Jain, R. orcid.org/0000-0002-0080-5445, Gascoyne, A. and Hindman, B.W. (2011) Interaction of p modes with a collection of thin magnetic tubes. Monthly Notices of the Royal Astronomical Society, 415 (2). pp. 1276-1279. ISSN 0035-8711
Abstract
We investigate the net effect of a multitude of thin magnetic tubes on the energy of ambient acoustic p modes. A p mode, when incident on a thin magnetic flux tube, excites magnetohydrodynamic (MHD) tube waves. These tube waves propagate vertically along the flux tube carrying away energy from the p-mode cavity resulting in the absorption of incident p-mode energy. We calculate the absorption arising from the excitation of sausage MHD waves within a collection of many non-interacting magnetic flux tubes with differing plasma properties. We find that the shape and magnitude of the absorption, when compared with the observationally measured absorption, favours a model with a maximum-flux boundary condition applied at the photosphere and a narrow distribution of plasma β in an ensemble with mean β value between 0.5 and 1.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2011 University of Sheffield © 2011 RAS Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Keywords: | MHD; Scattering; Sun: helioseismology; Sun: oscillations; FLUX TUBES; ABSORPTION; SUNSPOTS; OSCILLATIONS; REGION; FIELDS; PLAGE |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 06 Nov 2017 09:31 |
Last Modified: | 06 Nov 2017 09:31 |
Published Version: | https://doi.org/10.1111/j.1365-2966.2011.18778.x |
Status: | Published |
Publisher: | Oxford University Press |
Refereed: | Yes |
Identification Number: | 10.1111/j.1365-2966.2011.18778.x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:123515 |