Gyenge, N. and Erdélyi, R. (Submitted: 2018) Global Oscillation Pattern in Succeeding Solar Flares. arXiv. (Submitted)
Abstract
The temporal recurrence of micro-flare events is studied in a time interval before and after of major solar flares. Our sample is based on the x-ray flare observations by the Geostationary Operational Environmental Satellite (GOES) and Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI). The analysed data contains 1330/301 M- and X-class GOES/RHESSI energetic solar flares and 4062/4119 GOES/RHESSI micro-flares covering the period elapsed since 2002. The temporal analysis of recurrence, by Fast Fourier Transform (FFT), of the micro-flares shows multiple significant periods. Based on the GOES and RHESSI data, the temporal analysis also demonstrates that multiple periods manifest simultaneously in both statistical samples without any significant shift over time. In the GOES sample, the detected significant periods are: 11.33, 5.61, 3.75, 2.80 and 2.24 minutes. The RHESSI data shows similar significant periods at 8.54, 5.28, 3.66, 2.88 and 2.19 minutes. The periods are interpreted as signatures of standing oscillations, with the longest period (P1) being the fundamental and others as higher harmonic modes. The period ratio of the fundamental and higher harmonics (P1/PN) is also analysed. The standing modes may be signatures of global oscillations of the entire solar atmosphere encompassing magnetised plasma from photosphere to corona in active regions.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2018 The Author(s). For reuse permissions, please contact the Author(s). |
Keywords: | astro-ph.SR; astro-ph.SR |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/M000826/1 THE ROYAL SOCIETY IE141493 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 16 May 2018 15:34 |
Last Modified: | 16 May 2018 15:34 |
Published Version: | https://arxiv.org/abs/1804.11229 |
Status: | Submitted |
Refereed: | Yes |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:130724 |