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1. Forecasting Geoffective Events from Solar Wind Data and Evaluating the Most Predictive Features through Machine Learning Approaches

Author: Guastavino, Sabrina, Bahamazava, Katsiaryna, Perracchione, Emma, Camattari, Fabiana, Audone, Gianluca, Telloni, Daniele, Susino, Roberto, Nicolini, Gianalfredo, Fineschi, Silvano, Piana, Michele, and Massone, Anna Maria
Subjects: Physics - Space Physics, Astrophysics - Solar and Stellar Astrophysics, Computer Science - Artificial Intelligence, 85-08, 68T07, 68T05
Abstract: This study addresses the prediction of geomagnetic disturbances by exploiting machine learning techniques. Specifically, the Long-Short Term Memory recurrent neural network, which is particularly suited for application over long time series, is employed in the analysis of in-situ measurements of solar wind plasma and magnetic field acquired over more than one solar cycle, from $2005$ to $2019$, at the Lagrangian point L$1$. The problem is approached as a binary classification aiming to predict one hour in advance a decrease in the SYM-H geomagnetic activity index below the threshold of $-50$ nT, which is generally regarded as indicative of magnetospheric perturbations. The strong class imbalance issue is tackled by using an appropriate loss function tailored to optimize appropriate skill scores in the training phase of the neural network. Beside classical skill scores, value-weighted skill scores are then employed to evaluate predictions, suitable in the study of problems, such as the one faced here, characterized by strong temporal variability. For the first time, the content of magnetic helicity and energy carried by solar transients, associated with their detection and likelihood of geo-effectiveness, were considered as input features of the network architecture. Their predictive capabilities are demonstrated through a correlation-driven feature selection method to rank the most relevant characteristics involved in the neural network prediction model. The optimal performance of the adopted neural network in properly forecasting the onset of geomagnetic storms, which is a crucial point for giving real warnings in an operational setting, is finally showed.
Published: 2024

2. Tomography of the Solar Corona with the Metis Coronagraph II: Three-Dimensional Reconstructions of the Electron Density and Comparison with Reconstructions Based on LASCO-C2

Author: Vásquez, Alberto M., Nuevo, Federico A., Romoli, Marco, Lamy, Philippe, Frassati, Federica, Gilardy, Hugo, Frazin, Richard A., Bemporad, Alessandro, Abbo, Lucia, De Leo, Yara, Jerse, Giovanna, Landini, Federico, Russano, Giuliana, Sasso, Clementina, Susino, Roberto, and Uslenghi, Michela
Published: 2024
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3. Particle monitoring capability of the Solar Orbiter Metis coronagraph through the increasing phase of solar cycle 25

Author: Grimani, Catia, Andretta, Vincenzo, Antonucci, Ester, Chioetto, Paolo, Da Deppo, Vania, Fabi, Michele, Gissot, Samuel, Jerse, Giovanna, Messerotti, Mauro, Naletto, Giampiero, Pancrazzi, Maurizio, Persici, Andrea, Plainaki, Christina, Romoli, Marco, Sabbatini, Federico, Spadaro, Daniele, Stangalini, Marco, Telloni, Daniele, Teriaca, Luca, Uslenghi, Michela, Villani, Mattia, Abbo, Lucia, Burtovoi, Aleksandr, Frassati, Federica, Landini, Federico, Nicolini, Giana, Russano, Giuliana, Sasso, Clementina, and Susino, Roberto
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Physics - Space Physics
Abstract: Context. Galactic cosmic rays (GCRs) and solar particles with energies greater than tens of MeV penetrate spacecraft and instruments hosted aboard space missions. The Solar Orbiter Metis coronagraph is aimed at observing the solar corona in both visible (VL) and ultraviolet (UV) light. Particle tracks are observed in the Metis images of the corona. An algorithm has been implemented in the Metis processing electronics to detect the VL image pixels crossed by cosmic rays. This algorithm was initially enabled for the VL instrument only, since the process of separating the particle tracks in the UV images has proven to be very challenging. Aims. We study the impact of the overall bulk of particles of galactic and solar origin on the Metis coronagraph images. We discuss the effects of the increasing solar activity after the Solar Orbiter mission launch on the secondary particle production in the spacecraft. Methods. We compared Monte Carlo simulations of GCRs crossing or interacting in the Metis VL CMOS sensor to observations gathered in 2020 and 2022. We also evaluated the impact of solar energetic particle events of different intensities on the Metis images. Results. The study of the role of abundant and rare cosmic rays in firing pixels in the Metis VL images of the corona allows us to estimate the efficiency of the algorithm applied for cosmic-ray track removal from the images and to demonstrate that the instrument performance had remained unchanged during the first two years of the Solar Orbiter operations. The outcome of this work can be used to estimate the Solar Orbiter instrument's deep charging and the order of magnitude for energetic particles crossing the images of Metis and other instruments such as STIX and EUI., Comment: 8 pages, 6 figures
Published: 2023
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4. Coronal Heating Rate in the Slow Solar Wind

Author: Telloni, Daniele, Romoli, Marco, Velli, Marco, Zank, Gary P., Adhikari, Laxman, Downs, Cooper, Burtovoi, Aleksandr, Susino, Roberto, Spadaro, Daniele, Zhao, Lingling, Liberatore, Alessandro, Shi, Chen, De Leo, Yara, Abbo, Lucia, Frassati, Federica, Jerse, Giovanna, Landini, Federico, Nicolini, Gianalfredo, Pancrazzi, Maurizio, Russano, Giuliana, Sasso, Clementina, Andretta, Vincenzo, Da Deppo, Vania, Fineschi, Silvano, Grimani, Catia, Heinzel, Petr, Moses, John D., Naletto, Giampiero, Stangalini, Marco, Teriaca, Luca, Uslenghi, Michela, Berlicki, Arkadiusz, Bruno, Roberto, Capobianco, Gerardo, Capuano, Giuseppe E., Casini, Chiara, Casti, Marta, Chioetto, Paolo, Corso, Alain J., D'Amicis, Raffaella, Fabi, Michele, Frassetto, Fabio, Giarrusso, Marina, Giordano, Silvio, Guglielmino, Salvo L., Magli, Enrico, Massone, Giuseppe, Messerotti, Mauro, Nisticò, Giuseppe, Pelizzo, Maria G., Reale, Fabio, Romano, Paolo, Schühle, Udo, Solanki, Sami K., Straus, Thomas, Ventura, Rita, Volpicelli, Cosimo A., Zangrilli, Luca, Zimbardo, Gaetano, Zuppella, Paola, Bale, Stuart D., and Kasper, Justin C.
Subjects: Astrophysics - Solar and Stellar Astrophysics, Physics - Space Physics
Abstract: 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 same coronal plasma volume with the Solar Orbiter/Metis and the Parker Solar Probe instruments, respectively, and relies on the basic solar wind magnetohydrodynamic equations. As expected, energy losses are a minor fraction of the solar wind energy flux, since most of the energy dissipation that feeds the heating and acceleration of the coronal flow occurs much closer to the Sun than the heights probed in the present study, which range from 6.3 to 13.3 solar radii. The energy deposited to the supersonic wind is then used to explain the observed slight residual wind acceleration and to maintain the plasma in a non-adiabatic state. As derived in the Wentzel-Kramers-Brillouin limit, the present energy transfer rate estimates provide a lower limit, which can be very useful in refining the turbulence-based modeling of coronal heating and subsequent solar wind acceleration.
Published: 2023

5. Physics-driven machine learning for the prediction of coronal mass ejections' travel times

Author: Guastavino, Sabrina, Candiani, Valentina, Bemporad, Alessandro, Marchetti, Francesco, Benvenuto, Federico, Massone, Anna Maria, Susino, Roberto, Telloni, Daniele, Fineschi, Silvano, and Piana, Michele
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Computer Science - Machine Learning, Physics - Space Physics, 68T07, 85-08, 65K10
Abstract: Coronal Mass Ejections (CMEs) correspond to dramatic expulsions of plasma and magnetic field from the solar corona into the heliosphere. CMEs are scientifically relevant because they are involved in the physical mechanisms characterizing the active Sun. However, more recently CMEs have attracted attention for their impact on space weather, as they are correlated to geomagnetic storms and may induce the generation of Solar Energetic Particles streams. In this space weather framework, the present paper introduces a physics-driven artificial intelligence (AI) approach to the prediction of CMEs travel time, in which the deterministic drag-based model is exploited to improve the training phase of a cascade of two neural networks fed with both remote sensing and in-situ data. This study shows that the use of physical information in the AI architecture significantly improves both the accuracy and the robustness of the travel time prediction.
Published: 2023

6. Does Turbulence along the Coronal Current Sheet Drive Ion Cyclotron Waves?

Author: Telloni, Daniele, Zank, Gary P., Adhikari, Laxman, Zhao, Lingling, Susino, Roberto, Antonucci, Ester, Fineschi, Silvano, Stangalini, Marco, Grimani, Catia, Sorriso-Valvo, Luca, Verscharen, Daniel, Marino, Raffaele, Giordano, Silvio, D'Amicis, Raffaella, Perrone, Denise, Carbone, Francesco, Liberatore, Alessandro, Bruno, Roberto, Zimbardo, Gaetano, Romoli, Marco, Andretta, Vincenzo, Da Deppo, Vania, Heinzel, Petr, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Teriaca, Luca, Burtovoi, Aleksandr, De Leo, Yara, Jerse, Giovanna, Landini, Federico, Pancrazzi, Maurizio, Sasso, Clementina, and Slemer, Alessandra
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: Evidence for the presence of ion cyclotron waves, driven by turbulence, at the boundaries of the current sheet is reported in this paper. By exploiting the full potential of the joint observations performed by Parker Solar Probe and the Metis coronagraph on board Solar Orbiter, local measurements of the solar wind can be linked with the large-scale structures of the solar corona. The results suggest that the dynamics of the current sheet layers generates turbulence, which in turn creates a sufficiently strong temperature anisotropy to make the solar-wind plasma unstable to anisotropy-driven instabilities such as the Alfv\'en ion-cyclotron, mirror-mode, and firehose instabilities. The study of the polarization state of high-frequency magnetic fluctuations reveals that ion cyclotron waves are indeed present along the current sheet, thus linking the magnetic topology of the remotely imaged coronal source regions with the wave bursts observed in situ. The present results may allow improvement of state-of-the-art models based on the ion cyclotron mechanism, providing new insights into the processes involved in coronal heating., Comment: 12 pages
Published: 2023
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7. Connecting Solar Orbiter remote-sensing observations and Parker Solar Probe in-situ measurements with a numerical MHD reconstruction of the Parker spiral

