Very long period activity at the base of solar wind streams

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