论文标题
隐藏带有行星的原星盘重力不稳定性的签名
Hiding Signatures of Gravitational Instability in Protoplanetary Discs with Planets
论文作者
论文摘要
我们进行了三个维度的SPH模拟，以表明迁移的巨型行星强烈抑制自磨盘的螺旋结构。我们提出了模拟的阿尔玛连续观测，这些观察表明，在没有行星的情况下，很容易观察到由于引力不稳定而引起的螺旋臂。尽管在存在巨型行星的情况下，螺旋结构被迁移的行星抑制，从而在很大程度上带有带环和间隙结构的轴对称盘。我们对气体运动学的建模表明，可以使用光学上的薄13C16O来推断地球的存在。我们的结果表明，没有必要通过假设高尘埃气质量比来限制光盘的气体质量，以解释缺乏螺旋特征，否则这些特征在高质量盘中可能会预期。
We carry out three dimensional SPH simulations to show that a migrating giant planet strongly suppresses the spiral structure in self-gravitating discs. We present mock ALMA continuum observations which show that in the absence of a planet, spiral arms due to gravitational instability are easily observed. Whereas in the presence of a giant planet, the spiral structures are suppressed by the migrating planet resulting in a largely axisymmetric disc with a ring and gap structure. Our modelling of the gas kinematics shows that the planet's presence could be inferred, for example, using optically thin 13C16O. Our results show that it is not necessary to limit the gas mass of discs by assuming high dust-to-gas mass ratios in order to explain a lack of spiral features that would otherwise be expected in high mass discs.
