The Library
Detection of ultra-long-period oscillations in an EUV filament
Tools
Tools
Tools
Foullon, C. (Claire), Verwichte, E. (Erwin) and Nakariakov, V. M. (Valery M.) (2004) Detection of ultra-long-period oscillations in an EUV filament. Astronomy & Astrophysics, Vol.427 (No.1). L5-L8. doi:10.1051/0004-6361:200400083 ISSN 0004-6361.
![[img]](https://wrap.warwick.ac.uk/style/images/fileicons/application_pdf.png)
|
PDF
WRAP_Foullon_detection_ultra-long_.pdf - Requires a PDF viewer. Download (550Kb) |
Official URL: http://dx.doi.org/10.1051/0004-6361:200400083
Abstract
We report the first detection of long-period (8-27 h) oscillatory intensity variations in a coronal filament. The filament is observed continuously as it crosses the solar disk in a 12-min-cadence SoHO/EIT 195 Å uninterrupted data set. Cyclic intensity variations are found to be correlated along the filament, while the most pronounced oscillations are detected at its southern end for nearly 6 days. The dominant period of these oscillations is 12.1 h and the amplitude of the intensity variations reaches approximately 10% of the background intensity. The ultra-long-period oscillations may be interpreted in terms of slow string MHD modes or may be connected with thermal over-stability associated with peculiarities of the cooling/heating function and with the effect of neutrals. These theoretical predictions however do not explain the spatial structure of the oscillations along the filament.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Solar oscillations, Sun -- Corona, Sun -- Filaments | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | EDP Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | November 2004 | ||||
| Dates: |
|
||||
| Volume: | Vol.427 | ||||
| Number: | No.1 | ||||
| Page Range: | L5-L8 | ||||
| DOI: | 10.1051/0004-6361:200400083 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Funder: | European Space Agency (ESA), United States. National Aeronautics and Space Administration (NASA) |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
