Onset of Fast Magnetic Reconnection in Partially Ionized Gases

Type Journal Article
Names Leonid M. Malyshkin, Ellen G. Zweibel
Publication The Astrophysical Journal
Volume 739
Issue 2
Pages 72
Date October 1, 2011
URL http://adsabs.harvard.edu/abs/2011ApJ...739...72M
Library Catalog NASA ADS
Abstract We consider quasi-stationary two-dimensional magnetic reconnection in a partially ionized incompressible plasma. We find that when the plasma is weakly ionized and the collisions between the ions and the neutral particles are significant, the transition to fast collisionless reconnection due to the Hall effect in the generalized Ohm's law is expected to occur at much lower values of the Lundquist number, as compared to a fully ionized plasma case. We estimate that these conditions for fast reconnection are satisfied in molecular clouds and in protostellar disks.
Tags ISM: magnetic fields, Magnetic Fields, Magnetic reconnection, Sun: chromosphere, protoplanetary disks
UW-Madison Astronomy Home