EDP Sciences
Free access
Volume 419, Number 2, May IV 2004
Page(s) 757 - 762
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20035739

A&A 419, 757-762 (2004)
DOI: 10.1051/0004-6361:20035739

Relation between families of granules, mesogranules and photospheric network

Th. Roudier and R. Muller

Laboratoire d'Astrophysique de Toulouse, Observatoire Midi-Pyrénées, 57 avenue d'Azereix 65008 Tarbes, France
(Received 25 November 2003 / Accepted 13 February 2004)

The analysis of a solar granulation 3-h time sequence obtained at the Pic du Midi Observatory confirms the existence of Trees of Fragmenting Granules (TFG). The TFG lifetime histogram is fitted by a power law with an exponent equal to -1.68. The positive divergences (i.e. mesogranules) come from several families that are visible at different stages of the mesogranule evolution. We observe a good coincidence between the cork (passive scalars) distribution and the TFG boundaries. Thus, TFGs seem to play a role in the diffusion of the magnetic elements on the Sun surface.

Key words: Sun: photosphere -- Sun: granulation

Offprint request: Th. Roudier, roudier@obs-mip.fr

© ESO 2004