Muglach, K. (2002) Dynamics of active regions observed with TRACE. Il nuovo cimento C, 25 (5\6). pp. 647-652. ISSN 1826-9885
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Abstract
I present results of an international joint observing campaign, which was carried out in September 2000, to study the oscillatory behaviour of active regions. In this contribution I will concentrate on oscillations in the higher layers of the solar photosphere as observed with the UV filters of the Transition Region and Coronal Explorer (TRACE). I study the distribution of oscillatory power in an extended active region. I can find a number of well-known chromospheric dynamic phenomina like running penumbral waves, enhanced 5 min power in the plage and network regions and strong 3 min power in the internetwork. In addition, I find that the 3 min power in the surroundings of the active region is decreased, an effect that has not been observed before. From the topology of the magnetic field I infer that this can be explained by an interaction of the acoustic wave field with the expanding magnetic field of the active region.
| Item Type: | Article |
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| Additional Information: | Paper presented at the International Meeting on THEMIS and the New Frontiers of Solar Atmosphere Dynamics, Rome, Italy, March 19-21, 2001. JOP097, see http://sohowww.nascom.nasa.gov/soc/JOPs/jop097.txt |
| Uncontrolled Keywords: | Time series analysis;time variability ; Oscillations and waves;helioseismology ; Chromosphere and chromosphere-corona transition;spicules ; Sunspots, faculae, plages ; Conference proceedings |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 12 Mar 2020 16:53 |
| Last Modified: | 12 Mar 2020 16:53 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/14858 |
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