Author: Biondo, Ruggero, Bemporad, Alessandro, Pagano, Paolo, Telloni, Daniele, Reale, Fabio, Romoli, Marco, Andretta, Vincenzo, Antonucci, Ester, Da Deppo, Vania, De Leo, Yara, Fineschi, Silvano, Heinzel, Petr, Moses, Daniel, Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Stangalini, Marco, Teriaca, Luca, Landini, Federico, Sasso, Clementina, Susino, Roberto, Jerse, Giovanna, Uslenghi, Michela, and Pancrazzi, Maurizio
Subjects: Astrophysics - Solar and Stellar Astrophysics, Physics - Plasma Physics, Physics - Space Physics
Abstract: As a key feature, NASA's Parker Solar Probe (PSP) and ESA-NASA's Solar Orbiter (SO) missions cooperate to trace solar wind and transients from their sources on the Sun to the inner interplanetary space. The goal of this work is to accurately reconstruct the interplanetary Parker spiral and the connection between coronal features observed remotely by the Metis coronagraph on-board SO and those detected in situ by PSP at the time of the first PSP-SO quadrature of January 2021. We use the Reverse In-situ and MHD Approach (RIMAP), a hybrid analytical-numerical method performing data-driven reconstructions of the Parker spiral. RIMAP solves the MHD equations on the equatorial plane with the PLUTO code, using the measurements collected by PSP between 0.1 and 0.2 AU as boundary conditions. Our reconstruction connects density and wind speed measurements provided by Metis (3-6 solar radii) to those acquired by PSP (21.5 solar radii) along a single streamline. The capability of our MHD model to connect the inner corona observed by Metis and the super Alfv\'enic wind measured by PSP, not only confirms the research pathways provided by multi-spacecraft observations, but also the validity and accuracy of RIMAP reconstructions as a possible test bench to verify models of transient phenomena propagating across the heliosphere, such as coronal mass ejections, solar energetic particles and solar wind switchbacks., Comment: Astronomy & Astrophysics, Solar Orbiter First Results (Nominal Mission Phase), (in press) DOI: 10.1051/0004-6361/202244535
Published: 2022
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8. Observation of Magnetic Switchback in the Solar Corona

Author: Telloni, Daniele, Zank, Gary P., Stangalini, Marco, Downs, Cooper, Liang, Haoming, Nakanotani, Masaru, Andretta, Vincenzo, Antonucci, Ester, Sorriso-Valvo, Luca, Adhikari, Laxman, Zhao, Lingling, Marino, Raffaele, Susino, Roberto, Grimani, Catia, Fabi, Michele, D'Amicis, Raffaella, Perrone, Denise, Bruno, Roberto, Carbone, Francesco, Mancuso, Salvatore, Romoli, Marco, Da Deppo, Vania, Fineschi, Silvano, Heinzel, Petr, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Teriaca, Luca, Frassati, Federica, Jerse, Giovanna, Landini, Federico, Pancrazzi, Maurizio, Russano, Giuliana, Sasso, Clementina, Berghmans, David, Auchère, Frédéric, Cuadrado, Regina Aznar, Chitta, Lakshmi P., Harra, Louise, Kraaikamp, Emil, Long, David M., Mandal, Sudip, Parenti, Susanna, Pelouze, Gabriel, Peter, Hardi, Rodriguez, Luciano, Schühle, Udo, Schwanitz, Conrad, Smith, Phil J., Verbeeck, Cis, and Zhukov, Andrei N.
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by the Parker Solar Probe. The switchbacks' formation mechanism and sources are still unresolved, although candidate mechanisms include Alfv\'enic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, and geometrical effects related to the Parker spiral. This Letter presents observations from the Metis coronagraph onboard Solar Orbiter of a single large propagating S-shaped vortex, interpreted as first evidence of a switchback in the solar corona. It originated above an active region with the related loop system bounded by open-field regions to the East and West. Observations, modeling, and theory provide strong arguments in favor of the interchange reconnection origin of switchbacks. Metis measurements suggest that the initiation of the switchback may also be an indicator of the origin of slow solar wind.
Published: 2022
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9. Space weather-related activities and projects on-going at INAF-Turin Observatory

Author: Bemporad, Alessandro, Fineschi, Silvano, Abbo, Lucia, Benna, Carlo, Biondo, Ruggero, Capobianco, Gerardo, Carella, Francesco, Cora, Alberto, Frassati, Federica, Giordano, Silvio, Haudemand, Hervé, Landini, Federico, Loreggia, Davide, Mancuso, Salvatore, Mignone, Andrea, Nicolini, Gianalfredo, Pancrazzi, Maurizio, Salvati, Francesco, Susino, Roberto, Telloni, Daniele, and Zangrilli, Luca
Published: 2023
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10. Sky Brightness evaluation at Concordia Station - Dome C, Antarctica for ground-based observations of the Solar Corona

Author: Liberatore, Alessandro, Capobianco, Gerardo, Fineschi, Silvano, Massone, Giuseppe, Zangrilli, Luca, Susino, Roberto, and Nicolini, Gianalfredo
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The evaluation of sky characteristics plays a fundamental role for many astrophysical experiments and ground-based observations. In solar physics, the main requirement for such observations is a very low sky brightness value, that is, less than one-millionth of the solar disk brightness. Few places match such requirement for ground-based, out-of-eclipse coronagraphic measurements. A candidate coronagraphic site is the Dome C plateau in Antarctica. In this paper, we show the first results of the sky brightness measurements at Dome C with the Extreme Solar Coronagraphy Antarctic Program Experiment (ESCAPE) at Italian-French Concordia Station, on Dome C, Antarctica (3300 m) during the summer XXXIV and XXXV Expeditions of the "Italian Piano Nazionale Ricerche Antartiche" (PNRA). The sky brightness measurements were carried out with the internally-occulted Antarctic coronagraph - AntarctiCor. In optimal atmospheric conditions, the sky brightness of Dome C has reached values of the order of 1.0 to 0.7 millionth of of the solar disk brightness.
Published: 2021
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11. Exploring the Solar Wind from its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter - Parker Solar Probe Quadrature

Author: Telloni, Daniele, Andretta, Vincenzo, Antonucci, Ester, Bemporad, Alessandro, Capuano, Giuseppe E., Fineschi, Silvano, Giordano, Silvio, Habbal, Shadia, Perrone, Denise, Pinto, Rui F., Sorriso-Valvo, Luca, Spadaro, Daniele, Susino, Roberto, Woodham, Lloyd D., Zank, Gary P., Romoli, Marco, Bale, Stuart D., Kasper, Justin C., Auchère, Frédéric, Bruno, Roberto, Capobianco, Gerardo, Case, Anthony W., Casini, Chiara, Casti, Marta, Chioetto, Paolo, Corso, Alain J., Da Deppo, Vania, De Leo, Yara, de Wit, Thierry Dudok, Frassati, Federica, Frassetto, Fabio, Goetz, Keith, Guglielmino, Salvo L., Harvey, Peter R., Heinzel, Petr, Jerse, Giovanna, Korreck, Kelly E., Landini, Federico, Larson, Davin, Liberatore, Alessandro, Livi, Roberto, MacDowall, Robert J., Magli, Enrico, Malaspina, David M., Massone, Giuseppe, Messerotti, Mauro, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Nisticò, Giuseppe, Panasenco, Olga, Pancrazzi, Maurizio, Pelizzo, Maria G., Pulupa, Marc, Reale, Fabio, Romano, Paolo, Sasso, Clementina, Schühle, Udo, Stangalini, Marco, Stevens, Michael L., Strachan, Leonard, Straus, Thomas, Teriaca, Luca, Uslenghi, Michela, Velli, Marco, Verscharen, Daniel, Volpicelli, Cosimo A., Whittlesey, Phyllis, Zangrilli, Luca, Zimbardo, Gaetano, and Zuppella, Paola
Subjects: Astrophysics - Solar and Stellar Astrophysics, Physics - Plasma Physics, Physics - Space Physics
Abstract: This Letter addresses the first Solar Orbiter (SO) -- Parker Solar Probe (PSP) quadrature, occurring on January 18, 2021, to investigate the evolution of solar wind from the extended corona to the inner heliosphere. Assuming ballistic propagation, the same plasma volume observed remotely in corona at altitudes between 3.5 and 6.3 solar radii above the solar limb with the Metis coronagraph on SO can be tracked to PSP, orbiting at 0.1 au, thus allowing the local properties of the solar wind to be linked to the coronal source region from where it originated. Thanks to the close approach of PSP to the Sun and the simultaneous Metis observation of the solar corona, the flow-aligned magnetic field and the bulk kinetic energy flux density can be empirically inferred along the coronal current sheet with an unprecedented accuracy, allowing in particular estimation of the Alfv\'en radius at 8.7 solar radii during the time of this event. This is thus the very first study of the same solar wind plasma as it expands from the sub-Alfv\'enic solar corona to just above the Alfv\'en surface., Comment: 10 pages, 4 figures
Published: 2021
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12. On the Possibilities of Detecting Helium D$_3$ Line Polarization with Metis

Author: Heinzel, Petr, Štěpán, Jiří, Bemporad, Alessandro, Fineschi, Silvano, Jejčič, Sonja, Labrosse, Nicolas, and Susino, Roberto
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: Space coronagraph Metis on board of the Solar Orbiter offers us new capabilities for studying eruptive prominences and coronal mass ejections (CME). Its two spectral channels, hydrogen L$\alpha$ and visible-light (VL) will provide, for the first time, co-aligned and co-temporal images to study dynamics and plasma properties of CMEs. Moreover, with the VL channel (580 - 640 nm) we find an exciting possibility to detect the helium D$_3$ line (587.73 nm) and its linear polarization. The aim of this study is to predict the diagnostics potential of this line regarding the CME thermal and magnetic structure. For a grid of models we first compute the intensity of the D$_3$ line together with VL continuum intensity due to Thomson scattering on core electrons. We show that the Metis VL channel will detect a mixture of both, with predominance of the helium emission at intermediate temperatures between 30 - 50,000 K. Then we use the code HAZEL to compute the degree of linear polarization detectable in the VL channel. This is a mixture of D$_3$ scattering polarization and continuum polarization. The former one is lowered in the presence of a magnetic field and the polarization axis is rotated (Hanle effect). Metis has the capability of measuring $Q/I$ and $U/I$ polarization degrees and we show their dependence on temperature and magnetic field. At $T$=30,000 K we find a significant lowering of $Q/I$ which is due to strongly enhanced D$_3$ line emission, while depolarization at 10 G amounts roughly to 10 \%., Comment: 11 pages, 6 figures, accepted for publication in ApJ
Published: 2020
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13. Sky Brightness Evaluation and First Coronal Signal Detection from Concordia Base (Antarctica) with a Calibrated Micropolarizer Array Camera

Author: Liberatore, Alessandro, Capobianco, Gerardo, Fineschi, Silvano, Massone, Giuseppe, Zangrilli, Luca, Susino, Roberto, and Nicolini, Gianalfredo
Published: 2023
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14. Metis: the Solar Orbiter visible light and ultraviolet coronal imager

