Search

Your search keyword '"ABBO, Lucia"' showing total 38 results
Start Over Author "ABBO, Lucia"

Refine your results

more »

more »

more »
38 results on '"ABBO, Lucia"'

1. 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
Full Text
View/download PDF

2. 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

3. 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
Full Text
View/download PDF

4. 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
Full Text
View/download PDF

5. Coronal Pseudo-Streamer and Bipolar Streamer Observed by SOHO/UVCS in March 2008

Author

Abbo, Lucia, Lionello, Roberto, Riley, Pete, and Wang, Yi-Ming

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

The last solar minimum is characterized by several peculiar aspects and by the presence of a complex magnetic topology with two different kinds of coronal streamers: pseudo-streamers and bipolar streamers. Pseudo-streamers or unipolar streamer are coronal structures which separate coronal holes of the same polarity, without a current sheet in the outer corona; unlike bipolar streamer that separate coronal holes of opposite magnetic polarity. In this study, two examples of these structures have been identified in the period of Carrington rotation 2067, by applying a potential-field source-surface extrapolation of the photospheric field measurements. We present a spectroscopic analysis of a pseudo-streamer and a bipolar streamer observed in the period 12-17 March 2008 at high spectral and spatial resolution by the Ultraviolet Coronagraph Spectrometer (UVCS; Kohl et al., 1995) onboard Solar and Heliospheric Observatory (SOHO). The solar wind plasma parameters, such as kinetic temperature, electron density and outflow velocity, are inferred in the extended corona (from 1.7 to 2.1 Rsun) analysing the O VI doublet and Ly alpha line spectra. The coronal magnetic topology is taken into account and has been extrapolated by a 3D magneto-hydrodynamic model of the global corona. The results of the analysis show some peculiarities of the pseudo-streamer physical parameters in comparison with those obtained for bipolar streamers: in particular, we have found higher kinetic temperature and higher outflow velocities of O VI ions and lower electron density values. In conclusion, we point out that pseudo-streamers produce a "hybrid" type of outflow that is intermediate between slow and fast solar wind and they are a possible source of slow/fast wind in not dipolar solar magnetic field configuration., Comment: 14 pages, 8 figures, in press in Solar Physics, 2015

Published
2015
Full Text
View/download PDF

6. Global helium abundance measurements in the solar corona

Author

Moses, John D., Antonucci, Ester, Newmark, Jeffrey, Auchère, Frédéric, Fineschi, Silvano, Romoli, Marco, Telloni, Daniele, Massone, Giuseppe, Zangrilli, Luca, Focardi, Mauro, Landini, Federico, Pancrazzi, Maurizio, Rossi, Guglielmo, Malvezzi, Andrea M., Wang, Dennis, Leclec’h, Jean-Christophe, Moalic, Jean-Pierre, Rouesnel, Frédéric, Abbo, Lucia, Canou, Aurélien, Barbey, Nicolas, Guennou, Chloé, Laming, John M., Lemen, James, Wuelser, Jean-Pierre, Kohl, John L., and Gardner, Lawrence D.

