Speaker
JinLin Han
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/I4.403.pdf
Observing Interstellar and Intergalactic Magnetic Fields
J. L. Han1,2
1 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
2 School of Astronomy and Space Sciences, University of the Chinese Ac ademy of Sciences,
Beijing 100049, China
email: hjl@nao.cas.cn
A variety of approaches are used to investigate interstellar and intergalactic magnetic fields
these fields. Observational results of these magnetic fields are reviewed: The large-scale mag-
netic fields in the Milky Way have been best probed by Faraday rotation measures of a large
number of pulsars and extragalactic radio sources. The coherent Galactic magnetic fields are
found to follow the spiral arms and have their direction reversals in arms and interarm regions
in the disk. The azimuthal fields in the halo reverse their directions below and above the Galac-
tic plane; The orientations of organized magnetic fields in nearby galaxies have been observed
through polarized synchrotron emission. Magnetic fields in the intracluster medium have been
indicated by diffuse radio halos, polarized radio relics, and Faraday rotations of embedded radio
galaxies and background sources. Future observational perspectives are given to reveal the 3D
tomography of the large-scale coherent magnetic fields in our Galaxy and nearby galaxies, a
better description of intracluster field properties, and firm detections of intergalactic magnetic
fields in the cosmic web.
See Han (2017) for a review and Han et al. (2018) for a most recent paper.
References
[1] J. L. Han, Annual Review of Astronomy and Astrophysics 55, 111 (2017)
[2] J. L. Han, R. N. Manchester, W. van Straten, P. Demorest, ApJS in press, (2018). arXiv: 171201997
