标题： 原行星盘内部尘埃区域 -- III. 辐射压非径向分量在尘埃动力学中的作用 显示英文标题

标题： Inner dusty regions of protoplanetary discs -- III. The role of non-radial radiation pressure in dust dynamics

摘要： 我们研究了内光学厚原行星盘表面尘埃颗粒的动力学行为。 这是一个尘埃最热且对行星形成和尘埃演化极为重要的盘区域，但我们仍然难以理解塑造这一环境的所有力。 在我们的方法中，我们将两个独立数值研究的结果结合起来——一个是来自吸积盘磁流体力学模拟的风速和密度分布，另一个是高分辨率多粒径尘埃辐射转移。 在本系列的前一篇文章中，我们描述了如何利用这些结果作为重力、气体阻力和辐射压力驱动尘埃轨迹积分的环境输入。 现在我们有两个改进——我们将风密度和速度的时间变化纳入其中，并实现了非径向辐射压力力。 我们将我们的分析应用于Herbig Ae和T Tau星。 我们确认辐射压力力可以导致尘埃外流，尤其是在更亮的恒星情况下。 此外，它在内盘边缘反对尘埃吸积并减少尘埃沉降。 这些效应被盘风增强，特别是在恒星磁场和盘磁场相遇的区域。 我们的结果表明，尘埃颗粒可以在最热的盘区域停留较长时间，然后最终被喷射到外盘区域。 显示英文摘要

摘要： We explore dynamical behaviour of dust particles that populate the surface of inner optically thick protoplanetary discs. This is a disc region with the hottest dust and of a great importance for planet formation and dust evolution, but we still struggle to understand all the forces that shape this environment. In our approach we combine results from two separate numerical studies - one is the wind velocity and density distributions obtained from magnetohydrodynamical simulations of accretion discs, and the other is a high-resolution multigrain dust radiation transfer. In our previous paper in the series, we described the methodology for utilising these results as an environmental input for the integration of dust trajectories driven by gravity, gas drag, and radiation pressure. Now we have two improvements - we incorporate time changes in the wind density and velocity, and we implement the non-radial radiation pressure force. We applied our analysis on Herbig Ae and T Tau stars. We confirm that the radiation pressure force can lead to dust outflow, especially in the case of more luminous stars. Additionally, it opposes dust accretion at the inner disc edge and reduces dust settling. These effects are enhanced by the disc wind, especially in the zone where the stellar and the disc magnetic fields meet. Our results suggest that dust grains can stay in the hottest disc region for an extended period and then can end up ejected into the outer disc regions.