| ID | 116243 |
| タイトル別表記 | Helicity proxy for edge-on galaxies
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| 著者 |
Brandenburg, Axel
KTH Royal Institute of Technology and Stockholm University|Stockholm University|University of Colorado|Carnegie Mellon University
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| キーワード | dynamo –MHD– polarization – turbulence – galaxies
individual
NGC 891 – galaxies
magnetic fields
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| 資料タイプ |
学術雑誌論文
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| 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.
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| 掲載誌名 |
Monthly Notices of the Royal Astronomical Society
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| ISSN | 13652966
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| 出版者 | Oxford University Press|The Royal Astronomical Society
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| 巻 | 496
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| 号 | 4
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| 開始ページ | 4749
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| 終了ページ | 4759
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| 発行日 | 2020-06-29
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| 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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| 言語 |
eng
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| 著者版フラグ |
出版社版
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| 部局 |
教養教育院
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