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CDS wide slit time-series of EUV coronal bright points \ud

By I. Ugarte-Urra, J. G. (John Gerard) Doyle, V. M. (Valery M.) Nakariakov and C. R. (Carl R.) Foley

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

Topics: QB
Publisher: EDP Sciences
Year: 2004
OAI identifier: oai:wrap.warwick.ac.uk:3800

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Citations

  1. (2003). Korean Astron. Soc., 35, 59I. Ugarte-Urra et al.: CDS wide slit time-series of EUV coronal bright points 1095

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