Generation of magnetic seed fields in self-gravitating protogalactic clouds

Details Generation of magnetic seed fields in self-gravitating protogalactic clouds Generation of magnetic seed fields in self-gravitating protogalactic clouds

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...393..685b&link_type=abstract

Astronomy and Astrophysics, v.393, p.685-691 (2002)

Astronomy and Astrophysics

Astrophysics

8

Magnetic Fields, Galaxies: Formation, Methods: Numerical

Scientific paper

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 106 years.

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