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

Th. Roudier; F. Lignières; M. Rieutord; P. N. Brandt; J.-M. Malherbe

doi:10.1051/eas:2003123

All issues

Volume 9 (2003)

EAS Publications Series, 9 (2003) 371

Abstract

Issue		EAS Publications Series Volume 9, 2003 Magnetism and Activity of the Sun and Stars


Page(s)		371 - 371
DOI		https://doi.org/10.1051/eas:2003123
Published online		17 November 2003

Magnetism and Activity of the Sun and Stars
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

Th. Roudier¹, F. Lignières², M. Rieutord², P. N. Brandt³ and J.-M. Malherbe⁴

¹ 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

Abstract

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.