AU in the range of $10^{-19} ... 10^{-15} \rm \, s^{-1}$ seem feasible depending on the assumption of rather calm or highly turbulent conditions with radial particle pile up.
