Abstract
Aims
We analyse mesogranular flow patterns in a three-dimensional hydrodynamical simulation of solar surface convection in order to determine its characteristics.
Methods
We calculate divergence maps from horizontal velocities obtained with the local correlation tracking (LCT) method. Mesogranules are identified as patches of positive velocity divergence. We track the mesogranules to obtain their size and lifetime distributions. We vary the analysis parameters to verify if the pattern has characteristic scales.
Results
The characteristics of the resulting flow patterns depend on the averaging time and length used in the analysis.
Conclusions
We conclude that the mesogranular patterns do not exhibit intrinsic length and time scales.
Original language | English |
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Pages (from-to) | A52 |
Journal | Astronomy & Astrophysics |
Volume | 519 |
Early online date | 10 Sept 2010 |
DOIs | |
Publication status | E-pub ahead of print - 10 Sept 2010 |
Keywords
- Sun: granulation
- Sun: photosphere