论文标题
GAIA DR2目录的预序序列星的运动学
Kinematics of pre-main sequence stars from the Gaia DR2 catalog
论文作者
论文摘要
研究了尚未达到主序列阶段的年轻恒星的运动学特性。这些恒星的选择最近由Marton等人进行。 （2019）和Vioque等。 （2020）根据GAIA DR2目录，使用许多光度红外调查。我们已经确定了银河系的旋转参数和残余速度的椭圆形的参数。使用4431恒星发现的太阳能区域圆形区域的圆形旋转的线性速度等于V_0 = 229.1+-4.4 km/s。其残留速度的以下椭圆形参数来自低质量恒星（T型tau）：$σ_{1,2,3} =（9.45,6.99,6.6.61）\ pm（0.94,0.43,43,32）$ km/s。对于中间质量（Herbig ae/be stars）的恒星，它们的值证明是更大的$σ_{1,2,3} =（13.67,9.25,7.26）\ pm（2.40,2.44,0.88）$ km/s。两个目录的遥远恒星很好地追踪了当地的螺旋臂。对于1212颗恒星，对局部螺旋臂的螺距角度的新估计值等于I = -8.9+-0.1度。
The kinematic properties of young stars that have not yet reached the stage of the main sequence are studied. The selection of these stars was recently carried out by Marton et al. (2019) and Vioque et al. (2020) according to the Gaia DR2 catalog using a number of photometric infrared surveys. We have determined the rotation parameters of the Galaxy and the parameters of the ellipsoids of the residual velocities. The linear velocity of the circular rotation of a solar region around the center of the Galaxy, found using 4431 stars, is equal to V_0=229.1+-4.4 km/s. The following ellipsoid parameters of their residual velocities are found from low-mass stars (of type T Tau): $σ_{1,2,3}=(9.45,6.99,6.61)\pm(0.94,0.43,0.32)$ km/s. For stars of intermediate masses (Herbig Ae/Be stars), their values turned out to be somewhat larger $σ_{1,2,3}=(13.67,9.25,7.26)\pm(2.40,2.44,0.88)$ km/s. Distant stars from both Catalogs trace the local spiral arm well. For 1212 stars, a new estimate of the pitch angle of the Local spiral arm is equal to i=-8.9+-0.1 deg.
