中文

基于Gaia DR3数据与VLBI测量的光学与射电参考架联系

星系天体物理 2023-05-16 v2

摘要

基于已发表数据,我们汇编了126颗射电星的样本,其三角视差和自行由VLBI测得并收录于Gaia DR3星表(实为Gaia EDR3)。基于刚体相互旋转模型对84颗射电星的Gaia–VLBI自行差进行分析,未发现显著异于零的旋转分量,(ωx,ωy,ωz)=(0.06,0.08,0.10)±(0.06,0.07,0.08)(\omega_x,\omega_y,\omega_z)=(0.06,0.08,-0.10)\pm(0.06,0.07,0.08) mas yr1^{-1}。基于90颗星的三角视差差,我们获得了光学与射电参考架间系统偏差的新估计,Δπ=0.022±0.017\Delta\pi=-0.022\pm0.017 mas,并表明视差尺度因子接近于1,b=1.001±0.002b=1.001\pm0.002

关键词

引用

@article{arxiv.2302.04080,
  title  = {Link between the Optical and Radio Frames from Gaia DR3 Data and VLBI Measurements},
  author = {Vadim V. Bobylev},
  journal= {arXiv preprint arXiv:2302.04080},
  year   = {2023}
}

备注

10 pages, 2 figures, 4 tables