Published
2020
Full Text
View/download PDF

7. Observations and models of slow solar wind with Mg9+ ions in quiescent streamers

Author

Ofman, Leon, Abbo, Lucia, and Giordano, Silvio

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

Quiescent streamers are characterized by a peculiar UV signature as pointed out by the results from the observations of the Ultraviolet and Coronograph Spectrometer (UVCS) on board SOHO: the intensity of heavy ion emission lines (such as OVI) show dimmer core relative to the edges. Previous models show that the structure of the heavy ion streamer emission relates to the acceleration regions of the slow solar wind at streamer legs and to gravitational settling processes in the streamer core. Observations of Mg9+ ion EUV emission in coronal streamers at solar minimum were first reported by the UVCS instrument. The Mg X 625A emission is an order of magnitude smaller than the OVI 1032A emission, requiring longer exposures to obtain statistically significant results. Here, MgX coronal observations are analyzed and compared, for the first time, with the solar minimum streamer structure in hydrogen and OVI emissions. We employ the 2.5D three-fluid model, developed previously to study the properties of O5+ ions in streamers, and calculate for the first time the density, temperature, and outflow structure of Mg9+ ions in the solar minimum streamer. The Mg9+ ions are heated by an empirical radial heating function constrained by observations of the kinetic ion temperature obtained from MgX emission line profiles. The detailed structure of Mg9+ density, temperature, and outflow speed determined by the Coulomb momentum and energy exchange as well as electromagnetic interactions with electrons and protons in the three-fluid model of the streamer. The results of the model are in good qualitative agreement with observations, and provide insights on the possible link between the magnetic structure of the streamer, slow solar wind sources, and relative abundances of heavy ions., Comment: Accepted for publication in the Astrophysical Journal

Published
2012
Full Text
View/download PDF

8. Design of a circular slit spectrometer

Author

Navarro, Ramón, Jedamzik, Ralf, Landini, Federico, Frassetto, Fabio, Caracci, Valeria, Cocola, Lorenzo, Abbo, Lucia, Andretta, Vincenzo, Casini, Chiara, Riva, Alberto, Fineschi, Silvano, Pancrazzi, Maurizio, Romoli, Marco, and Zuppella, Paola

Published
2024
Full Text
View/download PDF

9. Polarimetric characterization of the coronal diagnostic experiment (CODEX)

Author

Coyle, Laura E., Matsuura, Shuji, Perrin, Marshall D., Casti, Marta, Newmark, Jeffrey S., Kim, Yeon-Han, Capobianco, Gerardo, Haudemand, Hervé, Song, Donguk, Park, Sung-Hong, Bong, Su-Chan, Cho, Kyungsuk, Choi, Seonghwan, Gong, Qian, Baek, Ji-Hye, Park, Jongyeob, Kim, Jihun, Yang, Heesu, Reginald, Nelson L., Viall, Nicholeen M., Fineschi, Silvano, Landini, Federico, Loreggia, Davide, Zangrilli, Luca, Abbo, Lucia, and Budinoff, Jason

Published
2024
Full Text
View/download PDF

10. CODEX optical design and alignment

Author

Coyle, Laura E., Matsuura, Shuji, Perrin, Marshall D., Gong, Qian, Newmark, Jeffrey S., Kim, Yeon-Han, Casti, Marta, Abbo, Lucia, Baek, Ji-Hye, Bong, Su-Chan, Budinoff, Jason, Capobianco, Gerado, Cho, Kyungsuk, Choi, Seonghwan, Fineschi, Silvano, Haudemand, Hervé, Kim, Jihun, Landini, Federico, Loreggia, Davide, Park, Sung-Hong, Park, Jongyeob, Reginald, Nelson L., Song, Donguk, Yang, Heesu, and Zangrilli, Luca

Published
2024
Full Text
View/download PDF

11. Formation of the current sheet in a coronal streamer

Author

Abbo, Lucia, Antonucci, Ester, Lionello, Roberto, Mikić, Zoran, and Riley, Pete

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

The present work is on the study of a coronal streamer observed in March 2008 at high spectral and spatial resolution by the Ultraviolet Coronagraph Spectrometer (UVCS) onboard SOHO. On the basis of a spectroscopic analysis of the O VI doublet, the solar wind plasma parameters are inferred in the extended corona. The analysis accounts for the coronal magnetic topology, extrapolated through a 3D magneto-hydrodynamic model. The results of the analysis show indications on the formation of the current sheet, one of the source regions of the slow coronal wind., Comment: 6 pages, 3 figures, Proceeding of the "International Association of Geomagnetism and Aeronomy (IAGA) 2nd Symposium: Solar Wind - Space Environment Interaction", December 4th-8th, 2009, Cairo, Egypt

Published
2011
Full Text
View/download PDF

12. Characterization of the slow wind in the outer corona

Author

Abbo, Lucia, Antonucci, Ester, Mikić, Zoran, Linker, Jon A., Riley, Pete, and Lionello, Roberto