Author: Antonucci, Ester, Romoli, Marco, Andretta, Vincenzo, Fineschi, Silvano, Heinzel, Petr, Moses, J. Daniel, Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Teriaca, Luca, Berlicki, Arkadiusz, Capobianco, Gerardo, Crescenzio, Giuseppe, Da Deppo, Vania, Focardi, Mauro, Frassetto, Fabio, Heerlein, Klaus, Landini, Federico, Magli, Enrico, Malvezzi, Andrea Marco, Massone, Giuseppe, Melich, Radek, Nicolosi, Piergiorgio, Noci, Giancarlo, Pancrazzi, Maurizio, Pelizzo, Maria G., Poletto, Luca, Sasso, Clementina, Schühle, Udo, Solanki, Sami K., Strachan, Leonard, Susino, Roberto, Tondello, Giuseppe, Uslenghi, Michela, Woch, Joachim, Abbo, Lucia, Bemporad, Alessandro, Casti, Marta, Dolei, Sergio, Grimani, Catia, Messerotti, Mauro, Ricci, Marco, Straus, Thomas, Telloni, Daniele, Zuppella, Paola, Auchère, Frederic, Bruno, Roberto, Ciaravella, Angela, Corso, Alain J., Copano, Miguel Alvarez, Cuadrado, Regina Aznar, D'Amicis, Raffaella, Enge, Reiner, Gravina, Alessio, Jejčič, Sonja, Lamy, Philippe, Lanzafame, Alessandro, Meierdierks, Thimo, Papagiannaki, Ioanna, Peter, Hardi, Rico, German Fernandez, Sertsu, Mewael Giday, Staub, Jan, Tsinganos, Kanaris, Velli, Marco, Ventura, Rita, Verroi, Enrico, Vial, Jean-Claude, Vives, Sebastien, Volpicelli, Antonio, Werner, Stephan, Zerr, Andreas, Negri, Barbara, Castronuovo, Marco, Gabrielli, Alessandro, Bertacin, Roberto, Carpentiero, Rita, Natalucci, Silvia, Marliani, Filippo, Cesa, Marco, Laget, Philippe, Morea, Danilo, Pieraccini, Stefano, Radaelli, Paolo, Sandri, Paolo, Sarra, Paolo, Cesare, Stefano, Del Forno, Felice, Massa, Ernesto, Montabone, Mauro, Mottini, Sergio, Quattropani, Daniele, Schillaci, Tiziano, Boccardo, Roberto, Brando, Rosario, Pandi, Arianna, Baietto, Cristian, Bertone, Riccardo, Alvarez-Herrero, Alberto, Parejo, Pilar García, Cebollero, María, Amoruso, Mauro, and Centonze, Vito
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Metis is the first solar coronagraph designed for a space mission capable of performing simultaneous imaging of the off-limb solar corona in both visible and UV light. The observations obtained with Metis aboard the Solar Orbiter ESA-NASA observatory will enable us to diagnose, with unprecedented temporal coverage and spatial resolution, the structures and dynamics of the full corona from 1.7 $R_\odot$ to about 9 $R_\odot$. Due to the uniqueness of the Solar Orbiter mission profile, Metis will be able to observe the solar corona from a close vantage point (down to 0.28 AU), achieving out-of-ecliptic views with the increase of the orbit inclination over time. Moreover, observations near perihelion, during the phase of lower rotational velocity of the solar surface relative to the spacecraft, will allow longer-term studies of the coronal features. Thanks to a novel occultation design and a combination of a UV interference coating of the mirrors and a spectral bandpass filter, Metis images the solar corona simultaneously in the visible light band, between 580 and 640 nm, and in the UV H I Lyman-{\alpha} line at 121.6 nm. The coronal images in both the UV Lyman-{\alpha} and polarised visible light are obtained at high spatial resolution with a spatial scale down to about 2000 km and 15000 km at perihelion, in the cases of the visible and UV light, respectively. A temporal resolution down to 1 second can be achieved when observing coronal fluctuations in visible light. The Metis measurements will allow for complete characterisation of the main physical parameters and dynamics of the electron and neutral hydrogen/proton plasma components of the corona in the region where the solar wind undergoes acceleration and where the onset and initial propagation of coronal mass ejections take place, thus significantly improving our understanding of the region connecting the Sun to the heliosphere.
Published: 2019
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15. Three Eruptions Observed by Remote Sensing Instruments Onboard Solar Orbiter

Author: Mierla, Marilena, Cremades, Hebe, Andretta, Vincenzo, Chifu, Iulia, Zhukov, Andrei N., Susino, Roberto, Auchère, Frédéric, Vourlidas, Angelos, Talpeanu, Dana-Camelia, Rodriguez, Luciano, Janssens, Jan, Nicula, Bogdan, Aznar Cuadrado, Regina, Berghmans, David, Bemporad, Alessandro, D’Huys, Elke, Dolla, Laurent, Gissot, Samuel, Jerse, Giovanna, Kraaikamp, Emil, Long, David M., Mampaey, Benjamin, Möstl, Christian, Pagano, Paolo, Parenti, Susanna, West, Matthew J., Podladchikova, Olena, Romoli, Marco, Sasso, Clementina, Stegen, Koen, Teriaca, Luca, Thompson, William, Verbeeck, Cis, and Davies, Emma
Published: 2023
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16. Measuring coronal magnetic fields with remote sensing observations of shock waves

Author: Bemporad, Alessandro, Susino, Roberto, Frassati, Federica, and Fineschi, Silvano
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: Recent works demonstrated that remote sensing observations of shock waves propagating into the corona and associated with major solar eruptions can be used to derive the strength of coronal magnetic fields met by the shock over a very large interval of heliocentric distances and latitudes. This opinion article will summarize most recent results obtained on this topic and will discuss the weaknesses and strengths of these techniques to open a constructive discussion with the scientific community., Comment: 8 pages, 1 figure
Published: 2016
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17. Study of Plasma Heating Processes in a Coronal Mass Ejection–driven Shock Sheath Region Observed with the Metis Coronagraph

Author: Frassati, Federica, primary, Bemporad, Alessandro, additional, Mancuso, Salvatore, additional, Giordano, Silvio, additional, Andretta, Vincenzo, additional, Burtovoi, Aleksandr, additional, Da Deppo, Vania, additional, Fineschi, Silvano, additional, Grimani, Catia, additional, Guglielmino, Salvo, additional, Heinzel, Petr, additional, Jerse, Giovanna, additional, Landini, Federico, additional, Liberatore, Alessandro, additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Pancrazzi, Maurizio, additional, Romano, Paolo, additional, Romoli, Marco, additional, Russano, Giuliana, additional, Sasso, Clementina, additional, Spadaro, Daniele, additional, Stangalini, Marco, additional, Susino, Roberto, additional, Teriaca, Luca, additional, Uslenghi, Michela, additional, and Zangrilli, Luca, additional
Published: 2024
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18. 3D stereoscopic analysis of a Coronal Mass Ejection and comparison with UV spectroscopic data

Author: Susino, Roberto, Bemporad, Alessandro, and Dolei, Sergio
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: A three-dimensional (3D) reconstruction of the 2007, May 20 partial-halo Coronal Mass Ejection (CME) has been made using STEREO/EUVI and STEREO/COR1 coronagraphic images. The trajectory and kinematics of the erupting filament have been derived from EUVI image pairs with the "tie-pointing" triangulation technique, while the polarization ratio technique has been applied to COR1 data to determine the average position and depth of the CME front along the line of sight. These 3D geometrical information have been combined for the first time with spectroscopic measurements of the OVI $\lambda\lambda$1031.91, 1037.61 \AA\ line profiles made with the Ultraviolet Coronagraph Spectrometer (UVCS) on board SOHO. Comparison between the prominence trajectory extrapolated at the altitude of UVCS observations and the core transit time measured from UVCS data made possible a firm identification of the CME core observed in white light and UV with the prominence plasma expelled during the CME. Results on the 3D structure of the CME front have been used to calculate synthetic spectral profiles of the OVI $\lambda\lambda1031.91$ \AA\ line expected along the UVCS slit, in an attempt to reproduce the measured line widths. Observed line widths can be reproduced within the uncertainties only in the peripheral part of the CME front; at the front center, where the distance of the emitting plasma from the plane of the sky is greater, synthetic widths turn out to be $\sim 25$% lower than the measured ones. This provides strong evidence of line broadening due to plasma heating mechanisms in addition to bulk expansion of the emitting volume.
Published: 2014
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19. Sky Brightness Evaluation at Concordia Station, Dome C, Antarctica, for Ground-Based Observations of the Solar Corona

Author: Liberatore, Alessandro, Capobianco, Gerardo, Fineschi, Silvano, Massone, Giuseppe, Zangrilli, Luca, Susino, Roberto, and Nicolini, Gianalfredo
Published: 2022
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20. Plasma heating in a post eruption Current Sheet: a case study based on ultraviolet, soft, and hard X-ray data

Author: Susino, Roberto, Bemporad, Alessandro, and Krucker, Säm
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: Off-limb observations of the solar corona after Coronal Mass Ejections (CMEs) often show strong, compact, and persistent UV sources behind the eruption. They are primarily observed by the SOHO/UVCS instrument in the "hot" Fe XVIII {\lambda}974 {\AA} line and are usually interpreted as a signature of plasma heating due to magnetic reconnection in the post-CME Current Sheet (CS). Nevertheless, the physical process itself and the altitude of the main energy release are currently not fully understood. In this work, we studied the evolution of plasma heating after the CME of 2004 July 28 by comparing UV spectra acquired by UVCS with soft X-ray (SXR) and hard X-ray (HXR)images of the post-flare loops taken by GOES/SXI and RHESSI. The X-ray data show a long-lasting extended source that is rising upwards, toward the high-temperature source detected by UVCS. UVCS data show the presence of significant non-thermal broadening in the CS (signature of turbulent motions) and a strong density gradient across the CS region. The thermal energy released in the HXR source is on the order of about 10^32 erg, a factor about 2-5 larger than the energy required to explain the high-temperature plasma sampled by UVCS. Nevertheless, the very different time evolutions of SXR and HXR sources compared to the UV emission suggest that reconnection occurring above the post-eruption arcades are not directly responsible for the high-temperature plasma sampled higher up by UVCS. We conclude that an additional plasma heating mechanism (such as turbulent reconnection) in the CS is likely required.
Published: 2013
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21. First Metis Detection of the Helium D3 Line Polarization in a Large Eruptive Prominence

Author: Heinzel, Petr, primary, Jejčič, Sonja, additional, Štěpán, Jiří, additional, Susino, Roberto, additional, Andretta, Vincenzo, additional, Russano, Giuliana, additional, Fineschi, Silvano, additional, Romoli, Marco, additional, Bemporad, Alessandro, additional, Berlicki, Arkadiusz, additional, Burtovoi, Aleksandr, additional, Da Deppo, Vania, additional, De Leo, Yara, additional, Grimani, Catia, additional, Jerse, Giovanna, additional, Landini, Federico, additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Pancrazzi, Maurizio, additional, del Pino Alemán, Tanausú, additional, Sasso, Clementina, additional, Spadaro, Daniele, additional, Stangalini, Marco, additional, Telloni, Daniele, additional, Teriaca, Luca, additional, Uslenghi, Michela, additional, and Arévalo, Andrés Vicente, additional
Published: 2023
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22. Coronal Heating Rate in the Slow Solar Wind

Author: Telloni, Daniele, primary, Romoli, Marco, additional, Velli, Marco, additional, Zank, Gary P., additional, Adhikari, Laxman, additional, Downs, Cooper, additional, Burtovoi, Aleksandr, additional, Susino, Roberto, additional, Spadaro, Daniele, additional, Zhao, Lingling, additional, Liberatore, Alessandro, additional, Shi, Chen, additional, De Leo, Yara, additional, Abbo, Lucia, additional, Frassati, Federica, additional, Jerse, Giovanna, additional, Landini, Federico, additional, Nicolini, Gianalfredo, additional, Pancrazzi, Maurizio, additional, Russano, Giuliana, additional, Sasso, Clementina, additional, Andretta, Vincenzo, additional, Da Deppo, Vania, additional, Fineschi, Silvano, additional, Grimani, Catia, additional, Heinzel, Petr, additional, Moses, John D., additional, Naletto, Giampiero, additional, Stangalini, Marco, additional, Teriaca, Luca, additional, Uslenghi, Michela, additional, Berlicki, Arkadiusz, additional, Bruno, Roberto, additional, Capobianco, Gerardo, additional, Capuano, Giuseppe E., additional, Casini, Chiara, additional, Casti, Marta, additional, Chioetto, Paolo, additional, Corso, Alain J., additional, D’Amicis, Raffaella, additional, Fabi, Michele, additional, Frassetto, Fabio, additional, Giarrusso, Marina, additional, Giordano, Silvio, additional, Guglielmino, Salvo L., additional, Magli, Enrico, additional, Massone, Giuseppe, additional, Messerotti, Mauro, additional, Nisticò, Giuseppe, additional, Pelizzo, Maria G., additional, Reale, Fabio, additional, Romano, Paolo, additional, Schühle, Udo, additional, Solanki, Sami K., additional, Straus, Thomas, additional, Ventura, Rita, additional, Volpicelli, Cosimo A., additional, Zangrilli, Luca, additional, Zimbardo, Gaetano, additional, Zuppella, Paola, additional, Bale, Stuart D., additional, and Kasper, Justin C., additional
Published: 2023
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23. Physics-driven Machine Learning for the Prediction of Coronal Mass Ejections’ Travel Times

