Diffusion of magnetic elements in a supergranular cell

Abstract

Small scale magnetic fields (magnetic elements) are ubiquitous in the solar photosphere. Their interaction can provide energy to the upper atmospheric layers, and contribute to heat the solar corona. In this work, the dynamic properties of magnetic elements in the quiet Sun are investigated. The high number of magnetic elements detected in a supegranular cell allowed us to compute their displacement spectrum $⟨(\Delta r{)}^2⟩\propto {\tau }^{\gamma }$ (being $\gamma >0$, and $\tau$ the time since the first detection), separating the contribution of the network (NW) and the internetwork (IN) regions. In particular, we found $\gamma =1.27\pm 0.05$ and $\gamma =1.08\pm 0.11$ in NW (at smaller and larger scales, respectively), and $\gamma =1.44\pm 0.08$ in IN. These results are discussed in light of the literature on the topic, as well as the implications for the build up of the magnetic network.

References in corpus (14)

• Heating of the Solar Chromosphere and Corona by Alfven Wave Turbulence
• Emergence of Small-Scale Magnetic Loops in the Quiet Sun Internetwork
• Hinode Observations of Magnetic Elements in Internetwork Areas
• Analysis of Quiet-Sun Internetwork Magnetic Fields Based on Linear Polarization Signals
• Migration of Ca II H bright points in the internetwork
• Mesogranulation and the solar surface magnetic field distribution
• Diffusion of solar magnetic elements up to supergranular spatial and temporal scales
• Identifying Potential Markers of the Sun's Giant Convective Scale
• Dead calm areas in the very quiet Sun
• Pervasive Linear Polarization Signals in the Quiet Sun
• First evidence of interaction between longitudinal and transverse waves in solar magnetic elements
• The relation between photospheric supergranular flows and magnetic flux emergence
• The spectrum of kink-like oscillations of solar photospheric magnetic elements
• 3D photospheric velocity field of a Supergranular cell

Cited by in corpus (23)

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• Characterising motion types of G-band bright points in the quiet Sun
• Non-linear propagation of kink waves to the solar chromosphere
• Observational evidence for buffeting induced kink waves in solar magnetic elements
• Relation between trees of fragmenting granules and supergranulation evolution
• Pair separation of magnetic elements in the quiet Sun
• Supergranular turbulence in a quiet Sun: Lagrangian coherent structures
• Dispersal of G-band bright points at different longitudinal magnetic field strengths
• Dynamics of internetwork chromospheric fibrils: Basic properties and MHD kink waves
• Kinematics of Magnetic Bright Features in the Solar Photosphere
• Super-diffusion versus competitive advection: a simulation
• Magnetic pattern at supergranulation scale: the Void Size Distribution
• Analysis of quiet-sun turbulence on the basis of SDO/HMI and Goode Solar Telescope data
• Transport of internetwork magnetic flux elements in the solar photosphere
• Occurrence and persistence of magnetic elements in the quiet Sun
• Dynamics of Trees of Fragmenting Granules in the Quiet Sun: Hinode/SOT Observations Compared to Numerical Simulation
• Chromospheric Rapid Blueshifted Excursions Observed with IBIS and Their Association with Photospheric Magnetic Field Evolution
• Dispersion of the solar magnetic flux in undisturbed photosphere as derived from SDO/HMI data
• Dynamics of the photosphere along the solar cycle from SDO/HMI
• Analysis of Pseudo-Lyapunov Exponents of Solar Convection Using State-of-the-Art Observations
• Texture of average solar photospheric flows and the donut-like pattern
• Dispersion of small magnetic elements inside active regions on the Sun
• Observational characterisation of large-scale transport and horizontal turbulent diffusivity in the quiet Sun