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

The study concerns the streamer belt observed at high spectral resolution during the minimum of solar cycle 22 with the Ultraviolet Coronagraph Spectrometer (UVCS) onboard SOHO. On the basis of a spectroscopic analysis of the O VI doublet, the solar wind plasma parameters are inferred in the extended corona. The analysis accounts for the coronal magnetic topology, extrapolated through a 3D magneto-hydrodynamic model, in order to define the streamer boundary and to analyse the edges of coronal holes. The results of the analysis allow an accurate identification of the source regions of the slow coronal wind that are confirmed to be along the streamer boundary in the open magnetic field region., Comment: 5 figures, work presented with an oral presentation on 37th COSPAR Scientific Assembly, 13 - 20 July 2008, Montreal, Canada

Published
2010
Full Text
View/download PDF

13. 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
Full Text
View/download PDF

14. 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
Full Text
View/download PDF

15. 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
Full Text
View/download PDF

16. 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
Full Text
View/download PDF

17. Beyond the disk: EUV coronagraphic observations of the Extreme Ultraviolet Imager on board Solar Orbiter

Author

Auchère, Frédéric, Berghmans, David, Dumesnil, Cydalise, Halain, Jean P., Mercier, Raymond, Rochus, Pierre, Delmotte, Franck, François, Serge, Hermans, Aline, Hervier, Véronique, Kraaikamp, Emil, Meltchakov, Evgueni, Morinaud, Gilles, Philippon, Anne, Smith, Phil J., Stegen, Koen, Verbeeck, Cis, Zhang, Xueyan, Andretta, Vincenzo, Abbo, Lucia, and Harra, Louise

Subjects
conduction, Sun: corona, Sun: coronal mass ejections (CMEs), corona, Sun: UV radiation, conduction [Sun]
Abstract

Context. Most observations of the solar corona beyond 2 R consist of broadband visible light imagery carried out with coronagraphs. The associated diagnostics mainly consist of kinematics and derivations of the electron number density. While the measurement of the properties of emission lines can provide crucial additional diagnostics of the coronal plasma (temperatures, velocities, abundances, etc.), these types of observations are comparatively rare. In visible wavelengths, observations at these heights are limited to total eclipses. In the ultraviolet (UV) to extreme UV (EUV) range, very few additional observations have been achieved since the pioneering results of the Ultraviolet Coronagraph Spectrometer (UVCS). Aims. One of the objectives of the Full Sun Imager (FSI) channel of the Extreme Ultraviolet Imager (EUI) on board the Solar Orbiter mission has been to provide very wide field-of-view EUV diagnostics of the morphology and dynamics of the solar atmosphere in temperature regimes that are typical of the lower transition region and of the corona. Methods. FSI carries out observations in two narrowbands of the EUV spectrum centered on 17.4 nm and 30.4 nm that are dominated, respectively, by lines of FeIX/X (formed in the corona around 1 MK) and by the resonance line of HeII (formed around 80 kK in the lower transition region). Unlike previous EUV imagers, FSI includes a moveable occulting disk that can be inserted in the optical path to reduce the amount of instrumental stray light to a minimum. Results. FSI detects signals at 17.4 nm up to the edge of its field of view (7 R), which is about twice further than was previously possible. Operation at 30.4 nm are for the moment compromised by an as-yet unidentified source of stray light. Comparisons with observations by the LASCO and Metis coronagraphs confirm the presence of morphological similarities and differences between the broadband visible light and EUV emissions, as documented on the basis of prior eclipse and space-based observations. Conclusions. The very-wide-field observations of FSI out to about 3 and 7 R, without and with the occulting disk, respectively, are paving the way for future dedicated instruments., Astronomy & Astrophysics, 674, ISSN:0004-6361, ISSN:1432-0746

Published
2023
Full Text
View/download PDF

18. 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
Full Text
View/download PDF

19. 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
Full Text
View/download PDF

20. 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
Full Text
View/download PDF

