Abstract
This work is motivated by elliptical sunspot oscillation data that
cannot be explained by the standard cylinder model. We obtained a new
numerical solution of the dispersion relation for a compressible
magnetic flux tube with an elliptical cross-section embedded in a
magnetic environment. We applied the bisection method to solve this
equation and investigated the behaviour of oscillations which arise
under both photospheric and coronal conditions. From our solutions we
obtain an approximation of a circle like shape which is in perfect
agreement with a previous well known results. Our model also explains a
mode detected in an elliptical sunspot using the ROSA (Rapid
Oscillations in the Solar Atmosphere) instrument based at the Dunn Solar
Telescope.
Original language | English |
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Journal | American Geophysical Union, Fall Meeting 2019 |
Volume | 41 |
Publication status | Published - 01 Dec 2019 |
Keywords
- 7599 General or miscellaneous
- SOLAR PHYSICS
- ASTROPHYSICS
- AND ASTRONOMY
- 7899 General or miscellaneous
- SPACE PLASMA PHYSICS
- 7999 General or miscellaneous
- SPACE WEATHER