RM Synthesis of 33 sources around M31

Low-frequency radio continuum observations are best suited to search for radio halos of inclined galaxies. Polarization measurements at low frequencies allow the detection of...低频射电连续谱观测最适于搜寻倾斜星系的射电晕（radio halos）。在低频段开展偏振测量，则可实现……的探测。