论文标题
黑洞阴影观察带有空间地面干涉仪
Black Hole Shadow Observations with Space-Ground Interferometers
论文作者
论文摘要
我们考虑黑洞（BH）阴影图像，可以通过数据处理和未来空间中的图像恢复过程来恢复，这是非常大的基线干涉仪（VLBI）任务。对于带有Sgra*，M87*和M31*的质量和坐标的Kerr BHS，在其后面的光源照亮，我们考虑三种观察：地面基于地面的干涉仪（类似于事件的望远镜望远镜），空间干涉仪与地面轨道和空间的卫星与A satellite的卫星在A satellite中的卫星干涉仪。仅基于地面望远镜产生的图像与带有添加低轨卫星的空间VLBI产生的图像之间的显着差异是由基线增加和（u，v）覆盖率的改善引起的。用于观察BH阴影的无线电干涉仪的近地构型对于在考虑情况下的BH阴影观察最可取。随着进一步增加轨道半径，直到拉格朗日点$ l_2 $（u，v）填充的密度降低，结果似乎不太可靠。呈现所有情况的模型图像。
We consider the black hole (BH) shadow images which can be restored by data processing and image recovery procedures in future space Very Large Baseline Interferometry (VLBI) missions. For Kerr BHs with masses and coordinates of SgrA*, M87* and M31*, illuminated by light source behind them, we consider three kinds of observation: the ground-based interferometer (similar to the Event Horizon Telescope), space-ground interferometer with a satellite in geocentric orbit and space-ground interferometer with a satellite located in Lagrange point $L_2$. The significant difference between the images produced by the ground-based telescope alone and the one of the space VLBI with an added low-orbit satellite is caused by both the increased baseline and the improved of (u,v) coverage. The near-Earth configuration of the radio interferometer for the observation of BH shadows is the most preferable for the BH shadow observations among considered cases. With further increasing the orbit radius up to the Lagrange point $L_2$ the density of the (u,v) filling decreases and the results appear less reliable. Model images for all the cases are presented.
