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ID 116243
タイトル別表記
Helicity proxy for edge-on galaxies
著者
Brandenburg, Axel KTH Royal Institute of Technology and Stockholm University|Stockholm University|University of Colorado|Carnegie Mellon University
キーワード
dynamo –MHD– polarization – turbulence – galaxies
individual
NGC 891 – galaxies
magnetic fields
資料タイプ
学術雑誌論文
抄録
We study the prospects of detecting magnetic helicity in galaxies by observing the dust polarization of the edge-on galaxy NGC 891. Our numerical results of mean-field dynamo calculations show that there should be a large-scale component of the rotationally invariant parity-odd B polarization that we predict to be negative in the first and third quadrants, and positive in the second and fourth quadrants. The large-scale parity-even E polarization is predicted to be negative near the axis and positive further away in the outskirts. These properties are shown to be mostly a consequence of the magnetic field being azimuthal and the polarized intensity being maximum at the centre of the galaxy and are not a signature of magnetic helicity.
掲載誌名
Monthly Notices of the Royal Astronomical Society
ISSN
13652966
出版者
Oxford University Press|The Royal Astronomical Society
496
4
開始ページ
4749
終了ページ
4759
発行日
2020-06-29
権利情報
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
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出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
教養教育院