Dependence of stellar magnetic activity cycles on rotational period in nonlinear solar-type dynamo

Autor:	Pipin, Valery, Kosovichev, Alexander
Rok vydání:	2016
Předmět:	Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.3847/0004-637X/823/2/133
Popis:	We study turbulent generation of large-scale magnetic fields using nonlinear dynamo models for solar-type stars in the range of rotational periods from 14 to 30 days. Our models take into account non-linear effects of dynamical quenching of magnetic helicity, and escape of magnetic field from the dynamo region due to magnetic buoyancy. The results show that the observed correlation between the period of rotation and the duration of activity cycles can be explained in the framework of a distributed dynamo model with a dynamical magnetic feedback acting on the turbulent generation either from magnetic buoyancy or magnetic helicity. We discuss implications of our findings for the understanding of dynamo processes operating in solar-like stars. Comment: 21 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1602.07815 Zobrazit plný text záznamu View this record from Arxiv