14 citations · 29 across the 5 of their papers we have counts for
9 papers · 1 filter
Molecular cloud abundances and anomalous diffusion
G. Marschalko, K. Petrovay, E. Forgacs-Dajka
The chemistry of molecular clouds has been studied for decades, with an increasingly general and sophisticated treatment of the reactions involved. Yet the treatment of turbulent d…
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…
"Black Star" or Astrophysical Black Hole?
K. Petrovay
Recently wide publicity has been given to a claim by T. Vachaspati that "black holes do not exist", that the objects known as black holes in astrophysics should rather be called "b…
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…
Development of twist in an emerging magnetic flux tube by poloidal field accretion
P. Chatterjee, A. R. Choudhuri, K. Petrovay
Following an earlier proposal by Choudhuri (2003) for the origin of twist in the magnetic fields of solar active regions, we model the penetration of a wrapped up background poloid…