| Type |
Journal Article |
| Names |
Mark S. Miesch, Benjamin P. Brown |
| Publication |
The Astrophysical Journal Letters |
| Volume |
746 |
| Issue |
2 |
| Pages |
L26 |
| Date |
February 1, 2012 |
| URL |
http://adsabs.harvard.edu/abs/2012ApJ...746L..26M |
| Library Catalog |
NASA ADS |
| Abstract |
We present the first global, three-dimensional simulations of
solar/stellar convection that take into account the influence of
magnetic flux emergence by means of the Babcock-Leighton (BL) mechanism.
We have shown that the inclusion of a BL poloidal source term in a
convection simulation can promote cyclic activity in an otherwise steady
dynamo. Some cycle properties are reminiscent of solar observations,
such as the equatorward propagation of toroidal flux near the base of
the convection zone. However, the cycle period in this young sun
(rotating three times faster than the solar rate) is very short (~6
months) and it is unclear whether much longer cycles may be achieved
within this modeling framework, given the high efficiency of field
generation and transport by the convection. Even so, the incorporation
of mean-field parameterizations in three-dimensional convection
simulations to account for elusive processes such as flux emergence may
well prove useful in the future modeling of solar and stellar activity
cycles. |
| Tags |
Convection, Magnetohydrodynamics: MHD, SUN: INTERIOR, Sun: dynamo, stars: magnetic field |