A5103138693- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Solar Radiation and Photovoltaics
- Geomagnetism and Paleomagnetism Studies
- Adaptive optics and wavefront sensing
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- Astronomy and Astrophysical Research
- Robot Manipulation and Learning
- Optical Polarization and Ellipsometry
- Teleoperation and Haptic Systems
- Earthquake Detection and Analysis
- Astronomical Observations and Instrumentation
- Geological and Geophysical Studies
- CCD and CMOS Imaging Sensors
- History and Developments in Astronomy
- Impact of Light on Environment and Health
- Complex Systems and Time Series Analysis
- Calibration and Measurement Techniques
- Astrophysics and Cosmic Phenomena
- Robotic Mechanisms and Dynamics
- Geophysics and Gravity Measurements
- Distributed and Parallel Computing Systems
- Spectroscopy and Laser Applications
Astronomical Observatory of Rome
2014-2025
National Institute for Astrophysics
2014-2024
National Institute of Optics
2018
Graal Tech
2004
University of Genoa
2004
The European Solar Telescope (EST) is a project aimed at studying the magnetic connectivity of solar atmosphere, from deep photosphere to upper chromosphere. Its design combines knowledge and expertise gathered by physics community during construction operation state-of-the-art telescopes operating in visible near-infrared wavelengths: Swedish 1m (SST), German Vacuum Tower (VTT) GREGOR, French T\'elescope H\'eliographique pour l'\'Etude du Magn\'etisme et des Instabilit\'es Solaires...
Aims.We have analyzed the contrast of facular features identified in a large dataset PSPT full-disk photometric images and SoHO/MDI magnetograms, obtained from 1998 to 2005. The aim this work is contribute improvement semi-empirical atmospheric models irradiance studies understand reasons for controversial results already presented literature.
We reassess the relationship between photospheric magnetic field strength and Ca II K intensity for a variety of surface features as function position on disc solar activity level. This can be used to recover unsigned from images recorded in core line. have analysed 131 pairs high-quality, full-disc, near-co-temporal observations SDO/HMI Rome/PSPT spanning half cycle. To analytically describe observationally-determined relation, we considered three different functions: power law with an...
Although theoretically predicted, the simultaneous excitation of several resonant modes in sunspots has not been observed. Like any harmonic oscillator, a solar magnetic flux tube can support variety resonances, which constitute natural response system to external forcing. Apart from few single low order eigenmodes small scale structures, were found extremely large sunspots. Here we report detection largest-scale coherent oscillations observed sunspot, with spectrum significantly different...
Context. Full-disc observations of the Sun in H α line provide information about solar chromosphere, and particular, filaments, which are dark elongated features that lie along magnetic field polarity-inversion lines. This makes them important for studies magnetism. Because full-disc have been performed at various sites since second half 19th century, with regular photographic data having started beginning 20th they an invaluable source on past Aims. We derive accurate filaments from...
Bipolar emerging flux regions (EFRs) form active (ARs) that generally evolve into a pre-existing magnetic environment in the solar atmosphere. Reconfiguration of small- and large-scale connectivities is invoked to explain plethora energy-release phenomena observed at sites EFRs. These include brightening events, surges, jets, whose triggers relationships are still unclear. In this context, we study formation proto-spot AR NOAA 11462 by analyzing spectropolarimetric spectroscopic measurements...
The formation of shocks within the solar atmosphere remains one few observable signatures energy dissipation arising from plethora magnetohydrodynamic waves generated close to surface. Active region observations offer exceptional views wave behavior and its impact on surrounding atmosphere. stratified plasma gradients present in lower allow for potential many theorized shock phenomena. In this study, using chromospheric Ca II 854.2nm spectropolarimetric data a large sunspot, we examine...
Abstract Since volcanic activity was first discovered on Io from Voyager images in 1979, changes Io's surface have been monitored both spacecraft and ground‐based telescopes. Here, we present the highest spatial resolution of ever obtained a telescope. These images, acquired by SHARK‐VIS instrument Large Binocular Telescope, show evidence major resurfacing event trailing hemisphere. When compared to most recent that plume deposit powerful eruption at Pillan Patera has covered part long‐lived...
Total solar irradiance (TSI) has been monitored from space since 1978, i.e. for about four cycles. The measurements show a prominent variability in phase with the cycle, as well fluctuations on timescales shorter than few days. However, were done by multiple and usually relatively short-lived missions. different absolute calibrations of individual instruments unaccounted instrumental trends make estimates possible long-term trend TSI highly uncertain. Furthermore, both uncertainty are...
