R. D’Amicis
A5090225814- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Stellar, planetary, and galactic studies
- Solar Radiation and Photovoltaics
- Spacecraft Design and Technology
- Geophysics and Gravity Measurements
- Space Satellite Systems and Control
- Planetary Science and Exploration
- Global Energy and Sustainability Research
- Earthquake Detection and Analysis
- Complex Systems and Time Series Analysis
- Market Dynamics and Volatility
- Advanced Thermodynamics and Statistical Mechanics
- Atomic and Subatomic Physics Research
- Fluid Dynamics and Turbulent Flows
- Gamma-ray bursts and supernovae
- Statistical Methods and Bayesian Inference
- Cyclone Separators and Fluid Dynamics
- Advanced Sensor Technologies Research
- Space Science and Extraterrestrial Life
- Plasma Diagnostics and Applications
- Quantum, superfluid, helium dynamics
- Advanced Frequency and Time Standards
Institute for Space Astrophysics and Planetology
2014-2024
National Institute for Astrophysics
2012-2024
Osservatorio Astrofisico di Torino
2012
Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano
2007
University of L'Aquila
2005
National Academies of Sciences, Engineering, and Medicine
2003
Sapienza University of Rome
2002
The Solar Orbiter mission seeks to make connections between the physical processes occurring at Sun or in solar corona and nature of wind created by those which is subsequently observed spacecraft. also targets itself during its journey from source To meet specific science goals, will be equipped with both remote-sensing in-situ instruments unprecedented measurements atmosphere inner heliosphere. A crucial set provided Wind Analyser (SWA) suite instruments. This consists an Electron System...
Metis is the first solar coronagraph designed for a space mission capable of performing simultaneous imaging off-limb corona in both visible and UV light. The observations obtained with aboard Solar Orbiter ESA-NASA observatory will enable us to diagnose, unprecedented temporal coverage spatial resolution, structures dynamics full from 1.7 $R_\odot$ about 9 $R_\odot$. Due uniqueness profile, be able observe close vantage point (down 0.28 AU), achieving out-of-ecliptic views increase orbit...
Abstract Launched on 12 Aug. 2018, NASA’s Parker Solar Probe had completed 13 of its scheduled 24 orbits around the Sun by Nov. 2022. The mission’s primary science goal is to determine structure and dynamics Sun’s coronal magnetic field, understand how solar corona wind are heated accelerated, what processes accelerate energetic particles. returned a treasure trove data that far exceeded quality, significance, quantity expectations, leading significant number discoveries reported in nearly...
Alfvénic fluctuations are a common feature in the solar wind and found especially trailing edges of fast streams. The slow usually has lower degree Alfvénicity, being more strongly intermixed with structures non-Alfvénic nature. In present paper we show first evidence interplanetary space two different kinds wind: one coming from coronal streamers or active regions characterized by other highly originating boundary holes. character fluctuations, either outward inward, can be studied means...
Solar Orbiter is the first space mission observing solar plasma both in situ and remotely, from a close distance, out of ecliptic. The ultimate goal to understand how Sun produces controls heliosphere, filling System driving planetary environments. With six remote-sensing four in-situ instrument suites, coordination planning operations are essential address following top-level science questions: (1) What drives wind where does coronal magnetic field originate? (2) How do transients drive...
Abstract The first radial alignment between Parker Solar Probe and Orbiter spacecraft is used to investigate the evolution of solar wind turbulence in inner heliosphere. Assuming ballistic propagation, two 1.5 hr intervals are tentatively identified as providing measurements same plasma parcels traveling from 0.1 1 au. Using magnetic field both spacecraft, properties assessed. Magnetic spectral density, flatness, high-order moment scaling laws calculated. Hilbert–Huang transform additionally...
Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by Parker Solar Probe. The switchbacks' formation mechanism and sources still unresolved, although candidate mechanisms include Alfv\'enic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, geometrical effects related to spiral. This Letter presents observations from Metis coronagraph onboard Orbiter a single propagating S-shaped vortex,...
Alfv\'enic fluctuations are very common features in the solar wind and found especially within main portion of fast streams while slow usually is less more variable. In general, show many differences which span from large scale structure to small phenomena including also a different turbulent behaviour. Recent studies, however, have shown that even can be sometimes highly with as those wind. The present study devoted facets this for example source regions their connection coronal structures,...
The magnetic field measurements of the FIELDS instrument on Parker Solar Probe (PSP) have shown intensities, throughout its first solar encounter, that require a very low source surface (SS) height () to be reconciled with at Sun via potential extrapolation (PFSS). However, during PSP's second situation went back more classic SS (). Here we use high-resolution observations photospheric (Solar Dynamics Observatory/Helioseismic and Magnetic Imager) calculate neutral lines boundaries open...
Abstract. Swarm is the European Space Agency (ESA)'s first Earth observation constellation mission, which was launched in 2013 to study geomagnetic field and its temporal evolution. Two Langmuir probes aboard each of three satellites provide situ measurements plasma parameters, contribute ionospheric dynamics. To maintain a high data quality for scientific technical applications, products are continuously monitored validated via science-oriented diagnostics. This paper presents an overview...
Aims. Solar Orbiter launched in February 2020 with the goal of revealing connections between Sun’s interior, atmosphere, and heliosphere. The Heavy Ion Sensor (HIS) is a time-of-flight ion mass spectrometer dedicated to measuring heavy ions solar wind. Methods. We present an overview first measurements composition from HIS, reviewing methods used transform spectra obtained on board into scientific data products examining two wind case studies as well statistical properties observed by HIS....
