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CDS wide slit time-series of EUV coronal bright points

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Ugarte-Urra, I., Doyle, J. G. (John Gerard), Nakariakov, Valery M. and Foley, C. R. (Carl R.). (2004) CDS wide slit time-series of EUV coronal bright points. Astronomy & Astrophysics, Vol.425 (No.3). pp. 1083-1095. ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361:20041069

Abstract

Wide slit (90" x 240" ) movies of four Extreme Ultraviolet coronal bright points (BPs) obtained with the Coronal Diagnostic Spectrometer (CDS) on board the Solar and Heliospheric Observatory (SoHO) have been inspected. The wavelet analysis of the He I 584.34 Å, O V 629.73 Å and Mg VII/IX 368 Å time-series confirms the oscillating nature of the BPs, with periods ranging between 600 and 1100 s. In one case we detect periods as short as 236 s. We suggest that these oscillations are the same as those seen in the chromospheric network and that a fraction of the network bright points are most likely the cool footpoints of the loops comprising coronal bright points. These oscillations are interpreted in terms of global acoustic modes of the closed magnetic structures associated with BPs.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Sun -- Corona, Solar oscillations, Solar chromosphere
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Date:	October 2004
Volume:	Vol.425
Number:	No.3
Page Range:	pp. 1083-1095
Identification Number:	10.1051/0004-6361:20041069
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	Northern Ireland. Dept. of Culture, Arts & Leisure, Particle Physics and Astronomy Research Council (Great Britain) (PPARC), European Space Agency (ESA), United States. National Aeronautics and Space Administration (NASA)
Grant number:	PPA/V/S/1999/00668 (PPARC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/3800