标题： 气体压力驱动的筛选力与 Pebble 聚集：行星形成中的增长途径 显示英文标题

标题： Gas Pressure Driven Screening Forces and Pebble Aggregation: A Pathway for Growth in Planet Formation

摘要： 从原行星盘中的厘米级尘埃颗粒形成星子面临重大障碍，包括碎片化和径向漂移。 我们识别出一种此前未考虑的屏蔽力，该力源于当尘埃颗粒间距低于气体平均自由程时，颗粒之间热气体粒子的相互屏蔽。 这种力有助于尘埃颗粒的结合，在湍流盘条件下克服关键的生长障碍。 与传统机制不同，屏蔽力不依赖于表面粘附力，并通过在高密度区域增强聚集来补充流体不稳定性及压力陷阱。 我们的分析预测，屏蔽相互作用在{中间盘区域（$ \sim 0.3$ 到几 AU）}时最有效，这与ALMA观测（例如TW Hya）中尘埃浓度增强的情况一致。 {此外，我们发现，从厘米到千米尺度的筛选引起的砾石增长可以在显著短于盘寿命的时间尺度上发生（$\sim 10^5$年）。 重要的是，当小于局部气体平均自由程的颗粒耗尽时，这种增长自然终止，从而避免了失控的吸积。}除了行星科学之外，屏蔽力对高能天体物理学、尘埃等离子体、受限粒子悬浮液和其他相关领域具有{潜力}的影响，表明其具有更广泛的 fundamental 意义。 显示英文摘要

摘要： The formation of planetesimals from cm-sized pebbles in protoplanetary disks faces significant barriers, including fragmentation and radial drift. We identify a previously unaccounted screening force, arising from mutual shielding of thermal gas particles between pebbles when their separation falls below the gas mean free path. This force facilitates pebble binding, overcoming key growth barriers under turbulent disk conditions. Unlike conventional mechanisms, screening forces operate independently of surface adhesion and complement streaming instability and pressure traps by enhancing aggregation in high-density regions. Our analysis predicts that screening interactions are most effective in the {middle disk regions ($ \sim 0.3$ to few AU),} consistent with ALMA observations (e.g., TW Hya) of enhanced dust concentrations. {Furthermore, we find that screening-induced pebble growth from centimeter to kilometer scales can occur on timescales significantly shorter than the disk lifetime ($\sim 10^5$ years). Importantly, this growth naturally terminates when particles smaller than the local gas mean free path are depleted, thereby avoiding runaway accretion.} Beyond planetary science, the screening forces have {potential} implications for high-energy astrophysics, dusty plasmas, confined particle suspensions and other relevant areas, suggesting a broader fundamental significance.