24. Metis: the Solar Orbiter visible light and ultraviolet coronal imager

Author

Antonucci, Ester, primary, Romoli, Marco, additional, Andretta, Vincenzo, additional, Fineschi, Silvano, additional, Heinzel, Petr, additional, Moses, J. Daniel, additional, Naletto, Giampiero, additional, Nicolini, Gianalfredo, additional, Spadaro, Daniele, additional, Teriaca, Luca, additional, Berlicki, Arkadiusz, additional, Capobianco, Gerardo, additional, Crescenzio, Giuseppe, additional, Da Deppo, Vania, additional, Focardi, Mauro, additional, Frassetto, Fabio, additional, Heerlein, Klaus, additional, Landini, Federico, additional, Magli, Enrico, additional, Marco Malvezzi, Andrea, additional, Massone, Giuseppe, additional, Melich, Radek, additional, Nicolosi, Piergiorgio, additional, Noci, Giancarlo, additional, Pancrazzi, Maurizio, additional, Pelizzo, Maria G., additional, Poletto, Luca, additional, Sasso, Clementina, additional, Schühle, Udo, additional, Solanki, Sami K., additional, Strachan, Leonard, additional, Susino, Roberto, additional, Tondello, Giuseppe, additional, Uslenghi, Michela, additional, Woch, Joachim, additional, Abbo, Lucia, additional, Bemporad, Alessandro, additional, Casti, Marta, additional, Dolei, Sergio, additional, Grimani, Catia, additional, Messerotti, Mauro, additional, Ricci, Marco, additional, Straus, Thomas, additional, Telloni, Daniele, additional, Zuppella, Paola, additional, Auchère, Frederic, additional, Bruno, Roberto, additional, Ciaravella, Angela, additional, Corso, Alain J., additional, Alvarez Copano, Miguel, additional, Aznar Cuadrado, Regina, additional, D’Amicis, Raffaella, additional, Enge, Reiner, additional, Gravina, Alessio, additional, Jejčič, Sonja, additional, Lamy, Philippe, additional, Lanzafame, Alessandro, additional, Meierdierks, Thimo, additional, Papagiannaki, Ioanna, additional, Peter, Hardi, additional, Fernandez Rico, German, additional, Giday Sertsu, Mewael, additional, Staub, Jan, additional, Tsinganos, Kanaris, additional, Velli, Marco, additional, Ventura, Rita, additional, Verroi, Enrico, additional, Vial, Jean-Claude, additional, Vives, Sebastien, additional, Volpicelli, Antonio, additional, Werner, Stephan, additional, Zerr, Andreas, additional, Negri, Barbara, additional, Castronuovo, Marco, additional, Gabrielli, Alessandro, additional, Bertacin, Roberto, additional, Carpentiero, Rita, additional, Natalucci, Silvia, additional, Marliani, Filippo, additional, Cesa, Marco, additional, Laget, Philippe, additional, Morea, Danilo, additional, Pieraccini, Stefano, additional, Radaelli, Paolo, additional, Sandri, Paolo, additional, Sarra, Paolo, additional, Cesare, Stefano, additional, Del Forno, Felice, additional, Massa, Ernesto, additional, Montabone, Mauro, additional, Mottini, Sergio, additional, Quattropani, Daniele, additional, Schillaci, Tiziano, additional, Boccardo, Roberto, additional, Brando, Rosario, additional, Pandi, Arianna, additional, Baietto, Cristian, additional, Bertone, Riccardo, additional, Alvarez-Herrero, Alberto, additional, García Parejo, Pilar, additional, Cebollero, María, additional, Amoruso, Mauro, additional, and Centonze, Vito, additional

Published
2020
Full Text
View/download PDF

25. In flight stray light estimate for the Solar Orbiter/Metis coronagraph.

Author

Landini, Federico, Romoli, Marco, Nicolini, Gianalfredo, Frassetto, Fabio, Susino, Roberto, Abbo, Lucia, Andretta, Vincenzo, Burtovoi, Aleksandr, Casini, Chiara, Chioetto, Paolo, Corso, Alain J., Da Deppo, Vania, De Leo, Yara, Fabi, Michele, Fineschi, Silvano, Frassati, Federica, Grimani, Catia, Heinzel, Petr, Jerse, Giovanna, and Liberatore, Alessandro