Author: Guastavino, Sabrina, primary, Candiani, Valentina, additional, Bemporad, Alessandro, additional, Marchetti, Francesco, additional, Benvenuto, Federico, additional, Massone, Anna Maria, additional, Mancuso, Salvatore, additional, Susino, Roberto, additional, Telloni, Daniele, additional, Fineschi, Silvano, additional, and Piana, Michele,, additional
Published: 2023
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24. Energy Budget in the Solar Corona

Author: Telloni, Daniele, primary, Romoli, Marco, additional, Velli, Marco, additional, Zank, Gary P., additional, Adhikari, Laxman, additional, Zhao, Lingling, additional, Downs, Cooper, additional, Halekas, Jasper S., additional, Verniero, Jaye L., additional, McManus, Michael D., additional, Shi, Chen, additional, Burtovoi, Aleksandr, additional, Susino, Roberto, additional, Spadaro, Daniele, additional, Liberatore, Alessandro, additional, Antonucci, Ester, additional, De Leo, Yara, additional, Abbo, Lucia, additional, Frassati, Federica, additional, Jerse, Giovanna, additional, Landini, Federico, additional, Nicolini, Gianalfredo, additional, Pancrazzi, Maurizio, additional, Russano, Giuliana, additional, Sasso, Clementina, additional, Andretta, Vincenzo, additional, Da Deppo, Vania, additional, Fineschi, Silvano, additional, Grimani, Catia, additional, Heinzel, Petr, additional, Moses, John D., additional, Naletto, Giampiero, additional, Stangalini, Marco, additional, Teriaca, Luca, additional, Uslenghi, Michela, additional, Bale, Stuart D., additional, and Kasper, Justin C., additional
Published: 2023
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25. A prominence eruption from the Sun to the Parker Solar Probe with multi-spacecraft observations

Author: Niembro, Tatiana, primary, Seaton, Daniel B., additional, Hess, Phillip, additional, Berghmans, David, additional, Andretta, Vincenzo, additional, Reeves, Katharine K., additional, Riley, Pete, additional, Stevens, Michael L., additional, Landini, Federico, additional, Sasso, Clementina, additional, Verbeeck, Cis, additional, Susino, Roberto, additional, and Uslenghi, Michela, additional
Published: 2023
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26. Firefly: The Case for a Holistic Understanding of the Global Structure and Dynamics of the Sun and the Heliosphere

Author: Raouafi, Nour E., primary, Hoeksema, J. Todd, additional, Newmark, Jeffrey S., additional, Gibson, Sarah, additional, Berger, Thomas E., additional, Upton, Lisa A., additional, Vourlidas, Angelos, additional, Hassler, Donald M., additional, Kinnison, James, additional, Ho, George C., additional, Mason, Glenn M., additional, Vievering, Juliana T., additional, Viall, Nicholeen M., additional, Szabo, Adam, additional, Casti, Marta, additional, Case, Anthony W., additional, Lepri, Susan T., additional, Velli, Marco, additional, Georgoulis, Manolis K., additional, Bourouaine, Sofiane, additional, Jagarlamudi, Vamsee K., additional, Laming, John M., additional, Mason, James P., additional, Harra, Louise, additional, Madjarska, Maria, additional, Chitta, Lakshmi Pradeep, additional, Duran, J. Sebastian Castellanos, additional, Korpi-Lagg, Andreas, additional, Badman, Samuel, additional, Chifu, Iulia, additional, Lario, David, additional, Wing, Simon, additional, Bale, Stuart, additional, Paouris, Evangelos, additional, Narayanamurthy, Smitha, additional, Sinjan, Jonas, additional, Bernasconi, Pietro, additional, Krivova, Natalie, additional, Gizon, Laurent, additional, Leamon, Robert J., additional, Gosain, Sanjay, additional, Kazachenko, Maria, additional, Petrie, Gordon, additional, Pillet, Valentin Martinez, additional, Jain, Kiran, additional, Luhmann, Janet, additional, Bertello, Luca, additional, Toriumi, Shin, additional, Jiang, Chen, additional, Vasko, Ivan, additional, Harvey, John W., additional, Schad, Thomas A., additional, Jebaraj, Immanuel C., additional, Scherrer, Philip, additional, Hofmeister, Stefan, additional, Tiwari, Sanjiv, additional, Wang, Haimin, additional, Roth, Markus, additional, Panesar, Navdeep, additional, Sekii, Takashi, additional, Magyar, Norbert, additional, Guglielmino, Salvo L., additional, Parenti, Susanna, additional, Tremblay, Benoit, additional, Tziotziou, Kostas, additional, Toma, Giuliana de, additional, Chen, Bin, additional, Katsukawa, Yukio, additional, Pontieu, Bart De, additional, Cheng, Xin, additional, Cheung, Mark, additional, Kosovichev, Alexander, additional, Jiang, Jie, additional, Schunker, Hannah, additional, Kawabata, Yusuke, additional, Oba, Takayoshi, additional, Cameron, Robert, additional, Mathew, Shibu K., additional, Rodriguez, Jaime de la Cruz, additional, Kusano, Kanya, additional, Temmer, Manuela, additional, Andretta, Vincenzo, additional, Sven, Wedemeyer, additional, Samara, Evangelia, additional, Heinemann, Stephan G., additional, Warmuth, Alexander, additional, Jafarzadeh, Shahin, additional, Mackay, Duncan H., additional, Fludra, Andrzej, additional, Rubio, Luis Bellot, additional, Suárez, David Orozco, additional, Chen, Thomas Y., additional, Kontogiannis, Ioannis, additional, Yardley, Stephanie, additional, Veronig, Astrid, additional, Joshi, Jayant, additional, Spadaro, Daniele, additional, Kubo, Masahito, additional, Bose, Souvik, additional, González, Nazaret Bello, additional, Solanki, Sami, additional, Denker, Carsten, additional, Verma, Meetu, additional, Vocks, Christian, additional, Borrero, Juan Manuel, additional, Mathews, Nathaniel H., additional, Cury, Shannon, additional, Sasso, Clementina, additional, Stenborg, Guillermo, additional, Tibebu, Getachew, additional, Battams, Karl, additional, Wijsen, Nicolas, additional, Bruno, Alessandro, additional, Peter, Hardi, additional, I., Mason Emily, additional, M., Caplan Ronald, additional, Martinez-Sykora, Juan, additional, Seaton, Daniel, additional, Airapetian, Vladimir, additional, Jian, Lan, additional, Thompson, William T., additional, Ofman, Leon, additional, Wallace, Samantha, additional, Kucera, Therese, additional, Desai, Ravindra, additional, Richardson, Ian, additional, Burkepile, Joan, additional, Cranmer, Steven, additional, Strauss, R. Du Toit, additional, Murabito, Mariarita, additional, Alfred, De Wijn, additional, Xie, Hong, additional, Rempel, Matthias, additional, Webber, Shea Hess, additional, Reeves, Katharine K., additional, Hurlburt, Neal, additional, Berrilli, Francesco, additional, DeLuca, Edward, additional, Egeland, Ricky, additional, Ko, Yuan-Kuen, additional, Kee, Nathaniel Dylan, additional, Mahajan, Sushant S., additional, Craig, DeForest, additional, Wood, Brian E., additional, Chris, Chaston, additional, Nigro, Giuseppina, additional, Shaik, Shaheda Begum, additional, Gosic, Milan, additional, Shimizu, Toshifumi, additional, Zuccarello, Francesca, additional, Nitta, Nariaki, additional, Chatzistergos, Theodosios, additional, Fan, Yuhong, additional, Zhang, Jie, additional, Fehlmann, Andre, additional, Palmerio, Erika, additional, Ishikawa, Ryohtaroh T., additional, Danilovic, Sanja, additional, Skan, Moa, additional, Froment, Clara, additional, Baso, Carlos José Díaz, additional, Liang, Zhi-Chao, additional, Wit, Thierry Dudok de, additional, Barczynski, Krzysztof, additional, Johnston, Craig, additional, Pariat, Etienne, additional, Hadid, Lina, additional, Aulanier, Guillaume, additional, Brun, Allan Sacha, additional, Athanasios, Kouloumvakos, additional, Cauzzi, Gianna, additional, Dredger, Pauline, additional, French, Ryan, additional, Christian, Damian, additional, Linton, Mark, additional, Ireland, Jack, additional, Tarr, Lucas, additional, Strugarek, Antoine, additional, Uritsky, Vadim, additional, DeRosa, Marc, additional, Kretzschmar, Matthieu, additional, García, Rafael A., additional, Monteiro, Mario J. P. F. G., additional, Mathur, Savita, additional, Breton, Sylvain N., additional, Pinto, Rui F., additional, Oliveros, Juan Carlos Martinez, additional, Loper, Robert, additional, Auchère, Frédéric, additional, Wang, Tongjiang, additional, Reginald, Nelson, additional, Cunha, Margarida S., additional, Teriaca, Luca, additional, Chintzoglou, Georgios, additional, Lynch, Benjamin J., additional, Linker, Jon, additional, Beck, Paul, additional, Shannon, Jackson, additional, Clare, Benjamin, additional, Krupiarz, Christopher, additional, Whiting, Ian D., additional, Byerly, Adam, additional, Bushman, Stewart, additional, Carrelli, David, additional, Kijewski, Seth, additional, Englander, Jacob, additional, Mizes, Adam, additional, Porter, Jamie, additional, O’Neill, Michael, additional, Chattopadhyay, Debarati, additional, Albers, Joshua, additional, Rast, Mark, additional, Ermolli, Ilaria, additional, Tzeng, Nigel, additional, Hudson, James F., additional, Giunta, Alessandra, additional, Buchlin, Éric, additional, Bommier, Véronique, additional, Duncan, Nicole, additional, Janvier, Miho, additional, Strecker, Hanna, additional, Siu, Azaymi, additional, Perri, Barbara, additional, Maksimovic, Milan, additional, Vilmer, Nicole, additional, Toledo-Redondo, Sergio, additional, Kuckein, Christoph, additional, Alberti, Tommaso, additional, Antolin, Patrick, additional, Cuadrado, Regina Aznar, additional, Berghmans, David, additional, Brigitte, Schmieder, additional, Bucik, Radoslav, additional, Calchetti, Daniele, additional, Caspi, Amir, additional, Cohen, Christina, additional, Corbard, Thierry, additional, Cremades, Hebe, additional, Cummings, Alan, additional, Dhakal, Suman, additional, Dolla, Laurent, additional, Dominique, Marie, additional, Emslie, Gordon, additional, Ferrente, Fabiana, additional, Finley, Adam J., additional, Fletcher, Lyndsay, additional, Fraschetti, Federico, additional, Gafeira, Ricardo, additional, Gissot, Samuel, additional, Hegde, Dinesha, additional, Hu, Qiang, additional, Innocenti, Maria Elena, additional, Jin, Meng, additional, Klein, Kristopher, additional, Kumar, Pankaj, additional, Lacatus, Daniela, additional, Liewer, Paulett, additional, Magdalenic, Jasmina, additional, Mandal, Sudip, additional, Mandrini, Cristina H., additional, Mierla, Marilena, additional, Miralles, Mari Paz, additional, Moore, Ron, additional, Neville, Jonathan, additional, Niembro, Tatiana, additional, Nikou, Eleni, additional, Nindos, Alexander, additional, Papaioannou, Athanasios, additional, Rajaguru, S. Paul, additional, Reville, Victor, additional, Rochus, Pierre, additional, Rodriguez, Luciano, additional, Romoli, Marco, additional, Shestov, Sergei, additional, Shi, Chen, additional, Sorriso-Valvo, Luca, additional, St. Cyr, O. C., additional, Sterling, Alphohse, additional, Stevens, Michael L., additional, Susino, Roberto, additional, Swisdak, Marc, additional, Thompson, Barbara J., additional, Valliappan, Senthamizh Pavai, additional, Verbeeck, Francis, additional, Bothmer, Volker, additional, Xudong, Sun, additional, Zhukov, Andrei, additional, Katsiyannis, Thanassis, additional, Owen, Christopher, additional, Karna, Nishu, additional, Janssens, Jan, additional, Khomenko, Elena, additional, Gary, Dale, additional, Bandyopadhyay, Riddhi, additional, Chhiber, Rohit, additional, Tenerani, Anna, additional, Rouillard, Alexis, additional, Patsourakos, Spiros, additional, Anastasiadis, Anastasios, additional, Bocchialini, Karine, additional, Moraitis, Kostas, additional, Rivera, Yeimy, additional, Drake, James, additional, Baudin, Frédéric, additional, Chandran, Benjamin, additional, Dayeh, Maher, additional, Reardon, Kevin, additional, Cairns, Iver, additional, Bizien, Nina, additional, Wexler, David, additional, Bahauddin, Shah, additional, Rodriguez-Pacheco, Javier, additional, Yu, Sijie, additional, Lee, Jeongwoo, additional, Gontikakis, Costis, additional, Koukras, Alexandros, additional, Contel, Olivier Le, additional, Pezzi, Oreste, additional, Kintziger, Christian, additional, Boumier, Patrick, additional, Balasis, Georgios, additional, Dikpati, Mausumi, additional, Pesnell, W. Dean, additional, Chai, Yi, additional, Nandy, Dibyendu, additional, Charles, Arge, additional, Corti, Claudio, additional, Zhao, Lulu, additional, Matthaeus, William H., additional, Gilly, Chris R., additional, Erlandson, Robert E., additional, Derouich, Moncef, additional, Zhao, Lingling, additional, Poedts, Stefaan, additional, Vieira, Luis, additional, Adhikari, Laxman, additional, Buitrago-Casas, Juan Camilo, additional, Huang, Jia, additional, Moestl, Christian, additional, Liu, Mingzhe, additional, Oloketuyi, Jacob, additional, Zhuang, Bin, additional, Rodríguez-García, Laura, additional, Perez, Jean Carlos, additional, Xu, Zigong, additional, Kooi, Jason, additional, Woodham, Lloyd D., additional, Tripathi, Durgesh, additional, Young, Peter, additional, López-Portela, Cynthia, additional, Cuesta, Manuel Enrique, additional, and Wilson, Lynn, additional
Published: 2023
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27. Prediction Capability of Geomagnetic Events from Solar Wind Data Using Neural Networks

