492 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- W. Schmidt2 profiles60 · h 35
- S. Berdyugina2 profiles44 · h 28
- J. C. del Toro Iniesta36 · h 22
- R. Schlichenmaier36 · h 29
- A. Gandorfer34 · h 32
- V. Pillet34 · h 38
- S. Solanki3 profiles32 · h 78
- J. Borrero31 · h 24
- C. Beck3 profiles30 · h 24
- O. Steiner3 profiles30 · h 20
- M. Knölker28 · h 25
- M. Roth2 profiles27 · h 69
- Instituto de Astrofísica de CanariasES144 papers
- Max Planck Institute for Solar System ResearchDE129 papers
- Universidad de La LagunaES103 papers
- Instituto de Astrofísica de AndalucíaES83 papers
- Centre National de la Recherche ScientifiqueFR68 papers
- Leibniz Institute for Astrophysics PotsdamDE62 papers
- Kyung Hee UniversityKR61 papers
- NSF NCAR High Altitude ObservatoryUS61 papers
- National Solar ObservatoryUS60 papers
- Istituto Ricerche Solari LocarnoCH56 papers
- Czech Academy of Sciences, Astronomical InstituteCZ54 papers
- University of GöttingenDE47 papers
9 papers · 2 filters
The problem of small and large scale fields in the solar dynamo
A. Brandenburg, N. E. L. Haugen, P. J. Käpylä +1
Three closely related stumbling blocks of solar mean field dynamo theory are discussed: how dominant are the small scale fields, how is the alpha effect quenched, and whether magne…
Estimates of the Strouhal number from numerical models of convection
P. J. Käpylä, M. J. Korpi, M. Ossendrijver +1
We determine the Strouhal number (hereafter St), which is essentially a nondimensional measure of the correlation time, from numerical calculations of convection. We use two indepe…
Magnetic field generation in fully convective rotating spheres
W. Dobler, M. Stix, A. Brandenburg
Magnetohydrodynamic simulations of fully convective, rotating spheres with volume heating near the center and cooling at the surface are presented. The dynamo-generated magnetic fi…
Local models of stellar convection III: The Strouhal number
P. J. Käpylä, M. J. Korpi, M. Ossendrijver +1
Aims: The Strouhal number (St), which is a nondimensional measure of the correlation time, is determined from numerical models of convection. The Strouhal number arises in the mean…
Local models of stellar convection II: Rotation dependence of the mixing length relations
P. J. Käpylä, M. J. Korpi, M. Stix +1
We study the mixing length concept in comparison to three-dimensional numerical calculations of convection with rotation. In a limited range, the velocity and temperature fluctuati…
Coronal heating through braiding of magnetic field lines
H. Peter, B. V. Gudiksen, A. Nordlund
Cool stars like our Sun are surrounded by a million degree hot outer atmosphere, the corona. Since more than 60 years the physical nature of the processes heating the corona to tem…
Helical coronal ejections and their role in the solar cycle
Axel Brandenburg, Christer Sandin, Petri J. Käpylä
The standard theory of the solar cycle in terms of an alpha-Omega dynamo hinges on a proper understanding of the nonlinear alpha effect. Boundary conditions play a surprisingly imp…
Phase diversity restoration of sunspot images I. Relations between penumbral and photospheric features
J. A. Bonet, I. Marquez, R. Muller +2
We investigate the dynamics of and the relations between small-scale penumbral and photospheric features near the outer penumbral boundary: penumbral grains (PGs), dark penumbral f…
Dynamics of solar coronal loops II. Catastrophic cooling and high-speed downflows
D. A. N. Mueller, H. Peter, V. H. Hansteen
This work addresses the problem of plasma condensation and ``catastrophic cooling'' in solar coronal loops. We have carried out numerical calculations of coronal loops and find sev…