| Issue |
A&A
Volume 414, Number 3, February II 2004
|
|
|---|---|---|
| Page(s) | 1065 - 1070 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20034178 | |
| Published online | 27 January 2004 | |
Ambient magnetic fields and dynamos: Pre-main sequence stars and elsewhere
Department of Mathematics, University of Manchester, Manchester M13 9PL, UK
Corresponding author: moss@ma.man.ac.uk
Received:
11
August
2003
Accepted:
21
October
2003
The effects of an ambient (i.e. “external”) poloidal magnetic field on mean field
dynamo action in a sphere are investigated. It is found that an ambient
field of strength comparable to that of the poloidal field of the isolated dynamo
will inhibit dynamo action. This ambient field will normally be
considerably weaker than the typical total field resulting from 
dynamo action.
Given earlier similar results for disc dynamos, this
appears to be a general result. Applications to pre-main sequence stars and the
history of magnetic white dwarfs are discussed.
Key words: magnetic fields / stars: evolution / stars: chemically peculiar / stars: magnetic fields / stars: pre-main sequence
© ESO, 2004
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