G. Del Zanna
University College London
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Publication
Featured researches published by G. Del Zanna.
Astronomy and Astrophysics | 2008
G. Del Zanna
We aim to investigate the overall characteristics of coronal active region loops and their evolution. The Hinode database was searched for observations of active regions as they crossed the Sun centre. NOAAxa010926 was selected. The morphology of this young active region did not significantly change over the course of a few days. Persistent redshifts, stronger in cooler lines (about 5–10xa0kmu2009s -1 in
Astronomy and Astrophysics | 2008
C. Chifor; Hiroaki Isobe; H. E. Mason; Iain G. Hannah; Peter R. Young; G. Del Zanna; S. Krucker; Kiyoshi Ichimoto; Y. Katsukawa; Takaaki Yokoyama
ion{Fe}{xii}
Astronomy and Astrophysics | 2008
G. Del Zanna
and 20–30xa0kmu2009s -1 in
Astronomy and Astrophysics | 2008
Durgesh Tripathi; H. E. Mason; Peter R. Young; G. Del Zanna
ion{Fe}{viii}
The Astrophysical Journal | 2009
J. T. Schmelz; Kaouther Nasraoui; L. A. Rightmire; J. A. Kimble; G. Del Zanna; Jonathan Cirtain; Edward E. DeLuca; H. E. Mason
), were observed in most loop structures with the EUV Imaging Spectrometer. Persistent blueshifts, stronger in the hotter lines (typically 5–20xa0kmu2009s -1 in
Astronomy and Astrophysics | 2008
G. Del Zanna; I. Rozum; N. R. Badnell
ion{Fe}{xii}
Astronomy and Astrophysics | 2008
Elena Dzifčáková; A. Kulinová; Cristina Chifor; H. E. Mason; G. Del Zanna; J. Sylwester; B. Sylwester
and 10–30xa0kmu2009s -1 in
The Astrophysical Journal | 2007
J. T. Schmelz; Kaouther Nasraoui; G. Del Zanna; Jonathan Cirtain; E. E. DeLuca; Helen E. Mason
ion{Fe}{xv}
Astronomy and Astrophysics | 2007
C. Chifor; G. Del Zanna; H. E. Mason; J. Sylwester; B. Sylwester; K. J. H. Phillips
), were present in areas of weak emission, in a sharp boundary between the low-lying “hot” 3xa0MK loops and the higher “cooler” 1xa0MK loops.
Astronomy and Astrophysics | 2007
M. C. Witthoeft; G. Del Zanna; N. R. Badnell
Aims. We study the physical properties of a recurring solar active region jet observed in X-rays and extreme-ultraviolet (EUV). Methods. Multi-wavelength data from all three instruments on board Hinode were analysed. X-ray imaging and spectroscopy of the microflaring emission associated with the jets was performed with the Reuven Ramaty High Energy Spectroscopic Imager ( RHESSI ). Associated EUVxa0jets were observed with the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI)/Extreme Ultraviolet Imager (EUVI) on board STEREO . Results. We found a correlation between recurring magnetic flux cancellation close to a pore, the X-ray jet emission, and associated Caxa0IIxa0H ribbon brightenings. We estimated the lower limit for the decrease in magnetic energy associated with the X-ray jet emission at 3
