1.3mm VLBI observations of Sagittarius A*

Sagittarius A, the ~4x10^6^M_{sun}_ black hole candidate at the Galactic center, can be studied on Schwarzschild radius scales with (sub)millimeter wavelength very long baseline...人马座A（Sagittarius A）是位于银河系中心、质量约为4×10^6倍太阳质量的黑洞候选体，可借助（亚）毫米波波段甚长基线干涉测量技术在史瓦西半径（Schwarzschild radius）尺度下开展相关研究。