6.宇宙におけるダストプラズマ現象(<小特集>ダストプラズマの現状と課題)

概要

論文の詳細を見る
The dissipation of magnetic fields in interstellar molecular clouds is an important process relating to star formation. Dust grains play important roles in this dissipation. While recombination of ions and electrons at the grain surface significantly lowers the ionization fraction and then enhances the dissipation rate, charged grains also interact with the magnetic field and thereby greatly lower the dissipation rate. Although ions are frozen in to magnetic field except at very high densities, grains are not always frozen in. We show how to treat the interaction of such grains with magnetic field and with neutral molecules, and examine the time scale of magnetic flux loss and motion of charged grains in molecular clouds.
1997-11-25