4 papers
On the possibility of a bimodal solar dynamo
K. Petrovay
A simple way to couple an interface dynamo model to a fast tachocline model is presented, under the assumption that the dynamo saturation is due to a quadratic process and that the…
The Effect of Abnormal Granulation on Acoustic Wave Travel Times and Mode Frequencies
K. Petrovay, R. Erdelyi, M. J. Thompson
Observations indicate that in plage areas (i.e. in active regions outside sunspots) acoustic waves travel faster than in quiet sun, leading to shortened travel times and higher p-m…
Helical Magnetic Fields in Solar Active Regions: Theory vs. Observations
K. Petrovay, P. Chaterjee, A. Choudhuri
The mean value of the normalized current helicity in solar active regions is on the order of 1e-8 1/m, negative in the northern hemisphere, positive in the southern hemisphere. Obs…
Origin and Propagation of Fluctuations of Turbulent Magnetic Fields
K. Petrovay
The degree of linear polarization has recently been found to show wide random variations over the solar disk. These variations are presumably at least partly due to fluctuations in…