92 citations · 135 across the 5 of their papers we have counts for
6 papers
First Solar Orbiter observation of a dark halo in the solar atmosphere
Serena Maria Lezzi, David M. Long, Vincenzo Andretta +5
Solar active regions (ARs) are often surrounded by dark large areas of reduced emission compared to the quiet Sun, observed at various wavelengths corresponding to chromosphere, tr…
Dark Halos around Solar Active Regions. I. Emission properties of the Dark Halo around NOAA 12706
Serena Maria Lezzi, Vincenzo Andretta, Mariarita Murabito +1
Dark areas around active regions (ARs) have been first observed in chromospheric lines more than a century ago and are now associated to the Hα fibril vortex around ARs. Nowadays,…
High resolution soft X-ray spectroscopy and the quest for the hot (5-10 MK) plasma in solar active regions
G. Del Zanna, V. Andretta, P. J. Cargill +5
We discuss the diagnostics available to study the 5-10 MK plasma in the solar corona, which is key to understanding the heating in the cores of solar active regions. We present sev…
The EUV spectrum of the Sun: SOHO CDS NIS radiances during solar cycle 23
V. Andretta, G. Del Zanna
For the first time, we present and discuss EUV radiances of the solar transition region (TR) and corona obtained during a solar cycle. The measurements were obtained with the SOHO/…
On-Orbit Degradation of Solar Instruments
A. BenMoussa, S. Gissot, U. Schühle +38
We present the lessons learned about the degradation observed in several space solar missions, based on contributions at the Workshop about On-Orbit Degradation of Solar and Space…
Coronal Diagnostics from Narrowband Images around 30.4 nm
V. Andretta, D. Telloni, G. Del Zanna
Images taken in the band centered at 30.4 nm are routinely used to map the radiance of the He II Ly alpha line on the solar disk. That line is one of the strongest, if not the stro…