Matloch, Łukasz, Cameron, Robert, Shelyag, Sergiy, Schmitt, Dieter and Schüssler, Manfred (2010) Mesogranular structure in a hydrodynamical simulation. Astronomy & Astrophysics, 519. A52. ISSN 0004-6361
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1007.0387v1.pdf - Accepted Version Download (7MB) | Preview |
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Sun: granulation, Sun: photosphere |
| Subjects: | F300 Physics F500 Astronomy G100 Mathematics |
| Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
| Depositing User: | Sergiy Shelyag |
| Date Deposited: | 23 May 2016 14:29 |
| Last Modified: | 01 Aug 2021 02:36 |
| URI: | http://nrl.northumbria.ac.uk/id/eprint/26908 |
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