dc.contributor.author |
Popescu, M. D |
|
dc.contributor.author |
Banerjee, D |
|
dc.contributor.author |
O`Shea, E |
|
dc.contributor.author |
Doyle, J. G |
|
dc.contributor.author |
Xia, L. D |
|
dc.date.accessioned |
2006-01-23T04:11:19Z |
|
dc.date.available |
2006-01-23T04:11:19Z |
|
dc.date.issued |
2005-11 |
|
dc.identifier.citation |
Astronomy and Astrophysics, Vol. 442, No. 3, pp. 1087 - 1090 |
en |
dc.identifier.uri |
http://hdl.handle.net/2248/686 |
|
dc.description.abstract |
Using time series data of spectral lines originating from a wide range of temperatures in the solar
transition region, above a polar coronal hole, from SUMER (Solar Ultraviolet Measurements of Emitted Radiation)
on SoHO (Solar and Heliospheric Observatory), we report on the detection of very long (≈170 min) periodic
intensity fluctuations, above the limb. Our data also reveal long periodicities (10-90 min), previously observed
with other SoHO instruments. With the acoustic cut-off frequency implying a maximum allowable period of ≈
90 min, it is unclear whether these intensity fluctuations are due to waves or are the result of a recurrent magnetic
reconnection process. |
en |
dc.format.extent |
1043416 bytes |
|
dc.format.mimetype |
application/pdf |
|
dc.language.iso |
en |
en |
dc.publisher |
EDP Science |
|
dc.relation.uri |
http://dx.doi.org/10.1051/0004-6361:20053714 |
|
dc.rights.uri |
© ESO |
|
dc.subject |
Sun: solar wind |
en |
dc.subject |
Sun: transition region |
en |
dc.subject |
Sun: corona |
en |
dc.title |
Very long period activity at the base of solar wind streams |
en |
dc.type |
Article |
en |