Browsing Institutt for teoretisk astrofysikk by Author "Guglielmino, S. L."

Now showing items 1-7 of 7

  • Analysis of Pseudo-Lyapunov Exponents of Solar Convection Using State-of-the-Art Observations 
    Viavattene, Giorgio; Murabito, M.; Guglielmino, S. L.; Ermolli, I.; Consolini, G.; Giorgi, F.; Jafarzadeh, Shahin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The solar photosphere and the outer layer of the Sun’s interior are characterized by convective motions, which display a chaotic and turbulent character. In this work, we evaluated the pseudo-Lyapunov exponents of the ...
  • Dynamic properties along the neutral line of a delta spot inferred from high-resolution observations 
    Cristaldi, A.; Guglielmino, S. L.; Zuccarello, F.; Romano, P.; Falco, M.; Rouppe, Van Der Voort Luc; de la Cruz Rodriguez, Jaime; Ermolli, I.; Criscuoli, S. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    Delta (δ) spots are complex magnetic configurations of sunspots characterized by umbrae of opposite polarity sharing a common penumbra. In order to investigate the fine structure of the region separating the two magnetic ...
  • Height Dependence of the Penumbral Fine-scale Structure in the Inner Solar Atmosphere 
    Murabito, M.; Ermolli, I.; Giorgi, F.; Stangalini, M.; Guglielmino, S. L.; Jafarzadeh, Shahin; Socas-Navarro, H.; Romano, P.; Zuccarello, F. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We studied the physical parameters of the penumbra in a large and fully developed sunspot, one of the largest over the last two solar cycles, by using full-Stokes measurements taken at the photospheric Fe i 617.3 nm and ...
  • Penumbral decay observed in active region NOAA 12585 
    Murabito, M.; Guglielmino, S. L.; Ermolli, I.; Romano, Paolo; Jafarzadeh, Shahin; Rouppe van der Voort, Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Context. The physical conditions leading the sunspot penumbra decay are poorly understood so far. Aims. We investigate the photospheric magnetic and velocity properties of a sunspot penumbra during the decay phase to ...
  • Polarized Kink Waves in Magnetic Elements: Evidence for Chromospheric Helical Waves 
    Stangalini, M.; Giannattasio, F.; Erdélyi, R.; Jafarzadeh, Shahin; Consolini, G.; Criscuoli, S.; Ermolli, I.; Guglielmino, S. L.; Zuccarello, F. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    In recent years, new high spatial resolution observations of the Sun's atmosphere have revealed the presence of a plethora of small-scale magnetic elements down to the resolution limit of the current cohort of solar ...
  • The 3D structure of the penumbra at high resolution from the bottom of the photosphere to the middle chromosphere 
    Murabito, Mariarita; Ermolli, I.; Giorgi, F.; Stangalini, Marco; Guglielmino, S. L.; Jafarzadeh, Shahin; Socas-Navarro, Hector; Romano, Paolo; Zuccarello, Francesca (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Abstract Sunspots are the most prominent feature of the solar magnetism in the photosphere. Although they have been widely investigated in the past, their structure remains poorly understood. Indeed, due to limitations in ...
  • The penumbral solar filaments from the photosphere to the chromosphere 
    Murabito, Mariarita; Ermolli, I.; Giorgi, F.; Stangalini, M.; Guglielmino, S. L.; Jafarzadeh, Shahin; Socas-Navarro, H.; Romano, P.; Zuccarello, F. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The magnetic field structure of sunspots above the photosphere remain poorly understood due to limitations in observations and the complexity of these atmospheric layers. In this regard, we studied the large isolated sunspot ...