金牛T星在慢引力收缩阶段抛射物质和引力收缩作用下质量和半径的演化时标及其对自转角速度变化的影响

Evolutional Time Scale of Mass and Radius of T Tauri and Its Influence on the Rotation under the Action of the Ejected Material and Gravitational Contraction in the Step of the Slow Gravitational Contraction

研究了带有引力能源和抛射物质的引力收缩星如金牛T星处于慢引力收缩阶段后,在抛射物质和引力收缩联合作用下对质量和半径的改变及其对自转角速度变化产生的影响。给出了质量和半径随时间演变的联立微分方程组及其解。利用解计算了金牛T星的质量和半径的演化时标以及对自转角速度变化产生的影响。给出数值结果,并讨论了理论和数值结果。

The mass loss and radius contraction of T Tauri star under the role of the ejected material and gravitational contraction in the step of the slow gravitational contraction are studied. The evolutional equations determining the variation of mass and radius with time are established. The evolutional time scales of mass and radius are given. The influences of mass loss and radius contraction on the variation of the rotational angular velocity are given too. As example, the numerical effects of mass loss and radius contraction on the rotational relative angular velocity are estimated in Table. In addition the obtained results are discussed and concluded.