Global 3-D solar-type star-disc dynamo systems: I. MHD modeling
Abstract
We have carried out global three-dimensional magnetohydrodynamic simulations of the star-disc interaction region around a young solar-type star. The magnetic field is generated and maintained by dynamos in the star as well as in the disc. The developing mass flows possess non-periodic time-variable azimuthal structure and are controlled by the nonaxisymmetric magnetic fields. Since the stellar field drives a strong stellar wind, accretion is anti-correlated with the stellar field strength and disc matter is spiraling onto the star at low latitudes, both contrary to the generally assumed accretion picture.
- Publication:
-
Astronomische Nachrichten
- Pub Date:
- May 2006
- DOI:
- 10.1002/asna.200510526
- Bibcode:
- 2006AN....327..340V
- Keywords:
-
- ISM: jets and outflows;
- accretion;
- accretion disks;
- magnetohydrodynamics (MHD);
- stars: mass-loss;
- stars: pre-main sequence