Remember Me
Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:

OpenAIRE is about to release its new face with lots of new content and services.
During September, you may notice downtime in services, while some functionalities (e.g. user registration, login, validation, claiming) will be temporarily disabled.
We apologize for the inconvenience, please stay tuned!
For further information please contact helpdesk[at]openaire.eu

fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Carter, B.; Erdelyi, R. (2008)
Publisher: EDP Sciences
Languages: English
Types: Article
Aims.We study kink waves in a magnetic flux tube modelled as a straight core surrounded by a magnetically twisted annulus, both embedded in a straight ambient external field, and derive the dispersion relation for this configuration.\ud Methods.The existence and behaviour of the kink modes are examined with specific attention to the effect that the addition of magnetic twist has on phase speeds and periods. Analytic expansions to the short and long wavelength approximations are also considered.\ud Results.The magnetic twist is found to introduce of an infinite set of body modes into solutions of the dispersion relation not present in the untwisted case. Moreover, for the kink modes, the width of interval of this infinite set, generally found to occupy phase speeds around the annulus' longitudinal Alfvén speed, increases for longer wavelengths. Two surface modes are also present in the solution, one at each surface: the internal and the external edges of the annulus. The magnetic twist is found to increase or decrease the phase speeds of these surface modes that are depending on the ratio of internal and external Alfvén speeds in the flux tube.\ud Conclusions.The magnetic twist of the annulus region of a flux tube is found to have a marked effect on the phase speeds of occurring modes. A straight annulus layer increased (or decreased) the periods of the surface modes for a tube modelled as a density (magnetic) enhancement. The addition of twist reduces the periods of the modes in both cases.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Ashwanden, M. J. 2004, Physics of the Solar Corona (Chichester, UK: Praxis Publishing Ltd.)
    • Banerjee, D., Erdélyi, R., O'Shea, E., & Oliver, R. 2007, Sol. Phys., 246, 3
    • Bennett, K., Roberts, B., & Narain, U. 1999, Sol. Phys., 185, 41
    • Carter, B. K., & Erdélyi, R. 2004, in Coronal Heating, ESA SP-575, ed. R. W. Walsh, et al., 378
    • Carter, B. K., & Erdélyi, R. 2007, A&A, 475, 323
    • Dungey, J. W., & Loughhead, R. E. 1954, Austr. J. Phys., 7, 5
    • Edwin, P. M., & Roberts, B. 1983, Sol. Phys., 88, 179
    • Erdélyi, R. 2006, Phil. Trans. Royal Soc. A, 364, 351
    • Erdélyi, R., & Carter, B. K. 2006, A&A, 455, 361
    • Erdélyi, R., & Fedun, V. 2006, Sol. Phys., 238, 41
    • Erdélyi, R., & Fedun, V., 2007, Sol. Phys., 246, 101
    • Kukhianidze, V., Zaqarashvili, T. V., & Khutsishvili, E. 2006, A&A, 449, 35
    • Mikhalyaev, B. B., & Solov'ev, A. A. 2004, Astron. Lett., 30, 268
    • Mikhalyaev, B. B., & Solov'ev, A. A. 2005, Sol. Phys., 227, 249
    • Nakariakov, V. M., & Verwichte, E. 2005, LRSP, 2, 3
    • Roberts, P. H. 1956, ApJ, 124, 430
    • Spruit, H. C. 1982, Sol. Phys., 75, 3
    • Zaqarashvili, T. V., Khutsishvili, E., Kukhianidze, V., & Ramishvili, G. 2007, A&A, 474, 627
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article

Cookies make it easier for us to provide you with our services. With the usage of our services you permit us to use cookies.
More information Ok