Published
2024
Full Text
View/download PDF

27. Spectroscopic signature of Alfv\'en waves damping in a polar coronal hole up to 0.4 solar radii

Author

Abbo Lucia and Bemporad Alessandro

Subjects
Physics, Electron density, Energy flux, Coronal hole, Order (ring theory), Astronomy and Astrophysics, Solar radius, Astrophysics, Spectral line, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics, Energy (signal processing), Line (formation)
Abstract

Between February 24-25, 2009, the EIS spectrometer onboard the Hinode spacecraft performed special "sit & stare" observations above the South polar coronal hole continuously over more than 22 hours. Spectra were acquired with the 1" slit placed off-limb covering altitudes up to 0.48 R$_\odot$ ($3.34\times 10^2$ Mm) above the Sun surface, in order to study with EIS the non-thermal spectral line broadenings. Spectral lines such as Fe {\sc xii} $\lambda$186.88, Fe {\sc xii} $\lambda$193.51, Fe {\sc xii} $\lambda$195.12 and Fe {\sc xiii} $\lambda$202.04 are observed with good statistics up to high altitudes and they have been analyzed in this study. Results show that the FWHM of Fe {\sc xii} $\lambda$195.12 line increases up to $\simeq 0.14$ R$_\odot$, then decreases higher up. EIS stray light has been estimated and removed. Derived electron density and non-thermal velocity profiles have been used to estimate the total energy flux transported by Alfv\'en waves off-limb in polar coronal hole up to $\simeq 0.4$ R$_\odot$. The computed Alfv\'en wave energy flux density $f_w$ progressively decays with altitude from $f_w \simeq 1.2 \cdot 10^6$ erg cm$^{-2}$ s$^{-1}$ at 0.03 R$_\odot$ down to $f_w \simeq 8.5 \cdot 10^3$ erg cm$^{-2}$ s$^{-1}$ at 0.4 R$_\odot$, with an average energy decay rate $\Delta f_w / \Delta h \simeq -4.5 \cdot 10^{-5}$ erg cm$^{-3}$ s$^{-1}$. Hence, this result suggests energy deposition by Alfv\'en waves in a polar coronal hole, thus providing a significant source for coronal heating., Comment: Physical units of the Alfv\'en wave Energy Decay Rate $\Delta f_w / \Delta h$ revised with respect to the published version. Scientific results and conclusions unchanged

Published
2012

29. In flight stray light estimate for the Solar Orbiter/Metis coronagraph

Author

Minoglou, Kyriaki, Karafolas, Nikos, Cugny, Bruno, Landini, Federico, Romoli, Marco, Nicolini, Gianalfredo, Frassetto, Fabio, Susino, Roberto, Abbo, Lucia, Andretta, Vincenzo, Burtovoi, Aleksandr, Casini, Chiara, Chioetto, Paolo, Corso, Alain J., Da Deppo, Vania, De Leo, Yara, Fabi, Michele, Fineschi, Silvano, Frassati, Federica, Grimani, Catia, Heinzel, Petr, Jerse, Giovanna, Liberatore, Alessandro, Naletto, Giampiero, Pancrazzi, Maurizio, Russano, Giuliana, Sasso, Clementina, Spadaro, Daniele, Stangalini, Marco, Telloni, Daniele, Teriaca, Luca, Uslenghi, Michela, Volpicelli, Cosimo, and Zuppella, Paola

