galaxies : magnetic fields;
polarization;
pulsars : general;
turbulence;
D O I:
10.1086/317852
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We present a physical interpretation for the generation of circular polarization resulting from the propagation of radiation through a magnetized plasma in terms of a rotation measure gradient, or "Faraday wedges." Criteria for the observability of scintillation-induced circular polarization are identified. Application of the theory to the circular polarization in pulsars and compact extragalactic sources is discussed.