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Magnetic fields in the solar vicinity and in the Galactic halo

文献类型：期刊论文

作者Xu, J.1,2; Han, J. L.1,2,3
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2019-07-01
卷号486期号:3页码:4275-4289
ISSN号0035-8711
关键词pulsars: general ISM: magnetic fields Galaxy: structure galaxies: magnetic fields
DOI10.1093/mnras/stz1060
英文摘要We characterize local large-scale regular magnetic fields as well as small-scale magnetic features in the solar vicinity by using the rotation measures of 494 pulsars within 3 kpc from the Sun. The local magnetic field in the Galactic disc is found to follow local spiral arms and to have a field strength of 1.6 mu G, with a reversal at 140 pc inside the solar circle in the direction of the Galactic Centre. A field reversal in the first quadrant towards the Sagittarius arm is identified at about 1 kpc from the Sun. In the local Galactic halo, the toroidal fields have a field strength of more than 1.6 mu G. Local small-scale magnetic bubbles are investigated by using nearby pulsars in and behind these structures. The Local Bubble might have a line-of-sight magnetic field strength of 0.5-2 mu G mainly towards l similar to 90 degrees; the upper shell of the Gum Nebula shows a possible amplification of the magnetic field with a factor of 2 probably by compression; the North Polar Spur does not contribute significant Faraday rotation, and perhaps its magnetic field is nearly perpendicular to the line of sight. An anomalous region in the fourth quadrant is found to have a field of 1.4 mu G over a scale of 1 kpc, which implies a sub-Galactic structure with ordered fields opposite in direction to the large-scale disc field. We develop a model for the magnetic field in the Galactic halo based on the rotation measures of pulsars and averaged rotation measures of background radio sources.
WOS关键词PULSAR ROTATION MEASURES ; NORTH POLAR SPUR ; OBSERVATIONAL CONSTRAINTS ; LOCAL BUBBLE ; INTERSTELLAR ; GALAXY ; DISK ; STRENGTH ; HI
资助项目National Natural Science Foundation of China[11503038] ; National Natural Science Foundation of China[11833009] ; Key Research Program of the Chinese Academy of Sciences[QYZDJ-SSW-SLH021] ; strategic Priority Research Program of Chinese Academy of Sciences[XDB23010200] ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000474903500099
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; strategic Priority Research Program of Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences
源URL[http://ir.bao.ac.cn/handle/114a11/26969]  
专题中国科学院国家天文台
通讯作者Xu, J.; Han, J. L.
作者单位1.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100101, Peoples R China
2.Chinese Acad Sci, NAOC, CAS Key Lab FAST, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Xu, J.,Han, J. L.. Magnetic fields in the solar vicinity and in the Galactic halo[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,486(3):4275-4289.
APA Xu, J.,&Han, J. L..(2019).Magnetic fields in the solar vicinity and in the Galactic halo.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,486(3),4275-4289.
MLA Xu, J.,et al."Magnetic fields in the solar vicinity and in the Galactic halo".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 486.3(2019):4275-4289.

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