AGN in IFRS. VLBA observations

Infrared-faint radio sources (IFRS) form a new class of galaxies characterised by radio flux densities between tenths and tens of mJy and faint or absent infrared counterparts....红外暗射电源（Infrared-faint radio sources, IFRS）是一类全新的星系类别，其特征为射电流量密度处于0.1至数十毫央斯基（mJy）之间，且红外对应体微弱或缺如。