Publications (31)
In-flight validation of Metis Visible-light Polarimeter Coronagraph on board Solar Orbiter
A. Liberatore, S. Fineschi, M. Casti +21
Context. The Metis coronagraph is one of the remote-sensing instruments of the ESA/NASA Solar Orbiter mission. Metis is aimed at the study of the solar atmosphere and solar wind by…
Detection of small magnetic flux ropes from the third and fourth Parker Solar Probe encounters
L. -L. Zhao, G. P. Zank, Q. Hu +22
We systematically search for magnetic flux rope structures in the solar wind to within the closest distance to the Sun of 0.13 AU, using data from the third and fourth orbits of th…
Cosmic-ray flux predictions and observations for and with Metis on board Solar Orbiter
C. Grimani, V. Andretta, P. Chioetto +41
The Metis coronagraph is one of the remote sensing instruments hosted on board the ESA/NASA Solar Orbiter mission. Metis is devoted to carry out the first simultaneous imaging of t…
Characteristics and energy dependence of recurrent galactic cosmic-ray flux depressions and of a Forbush decrease with LISA Pathfinder
M. Armano, H. Audley, J. Baird +82
Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by the solar activity, the solar polarity and structures of solar and interplanetary origin…
First light observations of the solar wind in the outer corona with the Metis coronagraph
M. Romoli, E. Antonucci, V. Andretta +65
The investigation of the wind in the solar corona initiated with the observations of the resonantly scattered UV emission of the coronal plasma obtained with UVCS-SOHO, designed to…
Statistical study of electron density turbulence and ion-cyclotron waves in the inner heliosphere: Solar Orbiter observations
F. Carbone, L. Sorriso-Valvo, Yu. V. Khotyaintsev +27
The recently released spacecraft potential measured by the RPW instrument on-board Solar Orbiter has been used to estimate the solar wind electron density in the inner heliosphere.…
Turbulence in the Sub-Alfvénic Solar Wind
G. P. Zank, L. -L. Zhao, L. Adhikri +5
Parker Solar Probe (PSP) entered a region of the sub-Alfvenic solar wind during encounter 8 and we present the first detailed analysis of low-frequency turbulence properties in thi…
Eruptive events with exceptionally bright emission in HI Ly-alpha observed by the Metis coronagraph
G. Russano, V. Andretta, Y. De Leo +29
Metis, the coronagraph on board Solar Orbiter, provides for the first time coronagraphic imaging in the ultraviolet HI Ly-alpha line and, simultaneously, in polarized visible light…
Linking Fluid and Kinetic Scales in Solar Wind Turbulence
D. Telloni, R. Bruno
We investigate possible links between the large-scale and small-scale features of solar wind fluctuations across the frequency break separating fluid and kinetic regimes. The aim i…
Detection of plasma fluctuations in white-light images of the outer solar corona: investigation of the spatial and temporal evolution
D. Telloni, R. Ventura, P. Romano +2
This work focus on the first results on the identification and characterization of periodic plasma density fluctuations in the outer corona, observed in STEREO-A COR1 white-light i…
Radial evolution of intermittency of density fluctuations in the fast solar wind
R. Bruno, D. Telloni, L. Primavera +6
We study the radial evolution of intermittency of density fluctuations in the fast solar wind. The study is performed analyzing the plasma density measurements provided by Helios 2…
The Solar Orbiter Science Activity Plan: translating solar and heliospheric physics questions into action
I. Zouganelis, A. De Groof, A. P. Walsh +182
Solar Orbiter is the first space mission observing the solar plasma both in situ and remotely, from a close distance, in and out of the ecliptic. The ultimate goal is to understand…
Solar wind magnetic field background spectrum from fluid to kinetic scales
R. Bruno, D. Telloni, D. DeIure +1
The solar wind is highly structured in fast and slow flows. These two dynamical regimes remarkably differ not only for the average values of magnetic field and plasma parameters bu…
Alfvénic solar wind intervals observed by Solar Orbiter: Exploiting the capability of the SWA plasma suite and source region investigation
R. D'Amicis, J. M. Raines, S. Benella +32
Fast and slow solar wind have distinct properties linked to their solar sources.Alfvénic slow wind complicates the usual speed-based classification, especially at intermediate spe…
Turbulence/wave transmission at an ICME-driven shock observed by Solar Orbiter and Wind
L. L. Zhao, G. P. Zank, J. S. He +10
