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Spatiotemporal scaling of solar surface flows
J K Lawrence1, A C Cadavid, A Ruzmaikin
1Department of Physics and Astronomy, California State University, Northridge, California 91330-8268, USA.
Physical Review Letters
|June 21, 2001
Summary
Solar magnetic bright points reveal turbulent plasma dynamics. Their random walk analysis suggests they are imperfectly correlated tracers within the Sun's granular convection flows.
Area of Science:
- Solar physics
- Plasma dynamics
- Turbulence
Background:
- The Sun's surface is a natural laboratory for nonlinear phenomena.
- Understanding plasma dynamics at small scales is crucial for solar physics.
Purpose of the Study:
- To investigate the small-scale dynamics of photospheric plasma.
- To analyze the motions of magnetic bright points at the smallest observed scales.
Main Methods:
- Analysis of magnetic bright point motions on the solar surface.
- Application of a continuous time random walk framework.
- Examination of spatial and temporal scaling of bright point paths.
Main Results:
- Observed motions exhibit characteristics of random walks.
- The scaling properties suggest imperfectly correlated tracers.
- Motions are consistent with flow within the lanes of granular convection cells.
Conclusions:
- Magnetic bright point motions provide insights into turbulent fluid flow on the Sun.
- The findings support the model of tracers within convective lanes.