Author: Telloni, Daniele, primary, Schiavo, Maurizio Lo, additional, Magli, Enrico, additional, Fineschi, Silvano, additional, Guastavino, Sabrina, additional, Nicolini, Gianalfredo, additional, Susino, Roberto, additional, Giordano, Silvio, additional, Amadori, Francesco, additional, Candiani, Valentina, additional, Massone, Anna Maria, additional, and Piana, Michele, additional
Published: 2023
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28. Out-of-focus point sources image simulation for the Metis solar coronagraph onboard the Solar Orbiter mission

Author: Da Deppo, Vania, primary, Casini, Chiara, additional, Chioetto, Paolo, additional, Frassetto, Fabio, additional, Nordera, Simone, additional, Zuppella, Paola, additional, Corso, Alain J., additional, Landini, Federico, additional, Pancrazzi, Maurizio, additional, Susino, Roberto, additional, Sasso, Clementina, additional, Uslenghi, Michela, additional, Romoli, Marco, additional, Andretta, Vincenzo, additional, Fineschi, Silvano, additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Spadaro, Daniele, additional, Stangalini, Marco, additional, Teriaca, Luca, additional, Abbo, Lucia, additional, Grimani, Catia, additional, Burtovoi, Aleksandr, additional, De Leo, Yara, additional, Fabi, Michele, additional, Frassati, Federica, additional, Jerse, Giovanna, additional, and Russano, Giuliana, additional
Published: 2023
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29. In flight stray light estimate for the Solar Orbiter/Metis coronagraph

Author: Landini, Federico, primary, Romoli, Marco, additional, Nicolini, Gianalfredo, additional, Frassetto, Fabio, additional, Susino, Roberto, additional, Abbo, Lucia, additional, Andretta, Vincenzo, additional, Burtovoi, Aleksandr, additional, Casini, Chiara, additional, Chioetto, Paolo, additional, Corso, Alain J., additional, Da Deppo, Vania, additional, De Leo, Yara, additional, Fabi, Michele, additional, Fineschi, Silvano, additional, Frassati, Federica, additional, Grimani, Catia, additional, Heinzel, Petr, additional, Jerse, Giovanna, additional, Liberatore, Alessandro, additional, Naletto, Giampiero, additional, Pancrazzi, Maurizio, additional, Russano, Giuliana, additional, Sasso, Clementina, additional, Spadaro, Daniele, additional, Stangalini, Marco, additional, Telloni, Daniele, additional, Teriaca, Luca, additional, Uslenghi, Michela, additional, Volpicelli, Cosimo A., additional, and Zuppella, Paola, additional
Published: 2023
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30. Observations of the Solar Corona from Space

Author: Antonucci, Ester, Harra, Louise, Susino, Roberto, and Telloni, Daniele
Published: 2020
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31. Sky brightness evaluation and first coronal signal detection from Concordia Base (Antarctica) with a calibrated micropolarizer array camera

Author: Liberatore, Alessandro, primary, Capobianco, Gerardo, additional, Fineschi, Silvano, additional, Massone, Giuseppe, additional, Zangrilli, Luca, additional, Susino, Roberto, additional, and Nicolini, Gianalfredo, additional
Published: 2023
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32. Does Turbulence along the Coronal Current Sheet Drive Ion Cyclotron Waves?

Author: Telloni, Daniele, primary, Zank, Gary P., additional, Adhikari, Laxman, additional, Zhao, Lingling, additional, Susino, Roberto, additional, Antonucci, Ester, additional, Fineschi, Silvano, additional, Stangalini, Marco, additional, Grimani, Catia, additional, Sorriso-Valvo, Luca, additional, Verscharen, Daniel, additional, Marino, Raffaele, additional, Giordano, Silvio, additional, D’Amicis, Raffaella, additional, Perrone, Denise, additional, Carbone, Francesco, additional, Liberatore, Alessandro, additional, Bruno, Roberto, additional, Zimbardo, Gaetano, additional, Romoli, Marco, additional, Andretta, Vincenzo, additional, Da Deppo, Vania, additional, Heinzel, Petr, additional, Moses, John D., additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Spadaro, Daniele, additional, Teriaca, Luca, additional, Burtovoi, Aleksandr, additional, De Leo, Yara, additional, Jerse, Giovanna, additional, Landini, Federico, additional, Pancrazzi, Maurizio, additional, Sasso, Clementina, additional, and Slemer, Alessandra, additional
Published: 2023
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33. New results from Metis coronagraph on board of Solar Orbiter

Author: Romoli, Marco and Susino, Roberto
Abstract: Metis is the coronagraph on board of Solar Orbiter. The instrument images the extended solar corona in a field of view from 1.7 to 3 degrees in the linearly polarised visible light wavelength band 580-640nm and in the narrowband around 121.6nm HI Ly-alpha line, thus providing direct information about the two major components of the solar corona: electrons and protons in the region where the acceleration of the solar wind takes place. Given the novelty of the design and the orbital configuration, Metis provides for the first time simultaneous ultraviolet and visible light images of the solar corona, allowing to apply the Doppler dimming technique and retrieve the wind velocity on the plane of the sky. In addition, it is the first coronagraph to obtain high spatial resolution images (4000km) at high temporal cadence (down to 1s). These images are revealing the presence of acoustic wave propagation through the solar corona., The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Published: 2023

34. Study of the early phase of a Coronal Mass Ejection driven shock in EUV images

Author: Frassati, Federica, Susino, Roberto, Mancuso, Salvatore, and Bemporad, Alessandro
Published: 2017
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35. Connecting Solar Orbiter remote-sensing observations and Parker Solar Probe in situ measurements with a numerical MHD reconstruction of the Parker spiral

Author: Biondo, Ruggero, primary, Bemporad, Alessandro, additional, Pagano, Paolo, additional, Telloni, Daniele, additional, Reale, Fabio, additional, Romoli, Marco, additional, Andretta, Vincenzo, additional, Antonucci, Ester, additional, Da Deppo, Vania, additional, De Leo, Yara, additional, Fineschi, Silvano, additional, Heinzel, Petr, additional, Moses, Daniel, additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Spadaro, Daniele, additional, Stangalini, Marco, additional, Teriaca, Luca, additional, Landini, Federico, additional, Sasso, Clementina, additional, Susino, Roberto, additional, Jerse, Giovanna, additional, Uslenghi, Michela, additional, and Pancrazzi, Maurizio, additional
Published: 2022
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36. Observation and Modeling of the Solar Wind Turbulence Evolution in the Sub-Mercury Inner Heliosphere

Author: Telloni, Daniele, primary, Adhikari, Laxman, additional, Zank, Gary P., additional, Hadid, Lina Z., additional, Sánchez-Cano, Beatriz, additional, Sorriso-Valvo, Luca, additional, Zhao, Lingling, additional, Panasenco, Olga, additional, Shi, Chen, additional, Velli, Marco, additional, Susino, Roberto, additional, Verscharen, Daniel, additional, Milillo, Anna, additional, Alberti, Tommaso, additional, Narita, Yasuhito, additional, Verdini, Andrea, additional, Grimani, Catia, additional, Bruno, Roberto, additional, D’Amicis, Raffaella, additional, Perrone, Denise, additional, Marino, Raffaele, additional, Carbone, Francesco, additional, Califano, Francesco, additional, Malara, Francesco, additional, Stawarz, Julia E., additional, Laker, Ronan, additional, Liberatore, Alessandro, additional, Bale, Stuart D., additional, Kasper, Justin C., additional, Heyner, Daniel, additional, de Wit, Thierry Dudok, additional, Goetz, Keith, additional, Harvey, Peter R., additional, MacDowall, Robert J., additional, Malaspina, David M., additional, Pulupa, Marc, additional, Case, Anthony W., additional, Korreck, Kelly E., additional, Larson, Davin, additional, Livi, Roberto, additional, Stevens, Michael L., additional, Whittlesey, Phyllis, additional, Auster, Hans-Ulrich, additional, and Richter, Ingo, additional
Published: 2022
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37. Observation of a Magnetic Switchback in the Solar Corona

