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Propagating EUV disturbances in the solar corona : two-wavelength observations
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King, D. B. (Damian Bryan), Nakariakov, Valery M., Deluca, E. E., Golub, L. (Leon) and McClements, K. G.. (2003) Propagating EUV disturbances in the solar corona : two-wavelength observations. Astronomy & Astrophysics, Vol.404 (No.1). L1-L4. ISSN 0004-6361
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Official URL: http://dx.doi.org/10.1051/0004-6361:20030763
Abstract
Quasi-periodic EUV disturbances simultaneously observed in 171 Å and 195 Å TRACE bandpasses propagating outwardly in a fan-like magnetic structure of a coronal active region are analysed. Time series of disturbances observed in the different bandpasses have a relatively high correlation coefficient (up to about 0.7). The correlation has a tendency to decrease with distance along the structure: this is consistent with an interpretation of the disturbances in terms of parallel-propagating slow magnetoacoustic waves. The wavelet analysis does not show a significant difference between waves observed in different bandpasses. Periodic patterns of two distinct periods: 2-3 min and 5-8 min are detected in both bandpasses, existing simultaneously and at the same distance along the loop, suggesting the nonlinear generation of the second harmonics.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Faculty of Science > Physics |
| Library of Congress Subject Headings (LCSH): | Sun -- Corona, Magnetohydrodynamic waves, Solar oscillations, Sun -- Loop prominences |
| Journal or Publication Title: | Astronomy & Astrophysics |
| Publisher: | EDP Sciences |
| ISSN: | 0004-6361 |
| Date: | June 2003 |
| Volume: | Vol.404 |
| Number: | No.1 |
| Page Range: | L1-L4 |
| Identification Number: | 10.1051/0004-6361:20030763 |
| Status: | Peer Reviewed |
| Access rights to Published version: | Open Access |
| Funder: | Particle Physics and Astronomy Research Council (Great Britain) (PPARC), Great Britain. Dept. of Trade and Industry (DTI) |
| References: | Berghmans, D., & Clette, F. 1999, Sol. Phys., 186, 207 Berghmans, D., McKenzie, D., & Clette, F. 2001, A&A, 369, 291 DeForest, C. E., & Gurman, J. B. 1998, ApJ, 501, L217 De Moortel, I., Ireland, J., Walsh, R. W., & Hood, A. W. 2002a, Sol. Phys., 209, 61 De Moortel, I., Hood, A. W., Ireland, J., & Walsh, R. W. 2002b, Sol. Phys., 209, 89 De Moortel, I., Ireland, J., Hood, A. W., & Walsh, R. W. 2002, A&A, 387, L13 De Moortel, I., Ireland, J., & Walsh, R. W. 2000, A&A, 355, L23 Han, W. E., Thyagaraja, A., Fielding, S. J., & Valoviˇc, M. 2000, Plasma Phys. Control. Fusion, 42, 181 Ireland, J., & De Moortel, I. 2002, A&A, 391, 339 Kendall, M. G., Stuart, A. 1961, The Advanced Theory of Statistics (London: Griffin) Nakariakov, V. M., King, D. B., & Tsiklauri, D. 2002, ESA SP-506, 705 Nakariakov, V. M., Verwichte, E., Berghmans, D., & Robbrecht, E. 2000, A&A, 362, 1151 Nightingale, R. W., Aschwanden, M. J., & Hurlburt, N. E. 1999, Sol. Phys., 190, 249 Ofman, L., Romolli, M., Poletto, G., Noci, G., & Kohl, J. L. 2000, ApJ, 529, 592 Robbrecht, E., Verwichte, E., Berghmans, D., et al. 2001, A&A, 370, 591 Sakurai, T., Ichimoto, K., Raju, K. P., & Singh, J. 2002, Sol. Phys., 209, 265 Tsiklauri, D., & Nakariakov, V. M. 2001, A&A, 379, 1106 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/3804 |
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