论文标题
辐射环盘的三维演化：内部腔的大小和形状
Three-dimensional evolution of radiative circumbinary discs: the size and shape of the inner cavity
论文作者
论文摘要
经常使用二维（2D）数值模拟来研究环盘和行星的演变，尽管最近的工作表明3D效应可能会大大改变二进制产生的内部空腔的结构。在这项研究中，我们介绍了围绕开普勒-16和开普勒-34系统类似物的环光盘的3D流体动力模拟的结果，包括恒星加热和辐射冷却对热盘结构的影响。我们发现，与他们的2D对应物相比，3D圆盘模型中空腔的结构似乎更快地达到了准平稳状态，并且在我们的一部分中，这是明确的证据。此外，与2D相比，3D的内腔的大小和偏心率更小。我们将这种差异归因于中平面上方的圆盘区域增强的螺旋波耗散，在该圆盘区域中，冷却时间是动态时间尺度的顺序，导致3D盘模型中的内腔大小较小。我们的结果表明，迁移的行星应在3D圆盘模型中将迁移靠近中央二进制，并指出在模拟电路盘和行星时包括3D结构的重要性。
The evolution of circumbinary discs and planets is often studied using two-dimensional (2D) numerical simulations, although recent work suggests that 3D effects may significantly alter the structure of the inner cavity created by the binary. In this study, we present the results of 3D hydrodynamical simulations of circumbinary discs that orbit around analogues of the Kepler-16 and Kepler-34 systems, including the effect of stellar heating and radiative cooling on the thermal disc structure. We find that compared to their 2D counterparts, the structures of the cavities in 3D circumbinary disc models appear to reach a quasi-stationary state more rapidly, and in a subset of our runs the evidence for this is unambiguous. Furthermore, the sizes and eccentricities of the inner cavity are smaller in 3D compared to 2D. We attribute this difference to enhanced spiral wave dissipation in disc regions above the midplane, where the cooling time is of the order of the dynamical timescale, resulting in smaller inner cavity sizes in 3D disc models. Our results suggest that migrating planets should park closer to the central binary in 3D models of circumbinary discs, and point to the importance of including the 3D structure when simulating circumbinary discs and planets.
