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          Institute: MPI für extraterrestrische Physik     Collection: Theory & Complex Plasmas     Display Documents



ID: 10564.0, MPI für extraterrestrische Physik / Theory & Complex Plasmas
Generation of magnetic seed fields in self-gravitating protogalactic clouds
Authors:Birk, G. T.; Wiechen, H.; Lesch, H.
Language:English
Date of Publication (YYYY-MM-DD):2002-10
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:Astron. Astrophys.
Volume:393
Issue / Number:2
Start Page:685
End Page:691
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The seed magnetization of protogalaxies can be provided by relative shear flows and collisional friction of the ionized and the neutral fluid components in partially ionized self- gravitating and rotating protogalactic clouds. The gravitational potential of a collapsing protogalactic cloud is the ultimate energy source that partly is converted to magnetic fields and the associated electric currents by collisional momentum transfer in the partially ionized systems. Self- consistent plasma- neutral gas simulations, that take into account self- gravitation, show that magnetic fields of the order of some 10(-14) G are generated on spatial scales of some 100 pc in about 7 x 10(6) years.
Free Keywords:magnetic fields; galaxies : formation; methods : numerical
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für extraterrestrische Physik
External Affiliations:Univ Munich, Inst Astron & Astrophys, D-80539 Munich, Germany; Univ Munich, Inst Astron & Astrophys, D-80539 Munich, Germany; Ctr Interdisciplinary Plasma Sci, Garching, Germany; Max Planck Inst Extraterr Phys, D-8046 Garching, Germany
Identifiers:ISI:000178247400032
ISSN:0004-6361
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