Erdelyi, R. and Taroyan, Y. (2008) Hinode EUV spectroscopic observations of coronal oscillations. Astronomy & Astrophysics, 489 (3). L49-L52. ISSN 1432-0746
Context. Waves offer a unique opportunity to understand and diagnose the properties of the solar coronal plasma. Aims. Hinode/EIS observations are analysed to detect wave and oscillatory motions in the solar corona. Methods. The EIS observations were carried out using a selection of EUV lines. Hinode/XRT images are taken concurrently. Results. Two examples of oscillations in active regions are presented. We analysed the evolution of the intensities and Doppler shifts. The Hinode/XRT images suggest that both events occurred along loop-like structures. The first event is interpreted as a slow sausage (acoustic) type wave with a period of 1.2 mHz. The second example is associated with a transverse, most likely kink type, wave with a period of 3 mHz. The EUV line ratios were then used to determine the value of the coronal magnetic field.
|Copyright, Publisher and Additional Information:||© 2008 EDP Sciences. Reproduced in accordance with the publisher's self-archiving policy.|
|Institution:||The University of Sheffield|
|Academic Units:||The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)|
|Depositing User:||Mrs Megan Hobbs|
|Date Deposited:||16 Mar 2010 18:56|
|Last Modified:||17 Nov 2015 16:17|