dc.contributor.author | Foullon, Claire | |
dc.contributor.author | Verwichte, E. | |
dc.contributor.author | Nakariakov, V.M. | |
dc.date.accessioned | 2013-08-21T12:14:55Z | |
dc.date.issued | 2004-10-25 | |
dc.description.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. | en_GB |
dc.identifier.citation | Vol. 427 (1), pp. L5 - L8 | en_GB |
dc.identifier.doi | 10.1051/0004-6361:200400083 | |
dc.identifier.uri | http://hdl.handle.net/10871/12661 | |
dc.language.iso | en | en_GB |
dc.publisher | EDP Sciences | en_GB |
dc.subject | Sun: prominences | en_GB |
dc.subject | filaments | en_GB |
dc.subject | oscillations | en_GB |
dc.subject | UV radiation | en_GB |
dc.title | Detection of ultra-long-period oscillations in an EUV filament | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2013-08-21T12:14:55Z | |
dc.identifier.issn | 0004-6361 | |
dc.description | Copyright © 2004 ESO / EDP Sciences | en_GB |
dc.identifier.eissn | 1432-0746 | |
dc.identifier.journal | Astronomy and Astrophysics | en_GB |