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- University of TurkuFI274 papers
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34 papers · 1 filter
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…
Plaquette expectation value and gluon condensate in three dimensions
A. Hietanen, K. Kajantie, M. Laine +2
In three dimensions, the gluon condensate of pure SU(3) gauge theory has ultraviolet divergences up to 4-loop level only. By subtracting the corresponding terms from lattice measur…
Tuning of the Gap in a Laughlin-Bychkov-Rashba Incompressible Liquid
Marco Califano, Tapash Chakraborty, and Pekka Pietiläinen
We report on our investigation of the influence of Bychkov-Rashba spin-orbit interaction (SOI) on the incompressible Laughlin state. We find that experimentally obtainable values o…
Did Open Solar Magnetic Field Increase during the Last 100 Years: A Reanalysis of Geomagnetic Activity
K. Mursula, D. Martini, A. Karinen
Long-term geomagnetic activity presented by the aa index has been used to show that the heliospheric magnetic field has more than doubled during the last 100 years. However, seriou…
Systematically Asymmetric Heliospheric Magnetic Field: Evidence for a Quadrupole Mode and Non-axisymmetry with Polarity Flip-flops
K. Mursula, T. Hiltula
Recent studies of the heliospheric magnetic field (HMF) have detected interesting, systematic hemispherical and longitudinal asymmetries which have a profound significance for the…
X-ray luminosity function of low-mass X-ray binaries in galaxies
K. A. Postnov, A. G. Kuranov
X-ray luminosity function derived from observations of X-ray sources in galactic bulges can be explained by prinicipal evolutionary relations for mass accretion rate onto the compa…