208 citations · 1.6k across the 48 of their papers we have counts for
6 papers · 1 filter
The butterfly diagram in the 18th century
Rainer Arlt
Digitized images of the drawings by J.C. Staudacher were used to determine sunspot positions for the period of 1749-1796. From the entire set of drawings, 6285 sunspot positions we…
The generation and stability of magnetic fields in CP stars
R. Arlt
A variety of magnetohydrodynamic mechanisms that may play a role in magnetic, chemically peculiar (mCP) stars is reviewed. These involve dynamo mechanisms in laminar flows as well…
A numerical MHD model for the solar tachocline
A. Sule, R. Arlt, G. Ruediger
There are successful approaches to explain the formation of the tachocline by a poloidal magnetic field in the solar core. We present here the first MHD simulations of the solar ta…
Differential rotation decay in the radiative envelopes of CP stars
Rainer Arlt, Rainer Hollerbach, Guenther Ruediger
Stars of spectral classes A and late B are almost entirely radiative. CP stars are a slowly rotating subgroup of these stars. It is possible that they possessed long-lived accretio…
Physics of the solar cycle
Günther Rüdiger, Rainer Arlt
The theory of the solar/stellar activity cycles is presented, based on the mean-field concept in magnetohydrodynamics. A new approach to the formulation of the electromotive force…
Global accretion disk simulations of magneto-rotational instability
R. Arlt, G. Rudiger
We perform global three-dimensional simulations of accretion disks integrating the compressible, non-viscous, but diffusive MHD equations. The disk is supposed to be isothermal. We…