论文标题
T Tauri星的运动学来自Gaia DR2目录靠近太阳
Kinematics of T Tauri Stars Close to the Sun from the Gaia DR2 Catalogue
论文作者
论文摘要
已经研究了从半径500 pc的太阳邻域中的大量年轻T牛里星样本的空间和运动学特性。位置的以下参数椭圆形的参数是从Gould Belt的最可能成员确定的：它的尺寸为$ 350 \ times 270 \ times 87 $ 〜PC，其面向$ 14 \ pm1^\ circ $的角度，以$ 297 \ pm1^\ $ $ 297 \ pm1^\ $ $ 297 \ pm1^\ cir。对来自该样本的恒星运动的分析表明，带有主要半障碍的残留速度椭圆形$σ_{1,2,3} =（8.87,5.58,3.03）\ pm（0.10,0.20,0.04.04）$ 〜km s $ s $ s $ $ 298 \ pm2^\ circ $的上升节点的上升节点。已经确定，可以通过银河螺旋密度的波浪和径向呈辐射效果差异$ f_r \ sim 5 $ km s $ s $ s $ s $ s $ s $ s $ s $ s $ s $ s的影响来解释，已经确定了Gould Belt Stars典型的许多扩展效果（Kinematic $ K $效应），5--6 km S $^{ - 1} $ kpc $^{ - 1} $。
The spatial and kinematic properties of a large sample of young T Tauri stars from the solar neighborhood 500 pc in radius have been studied. The following parameters of the position ellipsoid have been determined from the most probable members of the Gould Belt: its sizes are $350\times 270 \times 87$~pc and it is oriented at an angle of $14\pm1^\circ$ to the Galactic plane with a longitude of the ascending node of $297\pm1^\circ$. An analysis of the motions of stars from this sample has shown that the residual velocity ellipsoid with principal semiaxes $σ_{1,2,3}=(8.87,5.58,3.03)\pm(0.10,0.20,0.04)$~km s$^{-1}$ is oriented at an angle of $22\pm1^\circ$ to the Galactic plane with a longitude of the ascending node of $298\pm2^\circ$. It has been established that much of the expansion effect (kinematic $K$ effect) typical for Gould Belt stars, 5--6 km s$^{-1}$ kpc$^{-1}$, can be explained by the influence of a Galactic spiral density wave with a radial perturbation amplitude $f_R\sim5$ km s$^{-1}$.