The ambient solar wind that fills the heliosphere originates from multiple sources in corona and is highly structured. It often described as high-speed, relatively homogeneous, plasma streams coronal holes slow-speed, variable, whose source regions are under debate. A key goal of ESA/NASA's Solar Orbiter mission to identify understand what drives complexity seen heliosphere. By combining magnetic field modelling spectroscopic techniques with high-resolution observations measurements, we show...
The occurrence and nature of a nonlinear energy cascade within the intermediate scales solar wind Alfvénic turbulence represents an important open issue. Using in situ measurements fast, high latitude taken by Ulysses spacecraft at minima, it is possible to show that imbalanced only observed when owns peculiar properties. These are reduction local correlation between velocity magnetic field (weak cross-helicity); presence large-scale shears; steepening extension down low frequencies...
Fluctuations of solar wind magnetic field and plasma parameters exhibit a typical turbulence power spectrum with spectral index ranging between $\sim -5/3$ -3/2$. In particular, at $1$ AU, the spectrum, observed within fast corotating streams, also shows clear steepening for frequencies higher than proton scales, order 3\times10^{-1}$ Hz, flattening towards $1/f$ lower 10^{-3}$ Hz. However, current literature reports observations low-frequency break only streams. Slow as to date, have not...
The investigation of the wind in solar corona initiated with observations resonantly scattered UV emission coronal plasma obtained UVCS-SOHO, designed to measure outflow speed by applying Doppler dimming diagnostics. Metis on Solar Orbiter complements UVCS spectroscopic observations, performed during activity cycle 23, simultaneously imaging polarized visible light and HI Ly-alpha order obtain high-spatial temporal resolution maps outward velocity continuously expanding atmosphere. May 15,...
Abstract Comparative studies of fast and slow solar wind streams performed over the past decades have illustrated several differences between plasma regimes for these different flows, examples including features such as temperatures, particle distribution function anisotropies, nature embedded turbulence, specifically Alfvénicity fluctuations. Though this two‐state classification primarily based on flow speed has been widely adopted, more in depth found that should be further categorized,...
Abstract From 2022 March 18 to 21, NOAA Active Region (AR) 12967 was tracked simultaneously by Solar Orbiter at 0.35 au and Hinode/EIS Earth. During this period, strong blueshifted plasma upflows were observed along a thin, dark corridor of open magnetic field originating the AR’s leading polarity continuing toward southern extension northern polar coronal hole. A potential source surface model shows large lateral expansion corridor. Squashing factor Q -maps large-scale topology further...
In the corona, plasma is accelerated to hundreds of kilometers per second, and heated temperatures times hotter than Sun's surface, before it escapes form solar wind. Decades space-based experiments have shown that energization process does not stop after escapes. Instead, wind continues accelerate cools far more slowly a freely-expanding adiabatic gas. Recent work suggests fast requires additional momentum beyond what can be provided by observed thermal pressure gradients alone whereas...
Abstract In the corona, plasma is accelerated to hundreds of kilometers per second and heated temperatures times hotter than Sun's surface before it escapes form solar wind. Decades space-based experiments have shown that energization process does not stop after escapes. Instead, wind continues accelerate, cools far more slowly a freely expanding adiabatic gas. Recent work suggests fast requires additional momentum beyond what can be provided by observed thermal pressure gradients alone,...
Solar wind, classified by its bulk speed and the Alfvénic nature of fluctuations, generates heliosphere. The elusive physical processes responsible for generation different types this wind are a topic active debate. Recent observations reveal intermittent jets, with kinetic energy in picoflare range, emerging from dark areas polar coronal hole threaded open magnetic field lines. These could substantially contribute to solar wind. However, their ubiquity direct links have not been...
Ion beams are non Maxwellian features frequently observed in solar wind ion distribution functions. These appear as two distinct populations of ions with the same charge state but different bulk velocities. While various mechanisms – such magnetic reconnection and resonant wave-particle interactions have been proposed to explain their formation, origin remains an open question a subject ongoing debate.To better understand kinetic processes driving particle acceleration, it is...
The solar wind is highly turbulent, which results in power-law spectra and intermittency for magnetic velocity fluctuations within the inertial range. Using fast intervals measured during minima between 0.3 au 3.16 au, a clear break emerges traditional range, with signatures of two sub-ranges f-3/2 and f-5/3 power laws power spectra. intermittency, through scaling law kurtosis field fluctuations, further confirms existence different separated by break. A systematic...
The stability of weakly collisional plasmas is well represented by linear theory, and the generated waves play an essential role in thermodynamics these systems. velocity distribution functions (VDF) characterizing kinetic particle behavior are commonly as a sum anisotropic bi-Maxwellians. A three bi-Maxwellian model applied for ions, assuming that VDF consists proton core, beam, single He (alpha) population, each with their own density, bulk velocity, temperature. Resolving alpha beam...
The very first observations by Mariner 5 highlighted the presence of Alfvénic fluctuations in solar wind identified as nearly incompressible accompanied large correlations between velocity and magnetic field components predicted magnetohydrodynamics (MHD) theory. Since then, have been observed to be ubiquitous especially high-speed streams, but are also some cases slow which may turn exhibit a strong character. so-called resembles fast many aspects, differ from it. Indeed, recent...
Plasma Observatory (PMO) is a candidate for the ESA Directorate of Science M7 mission call, currently in Phase A. It multi-scale concept with capability to resolve scale coupling and non-planarity/non-stationarity plasma energization energy transport.On board mothercraft, Particle Processing Unit (PPU-M) will be single interface between spacecraft all particle instruments: Electron Chamber (EPC-M), Ion Mass Spectrometer (IMS) Energetic Experiment (EPE-M). The PPU-M provides power, telemetry,...