G. Del Zanna

Flows in active region loops observed by Hinode EIS

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

Magnetic flux cancellation associated with a recurring solar jet observed with Hinode, RHESSI, and STEREO/EUVI

ion{Fe}{xii}

Flare lines in Hinode EIS spectra

and 20–30xa0kmu2009s -1 in

Density structure of an active region and associated moss using Hinode/EIS

ion{Fe}{viii}

ARE CORONAL LOOPS ISOTHERMAL OR MULTITHERMAL

), were observed in most loop structures with the EUV Imaging Spectrometer. Persistent blueshifts, stronger in the hotter lines (typically 5–20xa0kmu2009s -1 in

Electron-impact excitation of Be-like Mg

ion{Fe}{xii}

Nonthermal and thermal diagnostics of a solar flare observed with RESIK and RHESSI

and 10–30xa0kmu2009s -1 in

Coronal diagnostic spectrometer observations of isothermal and multithermal coronal loops

ion{Fe}{xv}

A benchmark study for CHIANTI based on RESIK solar flare spectra

), were present in areas of weak emission, in a sharp boundary between the low-lying “hot” 3xa0MK loops and the higher “cooler” 1xa0MK loops.

Atomic data from the IRON project LXIII: Electron-impact excitation of Fe19+ up to n=4

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