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Recurrence of fragmenting granules and their relation to meso- and supergranular flow fields

Published online by Cambridge University Press:  17 November 2003

J. Arnaud ,
N. Meunier ,
Th. Roudier ,
F. Lignières ,
M. Rieutord ,
P. N. Brandt  and
J.-M. Malherbe
Th. Roudier
Affiliation:
Observatoire Midi-Pyrénées, 57 avenue d'Azereix, BP. 826, Tarbes Cedex, France
F. Lignières
Affiliation:
Laboratoire d'Astrophysique de Toulouse, Observatoire Midi-Pyrénées, 14 avenue E. Belin, 31400 Toulouse, France
M. Rieutord
Affiliation:
Laboratoire d'Astrophysique de Toulouse, Observatoire Midi-Pyrénées, 14 avenue E. Belin, 31400 Toulouse, France
P. N. Brandt
Affiliation:
Kiepenheuer-Institut für Sonnenphysik, Schöneckstrasse 6, 79104 Freiburg, Germany
J.-M. Malherbe
Affiliation:
LESIA, Observatoire de Paris, Section de Meudon, 92195 Meudon, France
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Abstract

The 3D analysis (x, y, t) of the granulation intensity field (11-hour time sequence from Swedish Vacuum Solar Telescope onLa 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.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 9: Magnetism and Activity of the Sun and Stars , 2003 , pp. 371
Copyright
© EAS, EDP Sciences, 2003

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