CDS wide slit time-series of EUV coronal bright points

I. Ugarte-Urra, J. G. Doyle, V. M. Nakariakov, C. R. Foley
2004 Astronomy and Astrophysics  
Wide slit (90 × 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  584.34 Å, O  629.73 Å and Mg / 368 Å time-series confirms the oscillating nature of the BPs, with periods ranging between 600 and 1100 seconds. In one case we detect periods as short as 236 seconds. We suggest that these oscillations are the
more » ... me 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.
doi:10.1051/0004-6361:20041069 fatcat:4evpoali2rfvtgdlivftjeya5m