Author: Telloni, Daniele, primary, Zank, Gary P., additional, Stangalini, Marco, additional, Downs, Cooper, additional, Liang, Haoming, additional, Nakanotani, Masaru, additional, Andretta, Vincenzo, additional, Antonucci, Ester, additional, Sorriso-Valvo, Luca, additional, Adhikari, Laxman, additional, Zhao, Lingling, additional, Marino, Raffaele, additional, Susino, Roberto, additional, Grimani, Catia, additional, Fabi, Michele, additional, D’Amicis, Raffaella, additional, Perrone, Denise, additional, Bruno, Roberto, additional, Carbone, Francesco, additional, Mancuso, Salvatore, additional, Romoli, Marco, additional, Deppo, Vania Da, additional, Fineschi, Silvano, additional, Heinzel, Petr, additional, Moses, John D., additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Spadaro, Daniele, additional, Teriaca, Luca, additional, Frassati, Federica, additional, Jerse, Giovanna, additional, Landini, Federico, additional, Pancrazzi, Maurizio, additional, Russano, Giuliana, additional, Sasso, Clementina, additional, Biondo, Ruggero, additional, Burtovoi, Aleksandr, additional, Capuano, Giuseppe E., additional, Casini, Chiara, additional, Casti, Marta, additional, Chioetto, Paolo, additional, Leo, Yara De, additional, Giarrusso, Marina, additional, Liberatore, Alessandro, additional, Berghmans, David, additional, Auchère, Frédéric, additional, Cuadrado, Regina Aznar, additional, Chitta, Lakshmi P., additional, Harra, Louise, additional, Kraaikamp, Emil, additional, Long, David M., additional, Mandal, Sudip, additional, Parenti, Susanna, additional, Pelouze, Gabriel, additional, Peter, Hardi, additional, Rodriguez, Luciano, additional, Schühle, Udo, additional, Schwanitz, Conrad, additional, Smith, Phil J., additional, Verbeeck, Cis, additional, and Zhukov, Andrei N., additional
Published: 2022
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38. CorMag - coronal magnetograph for the stratospheric Hemera mission

Author: Fineschi, Silvano, primary, Capobianco, Gerardo, additional, Zangrilli, Luca, additional, Bonino, Donata, additional, Landini, Federico, additional, Loreggia, Davide, additional, Pancrazzi, Maurizio, additional, Susino, Roberto, additional, Bemporad, Alessandro, additional, Caracci, Valeria, additional, Amadori, Francesco, additional, and Caschera, Salvatore, additional
Published: 2022
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39. In-flight Metis radiometric performance verification using the light retro-reflected from its door

Author: Casini, Chiara, primary, Da Deppo, Vania, additional, Zuppella, Paola, additional, Chioetto, Paolo, additional, Frassetto, Fabio, additional, Romoli, Marco, additional, Landini, Federico, additional, Pancrazzi, Maurizio, additional, Andretta, Vincenzo, additional, De Leo, Yara, additional, Bemporad, Alessandro, additional, Corso, Alain Jodi, additional, Fabi, Michele, additional, Fineschi, Silvano, additional, Frassati, Federica, additional, Grimani, Catia, additional, Jerse, Giovanna, additional, Heerlein, Klaus, additional, Liberatore, Alessandro, additional, Magli, Enrico, additional, Naletto, Giampiero, additional, Nicolini, Giana, additional, Pelizzo, Maria Guglielmina, additional, Romano, Paolo, additional, Sasso, Clementina, additional, Schuehle, Udo, additional, Spadaro, Daniele, additional, Stangalini, Marco, additional, Straus, Thomas, additional, Susino, Roberto, additional, Teriaca, Luca, additional, Uslenghi, Michela, additional, Casti, Marta, additional, Heinzel, Petr, additional, and Volpicelli, Cosimo Antonio, additional
Published: 2022
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40. Linking Small-scale Solar Wind Properties with Large-scale Coronal Source Regions through Joint Parker Solar Probe–Metis/Solar Orbiter Observations

Author: Telloni, Daniele, primary, Zank, Gary P., additional, Sorriso-Valvo, Luca, additional, D’Amicis, Raffaella, additional, Panasenco, Olga, additional, Susino, Roberto, additional, Bruno, Roberto, additional, Perrone, Denise, additional, Adhikari, Laxman, additional, Liang, Haoming, additional, Nakanotani, Masaru, additional, Zhao, Lingling, additional, Hadid, Lina Z., additional, Sánchez-Cano, Beatriz, additional, Verscharen, Daniel, additional, Velli, Marco, additional, Grimani, Catia, additional, Marino, Raffaele, additional, Carbone, Francesco, additional, Mancuso, Salvatore, additional, Biondo, Ruggero, additional, Pagano, Paolo, additional, Reale, Fabio, additional, Bale, Stuart D., additional, Kasper, Justin C., additional, Case, Anthony W., additional, de Wit, Thierry Dudok, additional, Goetz, Keith, additional, Harvey, Peter R., additional, Korreck, Kelly E., additional, Larson, Davin, additional, Livi, Roberto, additional, MacDowall, Robert J., additional, Malaspina, David M., additional, Pulupa, Marc, additional, Stevens, Michael L., additional, Whittlesey, Phyllis, additional, Romoli, Marco, additional, Andretta, Vincenzo, additional, Deppo, Vania Da, additional, Fineschi, Silvano, additional, Heinzel, Petr, additional, Moses, John D., additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Spadaro, Daniele, additional, Stangalini, Marco, additional, Teriaca, Luca, additional, Capobianco, Gerardo, additional, Capuano, Giuseppe E., additional, Casini, Chiara, additional, Casti, Marta, additional, Chioetto, Paolo, additional, Corso, Alain J., additional, Leo, Yara De, additional, Fabi, Michele, additional, Frassati, Federica, additional, Frassetto, Fabio, additional, Giordano, Silvio, additional, Guglielmino, Salvo L., additional, Jerse, Giovanna, additional, Landini, Federico, additional, Liberatore, Alessandro, additional, Magli, Enrico, additional, Massone, Giuseppe, additional, Messerotti, Mauro, additional, Pancrazzi, Maurizio, additional, Pelizzo, Maria G., additional, Romano, Paolo, additional, Sasso, Clementina, additional, Schühle, Udo, additional, Slemer, Alessandra, additional, Straus, Thomas, additional, Uslenghi, Michela, additional, Volpicelli, Cosimo A., additional, Zangrilli, Luca, additional, Zuppella, Paola, additional, Abbo, Lucia, additional, Auchère, Frédéric, additional, Cuadrado, Regina Aznar, additional, Berlicki, Arkadiusz, additional, Ciaravella, Angela, additional, Lamy, Philippe, additional, Lanzafame, Alessandro, additional, Malvezzi, Marco, additional, Nicolosi, Piergiorgio, additional, Nisticò, Giuseppe, additional, Peter, Hardi, additional, Solanki, Sami K., additional, Strachan, Leonard, additional, Tsinganos, Kanaris, additional, Ventura, Rita, additional, Vial, Jean-Claude, additional, Woch, Joachim, additional, and Zimbardo, Gaetano, additional
Published: 2022
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41. Study of a Coronal Mass Ejection with SOHO/UVCS and STEREO data

Author: Susino, Roberto, Bemporad, Alessandro, Dolei, Sergio, and Vourlidas, Angelos
Published: 2013
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42. Linking Small-scale Solar Wind Properties with Large-scale Coronal Source Regions through Joint Parker Solar Probe-Metis/Solar Orbiter Observations

Author: Telloni, Daniele, Zank, Gary P., Sorriso-Valvo, Luca, D'Amicis, Raffaella, Panasenco, Olga, Susino, Roberto, Bruno, Roberto, Perrone, Denise, Adhikari, Laxman, Liang, Haoming, Nakanotani, Masaru, Zhao, Lingling, Hadid, Lina Z., Sanchez-Cano, Beatriz, Verscharen, Daniel, Velli, Marco, Grimani, Catia, Marino, Raffaele, Carbone, Francesco, Mancuso, Salvatore, Biondo, Ruggero, Pagano, Paolo, Reale, Fabio, Bale, Stuart D., Kasper, Justin C., Case, Anthony W., de Wit, Thierry Dudok, Goetz, Keith, Harvey, Peter R., Korreck, Kelly E., Larson, Davin, Livi, Roberto, MacDowall, Robert J., Malaspina, David M., Pulupa, Marc, Stevens, Michael L., Whittlesey, Phyllis, Romoli, Marco, Andretta, Vincenzo, Da Deppo, Vania, Fineschi, Silvano, Heinzel, Petr, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Stangalini, Marco, Teriaca, Luca, Capobianco, Gerardo, Capuano, Giuseppe E., Casini, Chiara, Casti, Marta, Chioetto, Paolo, Corso, Alain J., De Leo, Yara, Fabi, Michele, Frassati, Federica, Frassetto, Fabio, Giordano, Silvio, Guglielmino, Salvo L., Jerse, Giovanna, Landini, Federico, Liberatore, Alessandro, Magli, Enrico, Massone, Giuseppe, Messerotti, Mauro, Pancrazzi, Maurizio, Pelizzo, Maria G., Romano, Paolo, Sasso, Clementina, Schuhle, Udo, Slemer, Alessandra, Straus, Thomas, Uslenghi, Michela, Volpicelli, Cosimo A., Zangrilli, Luca, Zuppella, Paola, Abbo, Lucia, Auchere, Frederic, Cuadrado, Regina Aznar, Berlicki, Arkadiusz, Ciaravella, Angela, Lamy, Philippe, Lanzafame, Alessandro, Malvezzi, Marco, Nicolosi, Piergiorgio, Nistico, Giuseppe, Peter, Hardi, Solanki, Sami K., Strachan, Leonard, Tsinganos, Kanaris, Ventura, Rita, Vial, Jean-Claude, Woch, Joachim, Zimbardo, Gaetano, Telloni, Daniele, Zank, Gary P., Sorriso-Valvo, Luca, D'Amicis, Raffaella, Panasenco, Olga, Susino, Roberto, Bruno, Roberto, Perrone, Denise, Adhikari, Laxman, Liang, Haoming, Nakanotani, Masaru, Zhao, Lingling, Hadid, Lina Z., Sanchez-Cano, Beatriz, Verscharen, Daniel, Velli, Marco, Grimani, Catia, Marino, Raffaele, Carbone, Francesco, Mancuso, Salvatore, Biondo, Ruggero, Pagano, Paolo, Reale, Fabio, Bale, Stuart D., Kasper, Justin C., Case, Anthony W., de Wit, Thierry Dudok, Goetz, Keith, Harvey, Peter R., Korreck, Kelly E., Larson, Davin, Livi, Roberto, MacDowall, Robert J., Malaspina, David M., Pulupa, Marc, Stevens, Michael L., Whittlesey, Phyllis, Romoli, Marco, Andretta, Vincenzo, Da Deppo, Vania, Fineschi, Silvano, Heinzel, Petr, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Stangalini, Marco, Teriaca, Luca, Capobianco, Gerardo, Capuano, Giuseppe E., Casini, Chiara, Casti, Marta, Chioetto, Paolo, Corso, Alain J., De Leo, Yara, Fabi, Michele, Frassati, Federica, Frassetto, Fabio, Giordano, Silvio, Guglielmino, Salvo L., Jerse, Giovanna, Landini, Federico, Liberatore, Alessandro, Magli, Enrico, Massone, Giuseppe, Messerotti, Mauro, Pancrazzi, Maurizio, Pelizzo, Maria G., Romano, Paolo, Sasso, Clementina, Schuhle, Udo, Slemer, Alessandra, Straus, Thomas, Uslenghi, Michela, Volpicelli, Cosimo A., Zangrilli, Luca, Zuppella, Paola, Abbo, Lucia, Auchere, Frederic, Cuadrado, Regina Aznar, Berlicki, Arkadiusz, Ciaravella, Angela, Lamy, Philippe, Lanzafame, Alessandro, Malvezzi, Marco, Nicolosi, Piergiorgio, Nistico, Giuseppe, Peter, Hardi, Solanki, Sami K., Strachan, Leonard, Tsinganos, Kanaris, Ventura, Rita, Vial, Jean-Claude, Woch, Joachim, and Zimbardo, Gaetano
Abstract: The solar wind measured in situ by Parker Solar Probe in the very inner heliosphere is studied in combination with the remote-sensing observation of the coronal source region provided by the METIS coronagraph aboard Solar Orbiter. The coronal outflows observed near the ecliptic by Metis on 2021 January 17 at 16:30 UT, between 3.5 and 6.3 R (circle dot) above the eastern solar limb, can be associated with the streams sampled by PSP at 0.11 and 0.26 au from the Sun, in two time intervals almost 5 days apart. The two plasma flows come from two distinct source regions, characterized by different magnetic field polarity and intensity at the coronal base. It follows that both the global and local properties of the two streams are different. Specifically, the solar wind emanating from the stronger magnetic field region has a lower bulk flux density, as expected, and is in a state of well-developed Alfvenic turbulence, with low intermittency. This is interpreted in terms of slab turbulence in the context of nearly incompressible magnetohydrodynamics. Conversely, the highly intermittent and poorly developed turbulent behavior of the solar wind from the weaker magnetic field region is presumably due to large magnetic deflections most likely attributed to the presence of switchbacks of interchange reconnection origin.
Published: 2022
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43. Observation of a Magnetic Switchback in the Solar Corona

