Early Phases of Protostellar Discs:Studies with radiation transfer magneto-hydrodynamic simulations

圆盘和圆盘状结构在恒星和行星的形成中起着重要作用。由于角动量守恒，在年轻的恒星天体从坍缩的云核聚集起来的过程中，盘状物将不可避免地在它们周围形成。然而，目前还不清楚在哪个状态盘第一次出现在原恒星周围，以及在盘演化的早期阶段预期的观测特征是什么。同样从理论上来说，我们还不清楚那些被旋转结构包围的深埋的年轻原恒星会有什么样的特征。因此，本项目的目的是利用辐射转移磁流体动力学模拟（RT-MHD）研究盘演化的早期阶段。

Discs and disc-like structures play a fundamental role in the formation of stars and planets. Due to angular-momentum conservations it is inevitable that discs will build up around young stellar objects during their assembly from collapsing cloud cores. Yet it is not clear during which state discs first appear around protostars and what are the expected observational signatures during the early phases of disc evolution. Also form the theoretical point of few, it is not clear what kind of signatures one should expect from those deeply embedded young protostars surrounded by rotating structures. Hence, the aim of this proposed project is to study the early phases of disc evolution with radiation-transfer magneto-hdyrdodynamical simulations (RT- MHD).