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arXiv 2001.03949astro-ph.EPastro-ph.SR
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由磁驱动风和光蒸发风的组合引起的原行星盘的扩散

Dispersal of protoplanetary disks by the combination of magnetically driven and photoevaporative winds

Masanobu Kunitomo, Takeru K. Suzuki, Shu-ichiro Inutsuka

备注：
11 pages, 6 figures; corrected Table 2 and Equations (17) and (29); see Erratum at https://doi.org/10.1093/mnras/stab2748
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摘要：

研究了磁驱动盘风（MDW）和热驱动光蒸发风（PEW）在原行星盘长期演化中的作用。我们开始模拟从早期阶段，其中磁盘质量是$0.118\,{\mathrm{M}_{\odot}}$周围的$1\,{\mathrm{M}_{\odot}}$明星和跟踪的演变，直到磁盘是完全分散。我们将质量损失PEW和质量损失和磁制动（风力矩）MDW，除了粘性吸积，粘性加热，和恒星辐射。我们发现，MDW和PEW分别有不同的角色：磁驱动风蒸发材料从内部磁盘在早期阶段，而光蒸发具有主导作用，在后期阶段的外部（$\gtrsim1\,$ au）磁盘。盘的寿命，这取决于MDW，PEW，和粘性吸积的组合，显示了一个大的变化的$\sim1$ - $20\,$ MYR的气体主要是分散的MDW和PEW的情况下，具有低粘度和寿命是敏感的质量损失率和扭矩的MDW，而寿命是不敏感的，当粘度高时，这些参数。即使在非常弱的湍流盘，MDW和PEW的合作，使磁盘分散在几个百万年。

英文摘要：

We investigate the roles of magnetically driven disk wind (MDW) and thermally driven photoevaporative wind (PEW) in the long-time evolution of protoplanetary disks. We start simulations from the early phase in which the disk mass is $0.118\,{\mathrm{M}_{\odot}}$ around a $1\,{\mathrm{M}_{\odot}}$ star and track the evolution until the disk is completely dispersed. We incorporate the mass loss by PEW and the mass loss and magnetic braking (wind torque) by MDW, in addition to the viscous accretion, viscous heating, and stellar irradiation. We find that MDW and PEW respectively have different roles: magnetically driven wind ejects materials from an inner disk in the early phase, whereas photoevaporation has a dominant role in the late phase in the outer ($\gtrsim1\,$au) disk. The disk lifetime, which depends on the combination of MDW, PEW, and viscous accretion, shows a large variation of $\sim1$-$20\,$Myr; the gas is dispersed mainly by the MDW and the PEW in the cases with a low viscosity and the lifetime is sensitive to the mass-loss rate and torque of the MDW, whereas the lifetime is insensitive to these parameters when the viscosity is high. Even in disks with very weak turbulence, the cooperation of MDW and PEW enables the disk dispersal within a few Myr.

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