Relation between trees of fragmenting granules and supergranulation evolution

Abstract

Context: The determination of the underlying mechanisms of the magnetic elements diffusion over the solar surface is still a challenge. Understanding the formation and evolution of the solar network (NE) is a challenge, because it provides a magnetic flux over the solar surface comparable to the flux of active regions at solar maximum. Aims: We investigate the structure and evolution of interior cells of solar supergranulation. From Hinode observations, we explore the motions on solar surface at high spatial and temporal resolution. We derive the main organization of the flows inside supergranules and their effect on the magnetic elements. Method: To probe the superganule interior cell, we used the Trees of Fragmenting Granules (TFG) evolution and their relations to horizontal Results: Evolution of TFG and their mutual interactions result in cumulative effects able to build horizontal coherent flows with longer lifetime than granulation (1 to 2 hours) over a scale up to 12\arcsec. These flows clearly act on the diffusion of the intranetwork (IN) magnetic elements and also on the location and shape of the network. Conclusions: From our analysis during 24 hours, TFG appear as one of the major elements of the supergranules which diffuse and advect the magnetic field on the Sun's surface. The strongest supergranules contribute the most to magnetic flux diffusion in the solar photosphere.

arXiv comment13 pages, 17 figures, accepted in Astronomy and Astrophysics movie : http://www.lesia.obspm.fr/perso/jean-marie-malherbe/Hinode2007/hinode2007.html

References in corpus (10)

• The Solar Internetwork. I. Contribution to the Network Magnetic Flux
• Diffusion of magnetic elements in a supergranular cell
• Pair separation of magnetic elements in the quiet Sun
• Additional Evidence Supporting a Model of Shallow, High-Speed Supergranulation
• The relation between photospheric supergranular flows and magnetic flux emergence
• Mesoscale dynamics on the Sun's surface from HINODE observations
• Helioseismic Investigation of Modeled and Observed Supergranule Structure
• The Quest to Understand Supergranulation and Large-Scale Convection in the Sun
• Anisotropy of the solar network magnetic field around the average supergranule
• Super-diffusion versus competitive advection: a simulation

Cited by in corpus (16)

• Unexpectedly strong effect of supergranulation on the detectability of Earth twins orbiting Sun-like stars with radial velocities
• The Impact of Stellar Surface Magnetoconvection and Oscillations on the Detection of Temperate, Earth-Mass Planets Around Sun-Like Stars
• Supergranulation and multiscale flows in the solar photosphere: Global observations vs. a theory of anisotropic turbulent convection
• Activity time series of old stars from late F to early K. I. Simulating radial velocity, astrometry, photometry, and chromospheric emission
• Evolution of the magnetic field of Betelgeuse from 2009 - 2017
• The effects of granulation and supergranulation on Earth-mass planet detectability in the habitable zone around F6-K4 stars
• Evolution and wave-like properties of the average solar supergranule
• Occurrence and persistence of magnetic elements in the quiet Sun
• On the Magnetic Nature of an Exploding Granule as Revealed by Sunrise/IMaX
• Dynamics of Trees of Fragmenting Granules in the Quiet Sun: Hinode/SOT Observations Compared to Numerical Simulation
• Evolution of exploding granules from coordinated observations by THEMIS, IRIS, SDO/HMI, and HINODE, and a simulation
• Link between trees of fragmenting granules and deep downflows in MHD simulation
• Texture of average solar photospheric flows and the donut-like pattern
• Magnetic outbreak associated with exploding granulations
• Observational characterisation of large-scale transport and horizontal turbulent diffusivity in the quiet Sun
• Observations of the formation of a proto-spot in a pre-existing field environment