Pulsars as probes for the Galactic magnetic fields
There are several kinds of probes for the Galactic magnetic fields. Among them, pulsars are the best. In the Galactic disk, from the rotation measures (RMs) of a large number of newly discovered pulsars, the large-scale magnetic fields along the spiral arms have been delineated in a much larger region than ever before, with alternating directions in the arm and interarm regions. The RM data of extragalactic radio sources are consistent with such magnetic field directions in the tangential regions. The strength of large-scale fields obtained from pulsar RM data has been found to increase exponentially towards the Galactic center. Since pulsar RMs are an integration of electron density and magnetic fields along the lines of sight from pulsars to us, which contain the information of magnetic field fluctuation on different scales for pulsars with different distances. We derived the spatial magnetic field energy spectrum from pulsar RM data, which shows a shallow broken spectrum compared to the steep Kolmogorov spectrum of magnetic energy at small scales.
magnetic fields Galaxy Interstellar medium pulsars rotation measures
JinLin Han
National Astronomical Observatories, Chinese Academy of Sciences, Jia-20, DaTun Road, Chao Yang District, Beijing 100012, China
国际会议
紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)
安徽黄山
英文
165-172
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）