论文标题
与视差错误的masers的银河螺旋密度波的参数小于10％
Parameters of the Galactic Spiral Density Wave from Masers with Parallax Errors Less Than 10%
论文作者
论文摘要
我们研究了带有测量的VLBI三角视差和适当运动的银河系和无线电星的运动学。我们考虑了相对三角视差误差小于10 \％的masers，并从中确定了银河旋转参数。特别是，已发现星系的线性旋转速度$ r_0 $ $ 244.4 \ pm4.3 $ km s $ s $^{ - 1} $（对于采用的$ r_0 = 8.1 = 8.1 \ pm0.1 $ kpc）。我们已经对径向，残留切向和垂直的摩泽的速度进行了关节和单独的光谱分析。例如，从垂直的maser速度来看，我们估计了速度扰动$ f_w = 5.2 \ pm1.5 $ km s $ s $^{ - 1} $，带有波长$λ_W= 2.6 \ pm0.7 $ kpc，争论了螺旋密度波浪对Verpletict the the the the verpletict sellar velocities的影响。由于联合解决方案，我们估计了径向，$ f_r = 6.7 \ pm1.1 $ km s $ s $^{ - 1} $和切线，$f_θ= 2.6 \ pm1.2 $ pm1.2 $ s $ s $ s $ s $^{ - 1} $，VELOCITY PERTUFFEFFEFFEAL $λ= 2.1 \ pm0.3 $ kpc，以及银河螺旋密度波中的太阳阶段$χ_\ odot = -148 \ pm15^\ circ $。我们已经证实了Radcliffe波在属于本地臂的Masers和无线电星的空间分布中存在。
We have studied the kinematics of Galactic masers and radio stars with measured VLBI trigonometric parallaxes and proper motions. We have considered masers with relative trigonometric parallax errors less than 10\% and determined the Galactic rotation parameters from them. In particular, the linear rotation velocity of the Galaxy at the solar distance $R_0$ has been found to be $244.4\pm4.3$ km s$^{-1}$ (for the adopted $R_0=8.1\pm0.1$ kpc). We have performed a joint and separate spectral analysis of the radial, residual tangential, and vertical maser velocities. For example, from the vertical maser velocities we have estimated the velocity perturbation amplitude $f_W=5.2\pm1.5$ km s$^{-1}$ with the wavelength $λ_W=2.6\pm0.7$ kpc, arguing for the influence of the spiral density wave on the vertical stellar velocities. Based on 104 masers within 3 kpc of the Sun, as a result of the joint solution, we have estimated the radial, $f_R=6.7\pm1.1$ km s$^{-1}$, and tangential, $f_θ=2.6\pm1.2$ km s$^{-1}$, velocity perturbations, the perturbation wavelength $λ=2.1\pm0.3$ kpc, and the Sun's phase in the Galactic spiral density wave $χ_\odot=-148\pm15^\circ$. We have confirmed the presence of the Radcliffe wave in the spatial distribution of masers and radio stars belonging to the Local Arm.
