Magnetic field and Faraday rotation from large-scale interstellar medium to plasma near the black-hole horizon

作     者：Qingwen WU 吴庆文

作者机构：Department of AstronomySchool of PhysicsHuazhong University of Science and Technology and CollegeWuhan 430074People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2022年第24卷第12期

页      面：158-164页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the support of the National SKA Program of China(No.2022SKA0120101) National Natural Science Foundation of China(Nos.U1931203 and 12233007) 

主　　题：magnetic field polarization interstellar medium jet magnetohydrodynamics 

摘      要：Magnetic fields appear to be ubiquitous in the astrophysical environments of our Universe,but are still poorly understood despite playing an important role in understanding different-scale celestial objects(e.g.,Earth,planets,stars,normal galaxies,active galactic nuclei,clusters etc.).We briefly review the results and progress in magnetic field estimation based on rotation measures from the large-scale interstellar medium,megaparsec-scale radio jets to the plasma near the black-hole *** find that there is no evident correlation between electron density and magnetic field in warm ionized plasma,which suggests that the estimation of the magnetic field from the ratio of the rotation measure and dispersion measure correctly reflects the intrinsic *** estimation of the magnetic field from the rotation measure is also discussed near the black hole horizon in M *** Square Kilometre Array will greatly improve the understanding of the magnetic field in our Universe,which will provide high-quality polarization imaging and extragalactic rotation measures in the near future.