Author: Telloni, Daniele, Zank, Gary P., Stangalini, Marco, Downs, Cooper, Liang, Haoming, Nakanotani, Masaru, Andretta, Vincenzo, Antonucci, Ester, Sorriso-Valvo, Luca, Adhikari, Laxman, Zhao, Lingling, Marino, Raffaele, Susino, Roberto, Grimani, Catia, Fabi, Michele, D'Amicis, Raffaella, Perrone, Denise, Bruno, Roberto, Carbone, Francesco, Mancuso, Salvatore, Romoli, Marco, Da Deppo, Vania, Fineschi, Silvano, Heinzel, Petr, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Teriaca, Luca, Frassati, Federica, Jerse, Giovanna, Landini, Federico, Pancrazzi, Maurizio, Russano, Giuliana, Sasso, Clementina, Biondo, Ruggero, Burtovoi, Aleksandr, Capuano, Giuseppe E., Casini, Chiara, Casti, Marta, Chioetto, Paolo, De Leo, Yara, Giarrusso, Marina, Liberatore, Alessandro, Berghmans, David, Auchere, Frederic, Cuadrado, Regina Aznar, Chitta, Lakshmi P., Harra, Louise, Kraaikamp, Emil, Long, David M., Mandal, Sudip, Parenti, Susanna, Pelouze, Gabriel, Peter, Hardi, Rodriguez, Luciano, Schühle, Udo, Schwanitz, Conrad, Smith, Phil J., Verbeeck, Cis, Zhukov, Andrei N., Telloni, Daniele, Zank, Gary P., Stangalini, Marco, Downs, Cooper, Liang, Haoming, Nakanotani, Masaru, Andretta, Vincenzo, Antonucci, Ester, Sorriso-Valvo, Luca, Adhikari, Laxman, Zhao, Lingling, Marino, Raffaele, Susino, Roberto, Grimani, Catia, Fabi, Michele, D'Amicis, Raffaella, Perrone, Denise, Bruno, Roberto, Carbone, Francesco, Mancuso, Salvatore, Romoli, Marco, Da Deppo, Vania, Fineschi, Silvano, Heinzel, Petr, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Teriaca, Luca, Frassati, Federica, Jerse, Giovanna, Landini, Federico, Pancrazzi, Maurizio, Russano, Giuliana, Sasso, Clementina, Biondo, Ruggero, Burtovoi, Aleksandr, Capuano, Giuseppe E., Casini, Chiara, Casti, Marta, Chioetto, Paolo, De Leo, Yara, Giarrusso, Marina, Liberatore, Alessandro, Berghmans, David, Auchere, Frederic, Cuadrado, Regina Aznar, Chitta, Lakshmi P., Harra, Louise, Kraaikamp, Emil, Long, David M., Mandal, Sudip, Parenti, Susanna, Pelouze, Gabriel, Peter, Hardi, Rodriguez, Luciano, Schühle, Udo, Schwanitz, Conrad, Smith, Phil J., Verbeeck, Cis, and Zhukov, Andrei N.
Abstract: Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by the Parker Solar Probe. The switchbacks' formation mechanism and sources are still unresolved, although candidate mechanisms include Alfvenic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, and geometrical effects related to the Parker spiral. This Letter presents observations from the Metis coronagraph on board a Solar Orbiter of a single large propagating S-shaped vortex, interpreted as the first evidence of a switchback in the solar corona. It originated above an active region with the related loop system bounded by open-field regions to the east and west. Observations, modeling, and theory provide strong arguments in favor of the interchange reconnection origin of switchbacks. Metis measurements suggest that the initiation of the switchback may also be an indicator of the origin of slow solar wind.
Published: 2022
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44. Observation and Modeling of the Solar Wind Turbulence Evolution in the Sub-Mercury Inner Heliosphere

Author: Telloni, Daniele, Adhikari, Laxman, Zank, Gary P., Hadid, Lina Z., Sanchez-Cano, Beatriz, Sorriso-Valvo, Luca, Zhao, Lingling, Panasenco, Olga, Shi, Chen, Velli, Marco, Susino, Roberto, Verscharen, Daniel, Milillo, Anna, Alberti, Tommaso, Narita, Yasuhito, Verdini, Andrea, Grimani, Catia, Bruno, Roberto, D'Amicis, Raffaella, Perrone, Denise, Marino, Raffaele, Carbone, Francesco, Califano, Francesco, Malara, Francesco, Stawarz, Julia E., Laker, Ronan, Liberatore, Alessandro, Bale, Stuart D., Kasper, Justin C., Heyner, Daniel, de Wit, Thierry Dudok, Goetz, Keith, Harvey, Peter R., MacDowall, Robert J., Malaspina, David M., Pulupa, Marc, Case, Anthony W., Korreck, Kelly E., Larson, Davin, Livi, Roberto, Stevens, Michael L., Whittlesey, Phyllis, Auster, Hans-Ulrich, Richter, Ingo, Telloni, Daniele, Adhikari, Laxman, Zank, Gary P., Hadid, Lina Z., Sanchez-Cano, Beatriz, Sorriso-Valvo, Luca, Zhao, Lingling, Panasenco, Olga, Shi, Chen, Velli, Marco, Susino, Roberto, Verscharen, Daniel, Milillo, Anna, Alberti, Tommaso, Narita, Yasuhito, Verdini, Andrea, Grimani, Catia, Bruno, Roberto, D'Amicis, Raffaella, Perrone, Denise, Marino, Raffaele, Carbone, Francesco, Califano, Francesco, Malara, Francesco, Stawarz, Julia E., Laker, Ronan, Liberatore, Alessandro, Bale, Stuart D., Kasper, Justin C., Heyner, Daniel, de Wit, Thierry Dudok, Goetz, Keith, Harvey, Peter R., MacDowall, Robert J., Malaspina, David M., Pulupa, Marc, Case, Anthony W., Korreck, Kelly E., Larson, Davin, Livi, Roberto, Stevens, Michael L., Whittlesey, Phyllis, Auster, Hans-Ulrich, and Richter, Ingo
Abstract: This letter exploits the radial alignment between the Parker Solar Probe and BepiColombo in late 2022 February, when both spacecraft were within Mercury's orbit. This allows the study of the turbulent evolution, namely, the change in spectral and intermittency properties, of the same plasma parcel during its expansion from 0.11 to 0.33 au, a still unexplored region. The observational analysis of the solar wind turbulent features at the two different evolution stages is complemented by a theoretical description based on the turbulence transport model equations for nearly incompressible magnetohydrodynamics. The results provide strong evidence that the solar wind turbulence already undergoes significant evolution at distances less than 0.3 au from the Sun, which can be satisfactorily explained as due to evolving slab fluctuations. This work represents a step forward in understanding the processes that control the transition from weak to strong turbulence in the solar wind and in properly modeling the heliosphere.
Published: 2022
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45. Exploring the Solar Wind from Its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter-Parker Solar Probe Quadrature

Author: Froment, C., Krasnoselskikh, V., Agapitov, O., Fargette, N., Lavraud, B., Larosa, A., Kretzschmar, M., Jagarlamudi, V., Velli, Marco, Malaspina, David, Whittlesey, Phyllis, Bale, Stuart, Case, Anthony, Goetz, Keith, Kasper, Justin, Korreck, Kelly, Larson, Davin, MacDowall, Robert, Mozer, F., Pulupa, Marc, Revillet, C., Stevens, Michael, Telloni, Daniele, Andretta, Vincenzo, Antonucci, Ester, Bemporad, Alessandro, Capuano, Giuseppe, Fineschi, Silvano, Giordano, Silvio, Habbal, Shadia, Perrone, Denise, Pinto, Rui, Sorriso-Valvo, Luca, Spadaro, Daniele, Susino, Roberto, Woodham, Lloyd, Zank, Gary, Romoli, Marco, Auchère, Frédéric, Bruno, Roberto, Capobianco, Gerardo, Casini, Chiara, Casti, Marta, Chioetto, Paolo, Corso, Alain, Da Deppo, Vania, De Leo, Yara, Dudok De Wit, Thierry, Frassati, Federica, Frassetto, Fabio, Guglielmino, Salvo, Harvey, Peter, Heinzel, Petr, Jerse, Giovanna, Landini, Federico, Liberatore, Alessandro, Livi, Roberto, Magli, Enrico, Massone, Giuseppe, Messerotti, Mauro, Moses, John, Naletto, Giampiero, Nicolini, Gianalfredo, Nisticò, Giuseppe, Panasenco, Olga, Pancrazzi, Maurizio, Pelizzo, Maria, Reale, Fabio, Romano, Paolo, Sasso, Clementina, Schühle, Udo, Stangalini, Marco, Strachan, Leonard, Straus, Thomas, Teriaca, Luca, Uslenghi, Michela, Verscharen, Daniel, Volpicelli, Cosimo, Zangrilli, Luca, Zimbardo, Gaetano, Zuppella, Paola, Telloni, Daniele, Andretta, Vincenzo, Antonucci, Ester, Bemporad, Alessandro, Capuano, Giuseppe E., Fineschi, Silvano, Giordano, Silvio, Habbal, Shadia, Perrone, Denise, Pinto, Rui F., Sorriso-Valvo, Luca, Spadaro, Daniele, Susino, Roberto, Woodham, Lloyd D., Zank, Gary P., Romoli, Marco, Bale, Stuart D., Kasper, Justin C., Auchère, Frédéric, Bruno, Roberto, Capobianco, Gerardo, Case, Anthony W., Casini, Chiara, Casti, Marta, Chioetto, Paolo, Corso, Alain J., Da Deppo, Vania, De Leo, Yara, Dudok de Wit, Thierry, Frassati, Federica, Frassetto, Fabio, Goetz, Keith, Guglielmino, Salvo L., Harvey, Peter R., Heinzel, Petr, Jerse, Giovanna, Korreck, Kelly E., Landini, Federico, Larson, Davin, Liberatore, Alessandro, Livi, Roberto, MacDowall, Robert J., Magli, Enrico, Malaspina, David M., Massone, Giuseppe, Messerotti, Mauro, Moses, John D., Naletto, Giampiero, Nicolini, Gianalfredo, Nisticò, Giuseppe, Panasenco, Olga, Pancrazzi, Maurizio, Pelizzo, Maria G., Pulupa, Marc, Reale, Fabio, Romano, Paolo, Sasso, Clementina, Schühle, Udo, Stangalini, Marco, Stevens, Michael L., Strachan, Leonard, Straus, Thoma, Teriaca, Luca, Uslenghi, Michela, Velli, Marco, Verscharen, Daniel, Volpicelli, Cosimo A., Whittlesey, Phylli, Zangrilli, Luca, Zimbardo, Gaetano, Zuppella, Paola, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National d’Études Spatiales [Paris] (CNES), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES)
Subjects: [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Astrophysics::High Energy Astrophysical Phenomena, Solar wind, FOS: Physical sciences, Solar radius, Solar corona, Astrophysics, 01 natural sciences, law.invention, Current sheet, Orbiter, Magnetohydrodynamics, Interplanetary turbulence, Heliosphere, Physics - Space Physics, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], law, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Coronagraph, Solar and Stellar Astrophysics (astro-ph.SR), Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Space plasmas, Astronomy and Astrophysics, Plasma, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Corona, Space Physics (physics.space-ph), [PHYS.PHYS.PHYS-SPACE-PH]Physics [physics]/Physics [physics]/Space Physics [physics.space-ph], Physics - Plasma Physics, Plasma Physics (physics.plasm-ph), Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis, Statistics and Probability [physics.data-an]
Abstract: This Letter addresses the first Solar Orbiter (SO) -- Parker Solar Probe (PSP) quadrature, occurring on January 18, 2021, to investigate the evolution of solar wind from the extended corona to the inner heliosphere. Assuming ballistic propagation, the same plasma volume observed remotely in corona at altitudes between 3.5 and 6.3 solar radii above the solar limb with the Metis coronagraph on SO can be tracked to PSP, orbiting at 0.1 au, thus allowing the local properties of the solar wind to be linked to the coronal source region from where it originated. Thanks to the close approach of PSP to the Sun and the simultaneous Metis observation of the solar corona, the flow-aligned magnetic field and the bulk kinetic energy flux density can be empirically inferred along the coronal current sheet with an unprecedented accuracy, allowing in particular estimation of the Alfv\'en radius at 8.7 solar radii during the time of this event. This is thus the very first study of the same solar wind plasma as it expands from the sub-Alfv\'enic solar corona to just above the Alfv\'en surface., Comment: 10 pages, 4 figures
Published: 2021
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46. Acceleration of Solar Energetic Particles through CME-driven Shock and Streamer Interaction

