The Magnetic Helicity Driven Solar-Type Dynamo

(1)The previous theoretical studies showed that the large-scale vorticity generate the divergent-type helicity flux from the magnetic fluctuations. Similarly to the $\alpha$ effect, this breaks the equatorial reflection symmetry of the magnetic fluctuations in the stellar convection zone. This effect was called the new Visniac flux (hereafter the NV flux). 2)Methods. Using the mean-field dynamo model we study the effect of the NV flux on the solar type dynamos. 3)Results. We found that the NV flux results to a increase of the dynamo efficiency for the turbulent generation of the large-scale poloidal magnetic field of the Sun. The dynamic effect of the NV flux on the magnetic field evolution results into concentrating the dynamo waves toward the equator. Using the numerical simulations of the mean-field dynamo model we compare the helicity production rates by the turbulent dynamo effects, like the $\alpha$ effect and the NV flux. The model shows that the new dynamo source due to large-scale vorticity and small-scale dynamo results into amplification of the poloidal magnetic field generation in polar regions at the top of dynamo domain. Therefore the fluctuating magnetic activity at high latitudes of the Sun provides the additional source of the large-scale poloidal magnetic field.