R. Samadi (1,2), D. Georgobiani (3), R. Trampedach R. (4), M.-J. Goupil (2), R.F. Stein (5), A. Nordlund (6) ((1) Observatorio Astronomico UC, Coimbra, Portgal; (2) Observatoire de Paris, LESIA, Meudon, France ; (3) Center for Turbulence Research, Stanford University NASA Ames Research Center, Moffett Field, USA ; (4) Research School of Astronomy and Astrophysics, Mt. Stromlo Observatory, Weston, Australia ; (5) Department of Physics and Astronomy, Michigan State University, Lansing, USA ; (6) Niels Bohr Institute for Astronomy Physics and Geophysics, Copenhagen, Denmark)