Solar Orbiter observed an interplanetary coronal mass ejection (ICME) event at 0.8 AU on 2020 April 19. The ICME was also observed by Wind at 1 AU on 2020 April 20. An interplaneta…
Radio evidence for a shock wave reflected by a coronal hole
S. Mancuso, A. Bemporad, F. Frassati +4
We report the first unambiguous observational evidence in the radio range of the reflection of a coronal shock wave at the boundary of a coronal hole. The event occurred above an a…
Comparing extrapolations of the coronal magnetic field structure at 2.5 solar radii with multi-viewpoint coronagraphic observations
C. Sasso, R. F. Pinto, V. Andretta +19
The magnetic field shapes the structure of the solar corona but we still know little about the interrelationships between the coronal magnetic field configurations and the resultin…
Differential rotation of the solar corona: A new data-adaptive multiwavelength approach
S. Mancuso, S. Giordano, D. Barghini +1
For the purpose of investigating the differential rotation of the solar corona, we analyzed ultraviolet (UV) spectral line observations acquired on both the east and west limbs at…
Slow wind belt in the quiet solar corona
E. Antonucci, C. Downs, G. E. Capuano +16
The slow solar wind belt in the quiet corona, observed with the Metis coronagraph on board Solar Orbiter on May 15, 2020, during the activity minimum of the cycle 24, in a field of…
Search for low energy neutrinos in correlation with the 8 events observed by the EXPLORER and NAUTILUS detectors in 2001
M. Aglietta, P. Antonioli, G. Bari +24
We report on a search for low-energy neutrino (antineutrino) bursts in correlation with the 8 time coincident events observed by the gravitational waves detectors EXPLORER and NAUT…
Three-dimensional reconstruction of type U radio bursts: a novel remote sensing approach for coronal loops
S. Mancuso, D. Barghini, A. Bemporad +5
Type U radio bursts are impulsive coherent radio emissions produced by the Sun that indicate the presence of subrelativistic electron beams propagating along magnetic loops in the…
Spectral Slope Variation at Proton Scales from Fast to Slow Solar Wind
R. Bruno, L. Trenchi, D. Telloni
We investigated the behavior of the spectral slope of interplanetary magnetic field fluctuations at proton scales for selected high resolution time intervals from WIND and MESSENGE…
Interplanetary medium monitoring with LISA: lessons from LISA Pathfinder
A. Cesarini, C. Grimani, S. Benella +4
The Laser Interferometer Space Antenna (LISA) of the European Space Agency (ESA) will be the first low-frequency gravitational-wave observatory orbiting the Sun at 1 AU. The LISA P…
Metis Observations of Alfvénic Outflows Driven by Interchange Reconnection in a Pseudostreamer
P. Romano, P. Wyper, V. Andretta +33
This study presents observations of a large pseudostreamer solar eruption and, in particular, the post-eruption relaxation phase, as captured by Metis onboard the Solar Orbiter on…
Spacecraft and interplanetary contributions to the magnetic environment on-board LISA Pathfinder
M. Armano, H. Audley, J. Baird +79
LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for a gravitational wave observatory in space. Magnetically driven forc…
Possible evidence of induced repetitive magnetic reconnection in a superflare from a young solar-type star
S. Mancuso, D. Barghini, D. Telloni
We report the detection of multiple quasi-periodic pulsations (QPPs) observed during the flaring activity of KIC 8414845, a young, active solar-type star observed by the Kepler mis…
Spectral Features of Magnetic Fluctuations at Proton Scales from Fast to Slow Solar Wind
R. Bruno, D. Telloni
This Letter investigates the spectral characteristics of the interplanetary magnetic field fluctuations at proton scales during several time intervals chosen along the speed profil…
Forbush decreases and 2-day GCR flux non-recurrent variations studied with LISA Pathfinder
C. Grimani, M. Armano, H. Audley +82
Non-recurrent short term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n were observed between 2016 February 18 and 2017 July 3 aboard the European Space Age…
First detection of acoustic-like flux in the middle solar corona
V. Andretta, L. Abbo, G. Jerse +28
Waves are thought to play a significant role in the heating of the solar atmosphere and the acceleration of the wind. Among the many types of waves observed in the Sun, the so-call…
The low-frequency break observed in the slow solar wind magnetic spectra
R. Bruno, D. Telloni, L. Sorriso-Valvo +3
Fluctuations of solar wind magnetic field and plasma parameters exhibit a typical turbulence power spectrum with a spectral index ranging between and . In pa…
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…