The Library

Damping of vertical coronal loop kink oscillations through wave tunneling

Tools

Brady, Christopher S. and Arber, T. D.. (2005) Damping of vertical coronal loop kink oscillations through wave tunneling. Astronomy & Astrophysics, Vol.438 (No.2). pp. 733-740. ISSN 0004-6361

PDF
WRAP_Brady_100_Damping_vertical.pdf - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (1747Kb)

Official URL: http://dx.doi.org/10.1051/0004-6361:20042527

Abstract

The decay rate of vertical kink waves in a curved flux tube is modeled numerically. The full MHD equations are solved for a curved equilibrium flux tube in an arcade geometry and the decay of ψ, the integral over the flux tube of the modulus of the velocity perpendicular to the local magnetic field, is measured. These simulations are 2D and are thus restricted to kink oscillations in the loop plane. The decay rate is found to increase with increasing wavelength, increasing β and decreasing density contrast ratio. The wave tunneling eﬀect is shown to be a possible mechanism for the high decay rate of the recent observed kink oscillation reported by Wang & Solanki (2004).

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Sun -- Corona, Solar magnetic fields, Solar oscillations, Sun -- Loop prominences
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Date:	August 2005
Volume:	Vol.438
Number:	No.2
Page Range:	pp. 733-740
Identification Number:	10.1051/0004-6361:20042527
Status:	Peer Reviewed
Access rights to Published version:	Open Access
References:	Arber, T. D., Longbottom, A.W., Gerrard, C. L.,&Milne, A. M. 2001, JCP, 170, 151 Aschwanden, M. J., Fletcher, L., Schrijver, C. J., & Alexander, D. 1999, ApJ, 620, 880 Aschwanden, M. J., DePontieu, B., Schrijver, C. J., & Title, A. M. 2002, Sol. Phys., 206, 99 Berghmans, D., & Clette, F. 1999, Sol. Phys., 186, 207 Cally, P. S. 1986, Sol. Phys., 103, 227 DeForest, C. E., & Gurman, J. B. 1998, ApJ., 501, L217 Nakariakov, V. M., Ofman, L., DeLuca, E. E., Roberts, B., & Davila, J. M. 1999, Science, 285, 862 Nakariakov, V. M., & Ofman, L. 2001, A&A, 372, L53 Nakariakov, V. M., & Roberts, B. 1995, SoPh., 159, 399 Nightingale, R. W., Aschwanden, M. J., & Hurlburt, N. E. 1999, Sol. Phys., 190, 249 Ofman, L., & Aschwanden, M. J. 2002, ApJ, 576, 2, L153 Roberts, B., Edwin, P. M., & Benz, A. O. 1983, Nature, 305, 688 Roberts, B., Edwin, P. M., & Benz, A. O. 1984, ApJ, 279, 857 Roberts, B. 2000, Sol. Phys., 193, 139 Ruderman, M. S., & Roberts, B. 2002, ApJ, 577, 475 Schrijver, C. J., Aschwanden, M. J., & Title, A. M. 2002, Sol. Phys., 206, 69 Smith, J. M., Roberts, B., & Oliver, R. 1997, A&A, 317, 752 Wang, T. J., & Solanki, S. K. 2004, A&A, 421, L33
URI:	http://wrap.warwick.ac.uk/id/eprint/3590