White Rose University Consortium logo
University of Leeds logo University of Sheffield logo York University logo

Hinode EUV spectroscopic observations of coronal oscillations

Erdelyi, R. and Taroyan, Y. (2008) Hinode EUV spectroscopic observations of coronal oscillations. Astronomy & Astrophysics, 489 (3). L49-L52. ISSN 1432-0746

Full text available as:
[img] Text
erdelyir2.pdf

Download (746Kb)

Abstract

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.

Item Type: Article
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: 04 Jun 2014 10:41
Published Version: http://dx.doi.org/10.1051/0004-6361:200810263
Status: Published
Publisher: EDP Sciences
Refereed: Yes
Identification Number: 10.1051/0004-6361:200810263
URI: http://eprints.whiterose.ac.uk/id/eprint/10527

Actions (repository staff only: login required)