Khomenko, E. and Collados, M. and Bellot Rubio, L.R. (2002) Magnetoacoustic waves in a stratified magnetic atmosphere. Il nuovo cimento C, 25 (5\6). pp. 615-621. ISSN 1826-9885
|
Text
ncc8836.pdf - Published Version Download (237kB) | Preview |
Abstract
Observed variations of magnetic field in sunspots comprise intrinsic oscillations contaminated by “false” oscillations due to time-dependent opacity effects. We present a preliminary model intended for the separation of these components. We develop a mathematical formalism based on the analytical solution of the MHD equations including gravity, inclination of the magnetic field and effects of non-adiabaticity. The theoretical results are compared with observations in the near infrared at 1.56 μm using TIP (Tenerife Infrared Polarimeter). It is shown that a part of the detected magnetic-field variations can be intrinsic magnetic-field oscillations caused by magnetoacoustic waves.
| Item Type: | Article |
|---|---|
| Additional Information: | Paper presented at the International Meeting on THEMIS and the New Frontiers of Solar Atmosphere Dynamics, Rome, Italy, March 19-21, 2001. |
| Uncontrolled Keywords: | Oscillations and waves; helioseismology ; Conference proceedings |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica > 538 Magnetismo |
| Depositing User: | Marina Spanti |
| Date Deposited: | 12 Mar 2020 15:02 |
| Last Modified: | 12 Mar 2020 15:02 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/14854 |
Actions (login required)
 |
View Item |
