GENERATION OF MAGNETIC SEED FIELDS IN PROTOGALACTIC CLOUDS DUE TO PLASMA-NEUTRAL GAS FRICTION

Authors
WIECHEN H BIRK GT LESCH H
Citation
H. Wiechen et al., GENERATION OF MAGNETIC SEED FIELDS IN PROTOGALACTIC CLOUDS DUE TO PLASMA-NEUTRAL GAS FRICTION, Astronomy and astrophysics (Berlin), 334(2), 1998, pp. 388-394
Citations number
29
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics (Berlin) → ACNP
ISSN journal
00046361
Volume
334
Issue
2
Year of publication
1998
Pages
388 - 394
Database
ISI
SICI code
0004-6361(1998)334:2<388:GOMSFI>2.0.ZU;2-9
Abstract
We show that plasma - neutral gas friction in a weakly ionized rotatin g protogalactic system creates magnetic fields of seed field order. Fo r these purposes we present results of 2-fluid simulations. Considerin g primordial gas clouds, this mechanism yields a magnetic field of the order of 10(-15) G on time scales of 10(6) yr and spatial scales of s everal hundred parsec. Such fields are a reasonable input for further amplification processes.