Author: Frassati, Federica, primary, Laurenza, Monica, additional, Bemporad, Alessandro, additional, West, Matthew J., additional, Mancuso, Salvatore, additional, Susino, Roberto, additional, Alberti, Tommaso, additional, and Romano, Paolo, additional
Published: 2022
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47. Exploring the Solar Wind from Its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter–Parker Solar Probe Quadrature

Author: Telloni, Daniele, primary, Andretta, Vincenzo, additional, Antonucci, Ester, additional, Bemporad, Alessandro, additional, Capuano, Giuseppe E., additional, Fineschi, Silvano, additional, Giordano, Silvio, additional, Habbal, Shadia, additional, Perrone, Denise, additional, Pinto, Rui F., additional, Sorriso-Valvo, Luca, additional, Spadaro, Daniele, additional, Susino, Roberto, additional, Woodham, Lloyd D., additional, Zank, Gary P., additional, Romoli, Marco, additional, Bale, Stuart D., additional, Kasper, Justin C., additional, Auchère, Frédéric, additional, Bruno, Roberto, additional, Capobianco, Gerardo, additional, Case, Anthony W., additional, Casini, Chiara, additional, Casti, Marta, additional, Chioetto, Paolo, additional, Corso, Alain J., additional, Da Deppo, Vania, additional, De Leo, Yara, additional, Dudok de Wit, Thierry, additional, Frassati, Federica, additional, Frassetto, Fabio, additional, Goetz, Keith, additional, Guglielmino, Salvo L., additional, Harvey, Peter R., additional, Heinzel, Petr, additional, Jerse, Giovanna, additional, Korreck, Kelly E., additional, Landini, Federico, additional, Larson, Davin, additional, Liberatore, Alessandro, additional, Livi, Roberto, additional, MacDowall, Robert J., additional, Magli, Enrico, additional, Malaspina, David M., additional, Massone, Giuseppe, additional, Messerotti, Mauro, additional, Moses, John D., additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Nisticò, Giuseppe, additional, Panasenco, Olga, additional, Pancrazzi, Maurizio, additional, Pelizzo, Maria G., additional, Pulupa, Marc, additional, Reale, Fabio, additional, Romano, Paolo, additional, Sasso, Clementina, additional, Schühle, Udo, additional, Stangalini, Marco, additional, Stevens, Michael L., additional, Strachan, Leonard, additional, Straus, Thomas, additional, Teriaca, Luca, additional, Uslenghi, Michela, additional, Velli, Marco, additional, Verscharen, Daniel, additional, Volpicelli, Cosimo A., additional, Whittlesey, Phyllis, additional, Zangrilli, Luca, additional, Zimbardo, Gaetano, additional, and Zuppella, Paola, additional
Published: 2021
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48. Cosmic-ray flux predictions and observations for and with Metis on board Solar Orbiter

Author: Grimani, C., ANDRETTA, Vincenzo, Chioetto, P., V. Da Deppo, Fabi, M., Gissot, S., Naletto, G., Persici, A., Plainaki, C., Romoli, M., Sabbatini, F., SPADARO, Daniele, STANGALINI, MARCO, TELLONI, Daniele, USLENGHI, MICHELA, Antonucci, E., BEMPORAD, Alessandro, CAPOBIANCO, Gerardo, Capuano, G., Casti, M., De Leo, Y., FINESCHI, Silvano, FRASSATI, FEDERICA, Frassetto, F., Heinzel, P., Jerse, G., LANDINI, FEDERICO, Liberatore, A., Magli, E., MESSEROTTI, Mauro, Moses, D., NICOLINI, Gianalfredo, PANCRAZZI, Maurizio, Pelizzo, M. G., ROMANO, Paolo, SASSO, CLEMENTINA, Schühle, U., Slemer, A., STRAUS, Thomas Adolf, SUSINO, ROBERTO, Teriaca, L., VOLPICELLI, Cosimo Antonio, Freiherr von Forstner, J. L., and Zuppella, P.
Subjects: cosmic rays – solar-terrestrial relations – instrumentation: detectors, Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, Physics::Space Physics, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract: 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 the solar corona in both visible light (VL) and ultraviolet (UV). High-energy particles penetrate spacecraft materials and may limit the performance of on-board instruments. A study of galactic cosmic-ray (GCR) tracks observed in the first VL images gathered by Metis during the commissioning phase for a total of 60 seconds of exposure time is presented here. A similar analysis is planned for the UV channel. A prediction of the GCR flux up to hundreds of GeV is made here for the first part of the Solar Orbiter mission to study the Metis coronagraph performance. GCR model predictions are compared to observations gathered on board Solar Orbiter by the EPD/HET experiment in the range 10 MeV-100 MeV in the summer 2020 and with previous measurements. Estimated cosmic-ray fluxes above 70 MeV n$^{-1}$ have been also parameterized and used for Monte Carlo simulations aiming at reproducing the cosmic-ray track observations in the Metis coronagraph VL images. The same parameterizations can also be used to study the performance of other detectors. By comparing observations of cosmic-ray tracks in the Metis VL images with FLUKA Monte Carlo simulations of cosmic-ray interactions in the VL detector, it is found that cosmic rays fire a fraction of the order of 10$^{-4}$ of the whole image pixel sample. Therefore, cosmic rays do not affect sensibly the quality of Metis VL images. It is also found that the overall efficiency for cosmic-ray identification in the Metis VL images is approximately equal to the contribution of Z$>$2 particles. As a result, the Metis coronagraph may play the role of a proton monitor for long-term GCR variations during the overall mission duration., 11 pages, 7 figures, accepted for publication on Astronomy & Astrophysics
Published: 2021
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49. SWELTO - Space Weather Laboratory in Turin Observatory

Author: BEMPORAD, Alessandro, ABBO, Lucia, BARGHINI, Dario, BENNA, Carlo, BIONDO, RUGGERO, BONINO, Donata, CAPOBIANCO, Gerardo, CARELLA, Francesco, CORA, Alberto, FINESCHI, Silvano, FRASSATI, FEDERICA, GARDIOL, Daniele, Giordano, Silvio, LIBERATORE, ALESSANDRO, MANCUSO, Salvatore, MIGNONE, Andrea, RASETTI, Stefania, Reale, Fabio, RIVA, Alberto, SALVATI, Francesco, SUSINO, ROBERTO, VOLPICELLI, Cosimo Antonio, ZANGRILLI, Luca, LOREGGIA, Davide, and BUSONERO, Deborah
Subjects: Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics
Abstract: The SWELTO project is at present entirely supported by the INAF-Turin Astrophysical observatory. The SuperSID monitorwas provided as in kind contribution by University of Stanford, whose support is gratefully acknowledged., SWELTO - Space WEather Laboratory in Turin Observatory is a conceptual framework where new ideas for the analysis of space-based and ground-based data are developed and tested. The input data are (but not limited to) remote sensing observations (EUV images of the solar disk, Visible Light coronagraphic images, radio dynamic spectra, etc...), in situ plasma measurements (interplanetary plasma density, velocity, magnetic field, etc...), as well as measurements acquired by local sensors and detectors (radio antenna, fluxgate magnetometer, full-sky cameras, located in OATo). The output products are automatic identification, tracking, and monitoring of solar stationary and dynamic features near the Sun (coronal holes, active regions, coronal mass ejections, etc...), and in the interplanetary medium (shocks, plasmoids, corotating interaction regions, etc...), as well as reconstructions of the interplanetary medium where solar disturbances may propagate from the Sun to the Earth and beyond. These are based both on empirical models and numerical MHD simulations. The aim of SWELTO is not only to test new data analysis methods for future application for Space Weather monitoring and prediction purposes, but also to procure, test and deploy new ground-based instrumentation to monitor the ionospheric and geomagnetic responses to solar activity. Moreover, people involved in SWELTO are active in outreach to disseminate the topics related with Space Weather to students and the general public.
Published: 2021
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50. SWIFF: Space weather integrated forecasting framework

Author: Frederiksen Jacob Trier, Nordlund Åke, Restante Anna Lisa, Olshevsky Vyacheslav, Faganello Matteo, Pegoraro Francesco, Califano Francesco, Henri Pierre, Trávníček Pavel M., Šebek Ondřej, Poedts Stefaan, Markidis Stefano, Keppens Rony, Pierrard Viviane, Lapenta Giovanni, Mackay Duncan H., Parnell Clare E., Bemporad Alessandro, Susino Roberto, and Borremans Kris
Subjects: space weather, modelling, high performance computing, Meteorology. Climatology, QC851-999
Abstract: SWIFF is a project funded by the Seventh Framework Programme of the European Commission to study the mathematical-physics models that form the basis for space weather forecasting. The phenomena of space weather span a tremendous scale of densities and temperature with scales ranging 10 orders of magnitude in space and time. Additionally even in local regions there are concurrent processes developing at the electron, ion and global scales strongly interacting with each other. The fundamental challenge in modelling space weather is the need to address multiple physics and multiple scales. Here we present our approach to take existing expertise in fluid and kinetic models to produce an integrated mathematical approach and software infrastructure that allows fluid and kinetic processes to be modelled together. SWIFF aims also at using this new infrastructure to model specific coupled processes at the Solar Corona, in the interplanetary space and in the interaction at the Earth magnetosphere.
Published: 2013
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