<i>Context. <i/>The increasing interest in the recovery of historic data and availability new hardware resources is leading to projects digitize photographic archives astronomical observations. In addition preservation, solar are digitized because observations stored such have potential providing unique information about magnetism, which can improve knowledge long-term changes.<i>Aims. tower Arcetri Astrophysical Observatory produced synoptic atmosphere from 1926 1974. The archive contains...
Abstract We analyzed state-of-the-art observations of the solar atmosphere to investigate dependence Ca ii K brightness several features on spectral bandwidth and spatial resolution data. In particular, we study data obtained at Swedish Solar Telescope with Crisp Imaging Spectropolarimeter Chromospheric Spectrometer instruments. The data, which are characterized by a 0.12 Å 0.″078, were acquired close disk center targeting quiet-Sun area an active region. convolved original Gaussian kernels...
Abstract Angelo Secchi, an Italian Jesuit and prominent scientist of the 19th century, one founders modern astrophysics, observed Sun regularly at Collegio Romano in Rome, Italy, for more than 25 yr. Results from his observations are reported articles published scientific journals time, as well drawings personal notebooks that stored historical archive Istituto Nazionale di Astrofisica Osservatorio Astronomico Roma. The latter material, which reports solar performed 1853–1878, includes...
Abstract We studied the physical parameters of penumbra in a large and fully developed sunspot, one largest over last two solar cycles, by using full-Stokes measurements taken at photospheric Fe i 617.3 nm chromospheric Ca ii 854.2 lines with Interferometric Bidimensional Spectrometer. Inverting Non-LTE inversion COde (NICOLE) code, we obtained three-dimensional structure magnetic field from bottom photosphere up to middle chromosphere. analyzed azimuthal vertical gradient strength...
Vortex structures in the Sun's chromosphere are believed to channel energy between different layers of solar atmosphere. We investigate nature and dynamics two small-scale quiet-Sun rotating chromosphere. analyse chromospheric that show clear rotational patterns spectropolarimetric observations taken with Interferometric Bidimensional Spectrometer (IBIS) at Ca II 8542 \AA~ line. present detection signals manifest magnetic Our long-lived plasma each rotate clockwise inside a 10 arcsec$^{2}$~...
We study the radiative emission of various types solar features, such as quiet Sun, enhanced network, plage, and bright plage regions, identified on filtergrams taken in Ca II K line. analysed fulldisk images obtained with PSPT, by using three interference filters that sample line different bandpasses. studied dependence disk features filter bandpass. also performed a NLTE spectral synthesis integrated over bandpass PSPT filters. The was carried out utilizing both PRD CRD most recent set...
Moving magnetic features (MMFs) are small-size elements that seen to stream out from sunspots, generally during their decay phase. Several observational results presented in the literature suggest them be closely related filaments extend penumbra of parent spot. Nevertheless, few observations MMFs streaming spots without have been reported. The still lacks analyses physical properties these features. We investigate monopolar observed around a small pore had developed days preceding our and...
We present results derived from the analysis of spectropolarimetric measurements active region AR12546, which represents one largest sunspots to have emerged onto solar surface over last $20$ years. The was observed with full-Stokes scans Fe I 617.3 nm and Ca II 854.2 lines Interferometric BIdimensional Spectrometer (IBIS) instrument at Dunn Solar Telescope an uncommon, extremely long time interval exceeding three hours. Clear circular polarization (CP) oscillations localized umbra-penumbra...
The Rome Precision Solar Photometric Telescope (Rome/PSPT) is a ground-based telescope engaged in precision solar photometry. It has 27-year database of full-disk images the photosphere and chromosphere beginning 1996 continuing to 2022. have been obtained daily, weather permitting, with approximately 2 arcsec/pixel scale Ca II K line at 393.3 nm, G-band 430.6 continuum blue red parts spectrum 409.4 nm 607.2 respectively. Regular observations were also performed green 535.7 for period about...
The instrumental advances made in this new era of 4-meter class solar telescopes with unmatched spectropolarimetric accuracy and sensitivity, will enable the study chromospheric magnetic fields their dynamics unprecedented detail. In regard, diagnostics can provide invaluable insight into magneto-hydrodynamic (MHD) wave processes. MHD waves and, particular, Alfv\'enic fluctuations associated to particular modes, were recently recognized as important mechanisms not only for heating outer...
The IBIS data Archive (IBIS-A) stores acquired with the Interferometric BIdimensional Spectropolarimeter (IBIS), which was operated at Dunn Solar Telescope of US National Observatory from 2003 to 2019. instrument provided series high-resolution narrowband spectropolarimetric imaging observations photosphere and chromosphere in range 5800$-$8600 \AA~ co-temporal broadband same spectral field view polarimetric data. We present currently stored IBIS-A, as well interface utilized explore such...