| dc.contributor.author | GALLAGHER, PETER THOMAS | |
| dc.date.accessioned | 2010-01-15T16:42:51Z | |
| dc.date.available | 2010-01-15T16:42:51Z | |
| dc.date.issued | 2003 | |
| dc.date.submitted | 2003 | en |
| dc.identifier.citation | Katsiyannis, A.C., Williams, D.R., McAteer, R.T.J., Gallagher, P.T., Keenan, F.P., Murtagh, F. `Eclipse observations of high-frequency oscillations in active region coronal loops? in Astronomy and Astrophysics, 406, (2), 2003, pp 709-714 | en |
| dc.identifier.other | Y | |
| dc.description | PUBLISHED | en |
| dc.description.abstract | One of the mechanisms proposed for heating the corona above solar active regions is the damping of magnetohydrodynamic
(MHD) waves. Continuing on previous work, we provide observational evidence for the existence of high-frequency
MHD waves in coronal loops observed during the August 1999 total solar eclipse. A wavelet analysis is used to identify twenty
4?4 arcsec2 areas showing intensity oscillations. All detections lie in the frequency range 0.15?0.25 Hz (7?4 s), last for at least
3 periods at a confidence level of more than 99% and arise just outside known coronal loops. This leads us to suggest that they
occur in low emission-measure or different temperature loops associated with the active region. | en |
| dc.description.sponsorship | The authors would like to thank K. J. H. Phillips
for his collaboration on the SECIS project. ACK acknowledges funding
by the Leverhume Trust via grant F00203/A. DRW acknowledges
a CAST studentship funded by the Department of Employment &
Learning and the Rutherford Appleton Laboratory. JMCA acknowledges
CAST studentship funded by DEL and QUB. ACK & DRW
would like to thank Valery Nakariakov and Temury Zaqarashvili for
useful discussions | en |
| dc.format.extent | 709-714 | en |
| dc.format.extent | 1286423 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en | en |
| dc.publisher | EDP Sciences | en |
| dc.relation.ispartofseries | Astronomy and Astrophysics | en |
| dc.relation.ispartofseries | 406 | en |
| dc.relation.ispartofseries | 2 | en |
| dc.rights | Y | en |
| dc.subject | MHD | en |
| dc.subject | eclipses | en |
| dc.subject | sun activity | en |
| dc.subject | astrophysics | en |
| dc.title | Eclipse observations of high-frequency oscillations in active region coronal loops | en |
| dc.type | Journal Article | en |
| dc.type.supercollection | scholarly_publications | en |
| dc.type.supercollection | refereed_publications | en |
| dc.identifier.peoplefinderurl | http://people.tcd.ie/gallagpt | |
| dc.identifier.rssinternalid | 53343 | |
| dc.identifier.rssuri | http://dx.doi.org/10.1051/0004-6361:20030458 | |
| dc.identifier.uri | http://hdl.handle.net/2262/35688 | |
