Astrophysical Magnetohydrodynamics

Session

Morning session 1

Apr 10, 2009, 9:30 AM

Kiljavanranta Conference Centre, Finland

289. Stellar magnetic fields: observations and nonlinear modelling

Ms Marjaana Lindborg (Observatory, University of Helsinki)

4/10/09, 9:30 AM

290. Rapid dynamo saturation without net small-scale helicity losses

Mr Simon Candelaresi (NORDITA)

4/10/09, 9:50 AM

293. Gravitational stability of accretion discs

Ms Fazeleh Khajenabi (UCD)

4/10/09, 10:10 AM

294. The alpha effect with imposed and dynamo-generated magnetic fields

Fabio Del Sordo (NORDITA)

4/10/09, 10:30 AM

Estimates for the nonlinear alpha effect in helical turbulence are presented using two different approaches where a uniform magnetic field is applied either to the actual field, or where separate evolution equations are solved for a set of different test fields. Both approaches agree for stronger fields, but there are apparent discrepancies for weaker fields that can be explained by...