Magnetic Fields in Irregular Galaxies

Krzysztof T. Chyży
2002 Highlights of Astronomy  
AbstractRadio data of large irregular galaxies reveal some extended synchrotron emission with a substantial degree of polarization. In the case of NGC 4449 strong galaxy-scale regular magnetic fields were found, in spite of the lack of ordered rotation required for the conventional dynamo action. The rigidly rotating large irregular NGC 55 shows vertical polarized spurs connected with a network of ionized gas filaments. Small dwarf irregulars show only isolated polarized spots.
doi:10.1017/s1539299600014775 fatcat:2ruppj7wufgalgbs6c5uad7yay