Published
2023
Full Text
View/download PDF

30. Out-of-focus point sources image simulation for the Metis solar coronagraph onboard the Solar Orbiter mission

Author

Minoglou, Kyriaki, Karafolas, Nikos, Cugny, Bruno, Da Deppo, Vania, Casini, Chiara, Chioetto, Paolo, Frassetto, Fabio, Nordera, Simone, Zuppella, Paola, Corso, Alain, Landini, Federico, Pancrazzi, Maurizio, Susino, Roberto, Sasso, Clementina, Uslenghi, Michela, Romoli, Marco, Andretta, Vincenzo, Fineschi, Silvano, Naletto, Giampiero, Nicolini, Gianalfredo, Spadaro, Daniele, Stangalini, Marco, Teriaca, Luca, Abbo, Lucia, Grimani, Catia, Burtovoi, Aleksandr, De Leo, Yara, Fabi, Michele, Frassati, Federica, Jerse, Giovanna, and Russano, Giuliana

Published
2023
Full Text
View/download PDF

32. METIS: a novel coronagraph design for the Solar Orbiter mission

Author

Fineschi, Silvano, primary, Antonucci, Ester, additional, Naletto, Giampiero, additional, Romoli, Marco, additional, Spadaro, Daniele, additional, Nicolini, Gianalfredo, additional, Abbo, Lucia, additional, Andretta, Vincenzo, additional, Bemporad, Alessandro, additional, Berlicki, Arkadiusz, additional, Capobianco, Gerardo, additional, Crescenzio, Giuseppe, additional, Da Deppo, Vania, additional, Focardi, Mauro, additional, Landini, Federico, additional, Massone, Giuseppe, additional, Malvezzi, Marco A., additional, Moses, J. Dan, additional, Nicolosi, Piergiorgio, additional, Pancrazzi, Maurizio, additional, Pelizzo, Maria-Guglielmina, additional, Poletto, Luca, additional, Schühle, Udo H., additional, Solanki, Sami K., additional, Telloni, Daniele, additional, Teriaca, Luca, additional, and Uslenghi, Michela, additional

Published
2012
Full Text
View/download PDF

33. Multi Element Telescope for Imaging and Spectroscopy (METIS) coronagraph for the Solar Orbiter mission

Author

Antonucci, Ester, primary, Fineschi, Silvano, additional, Naletto, Giampiero, additional, Romoli, Marco, additional, Spadaro, Daniele, additional, Nicolini, Gianalfredo, additional, Nicolosi, Piergiorgio, additional, Abbo, Lucia, additional, Andretta, Vincenzo, additional, Bemporad, Alessandro, additional, Auchère, Frédéric, additional, Berlicki, Arkadiusz, additional, Bruno, Roberto, additional, Capobianco, Gerardo, additional, Ciaravella, Angela, additional, Crescenzio, Giuseppe, additional, Da Deppo, Vania, additional, D'Amicis, Raffaella, additional, Focardi, Mauro, additional, Frassetto, Fabio, additional, Heinzel, Peter, additional, Lamy, Philippe L., additional, Landini, Federico, additional, Massone, Giuseppe, additional, Malvezzi, Marco A., additional, Moses, J. Dan, additional, Pancrazzi, Maurizio, additional, Pelizzo, Maria-Guglielmina, additional, Poletto, Luca, additional, Schühle, Udo H., additional, Solanki, Sami K., additional, Telloni, Daniele, additional, Teriaca, Luca, additional, and Uslenghi, Michela, additional

Published
2012
Full Text
View/download PDF

37. Streamers study at solar minimum: combination of UV observations and numerical modeling.

Author

Abbo, Lucia, Ofman, Leon, and Giordano, Silvio

Subjects
*SOLAR activity, *NUMERICAL analysis, *SOLAR corona, *SOLAR radiation, *SOLAR active regions
Abstract

The present study concerns a comparison between the slow solar wind plasma parameters obtained in the extended corona by the UV spectroscopic data from the Ultraviolet Coronagraph Spectrometer (UVCS) onboard SOHO during the minimum of solar activity (1996) and the results of a time-dependent 2.5 D three-fluid MHD model of coronal streamer belt. The aim of the study is to improve the knowledge of the slow solar wind acceleration mechanism and the origin of its variability. [ABSTRACT FROM AUTHOR]

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results