55 citations · 192 across the 9 of their papers we have counts for
9 papers
Detection of anomalous element distribution in the extremely slowly rotating magnetic O9.7 V star HD 54879
S. P. Järvinen, S. Hubrig., M. Schöller +4
The O9.7 V star HD 54879 is currently the only massive magnetic star whose magnetic field geometry and rotation period are not constrained. Over the last three years, we gathered a…
Detection of a centrifugal magnetosphere in one of the most massive stars in the Oph star-forming cloud
S. Hubrig, M. Schöller, S. P. Järvinen +3
Recent XMM-Newton observations of the B2 type star rho Oph A indicated a periodicity of 1.205d, which was ascribed to rotational modulation. Since variability of X-ray emission in…
Current helicity and electromotive force of magnetoconvection influenced by helical background fields
Guenther Ruediger, Manfred Kueker
Motivated by the empirical finding that the known hemispheric rules for the current helicity at the solar surface are not strict, the excitation of small-scale current helicity by…
Doppler images and the underlying dynamo. The case of AF Leporis
S. P. Järvinen, R. Arlt, T. Hackman +6
The (Zeeman-)Doppler imaging studies of solar-type stars very often reveal large high-latitude spots. This also includes F stars that possess relatively shallow convection zones, i…
The existence of the Lambda effect in the solar convection zone indicated by SDO observations
Guenther Ruediger, Manfred Kueker, Ilya Tereshin
The empirical finding with data from the Solar Dynamics Observatory (SDO) of positive (negative) horizontal Reynolds stress at the northern (southern) hemisphere for solar giant ce…
Differential rotation and meridional flow on the lower zero age main sequence: Reynolds stress versus baroclinic flow
M. Kueker, G. Ruediger
We study the variation of surface differential rotation and meridional flow along the lower part of the zero age main sequence (ZAMS). We first compute a sequence of stellar models…