Defining the middle corona

MJ West, DB Seaton, DB Wexler, JC Raymond… - Solar Physics, 2023 - Springer
The middle corona, the region roughly spanning heliocentric distances from 1.5 to 6 solar
radii, encompasses almost all of the influential physical transitions and processes that …

The Imprint of Intermittent Interchange Reconnection on the Solar Wind

PF Wyper, CR DeVore, SK Antiochos… - The Astrophysical …, 2022 - iopscience.iop.org
The solar wind is known to be highly structured in space and time. Observations from Parker
Solar Probe have revealed an abundance of so-called magnetic switchbacks within the near …

Possible evidence for shear-driven Kelvin–Helmholtz instability along the boundary of fast and slow solar wind in the corona

D Telloni, L Adhikari, GP Zank, L Zhao… - The Astrophysical …, 2022 - iopscience.iop.org
This paper reports the first possible evidence for the development of the Kelvin–Helmholtz
(KH) instability at the border of coronal holes separating the associated fast wind from the …

Recurrent solar density transients in the slow wind observed with the Metis coronagraph

R Ventura, E Antonucci, C Downs, P Romano… - Astronomy & …, 2023 - aanda.org
Aims We aim to investigate and characterize the morphology and dynamics of small-scale
coronal plasma density inhomogeneities detected as brighter, denser features propagating …

First polar observations of the fast solar wind with the Metis–Solar Orbiter coronagraph: Role of 2D turbulence energy dissipation in the wind acceleration

D Telloni, E Antonucci, L Adhikari, GP Zank… - Astronomy & …, 2023 - aanda.org
Context. The fast solar wind is known to emanate from polar coronal holes. Aims. This Letter
reports the first estimate of the expansion rate of polar coronal flows performed by the Metis …

In-flight radiometric calibration of the Metis Visible Light channel using stars and comparison with STEREO-A/COR2 data

Y De Leo, A Burtovoi, L Teriaca, M Romoli… - Astronomy & …, 2023 - aanda.org
Context. We present the results for the in-flight radiometric calibration performed for the
Visible Light (VL) channel of the Metis coronagraph on board Solar Orbiter. Aims. The …

Coronal Heating Rate in the Slow Solar Wind

D Telloni, M Romoli, M Velli, GP Zank… - The Astrophysical …, 2023 - iopscience.iop.org
This Letter reports the first observational estimate of the heating rate in the slowly expanding
solar corona. The analysis exploits the simultaneous remote and local observations of the …

Coronal mass ejection followed by a prominence eruption and a plasma blob as observed by Solar Orbiter

A Bemporad, V Andretta, R Susino, S Mancuso… - Astronomy & …, 2022 - aanda.org
Context. On 2021 February 12, two subsequent eruptions occurred above the western limb
of the Sun, as seen along the Sun-Earth line. The first event was a typical slow coronal mass …

[HTML][HTML] A prominence eruption from the Sun to the Parker Solar Probe with multi-spacecraft observations

T Niembro, DB Seaton, P Hess… - Frontiers in Astronomy …, 2023 - frontiersin.org
In the early hours of 2021 April 25, the Solar Probe Cup on board Parker Solar Probe
registered the passage of a solar wind structure characterized by a clear and constant …

The first coronal mass ejection observed in both visible-light and UV HI Ly-α channels of the Metis coronagraph on board Solar Orbiter

V Andretta, A Bemporad, Y De Leo, G Jerse… - Astronomy & …, 2021 - aanda.org
Context. The Metis coronagraph on board Solar Orbiter offers a new view of coronal mass
ejections (CMEs), observing them for the first time with simultaneous images acquired with a …