EAS Publications Series
Volume 9, 2003Magnetism and Activity of the Sun and Stars
|Page(s)||371 - 371|
|Published online||17 November 2003|
J. Arnaud and N. Meunier (eds)
EAS Publications Series, 9 (2003) 371
Recurrence of fragmenting granules and their relation to meso- and supergranular flow fields
Observatoire Midi-Pyrénées, 57 avenue d'Azereix, BP. 826, Tarbes Cedex, France
2 Laboratoire d'Astrophysique de Toulouse, Observatoire Midi-Pyrénées, 14 avenue E. Belin, 31400 Toulouse, France
3 Kiepenheuer-Institut für Sonnenphysik, Schöneckstrasse 6, 79104 Freiburg, Germany
4 LESIA, Observatoire de Paris, Section de Meudon, 92195 Meudon, France
The 3D analysis (x, y, t) of the granulation intensity field (11-hour time sequence from Swedish Vacuum Solar Telescope on La Palma, Canary Islands), demonstrated that the granules in the phostosphere are organized in ``Trees of Fragmenting Granules" (TFGs). A TFG consists of a family of repeatedly splitting granules, issued from one granule at its beginning. A striking result is that TFGs can live much longer (up to 8h10) than individual granules (10 mn). When averaged in time, such long-lived TFGs can be identified to the mesogranules. We also found a correlation between the network and the spatial distribution of TFGs.
© EAS, EDP Sciences, 2003
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