Dependence of the Anomalous Resistivity on the Induced Electric Field in Solar Flares

Details Dependence of the Anomalous Resistivity on the Induced Electric Field in Solar Flares Dependence of the Anomalous Resistivity on the Induced Electric Field in Solar Flares

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...720..771w&link_type=abstract

The Astrophysical Journal, Volume 720, Issue 1, pp. 771-775 (2010).

Astronomy and Astrophysics

Astronomy

2

Acceleration Of Particles, Sun: Flares, Turbulence

Scientific paper

Anomalous resistivity is a critical parameter for triggering the fast magnetic reconnection and interpreting the eruption of solar flares in the nearly collisionless coronal plasma. However, the mechanism for the production of anomalous resistivity and its evolution are weakly understood. In this paper, the one-dimensional Vlasov equation was numerically solved with the typical solar coronal parameters and realistic mass ratio in the presence of strong inductive electric field, and the relationship between the anomalous resistivity and the reconnecting electric field was inferred for the area near the center of reconnecting current sheets. Our principal findings are summarized as follows. (1) The relationship between the anomalous resistivity and the reconnecting electric field E 0 may be represented by ηeff = [10.82-10.99 exp (-0.36 E 0)]Ω m. (2) If E 0 is small enough, it may be described by ηeff = [4.02 E 0 - 0.18]Ω m, which is basically consistent with the early experimental results on the plasma response to the applied electric field. (3) In comparison with theoretical formulas for the current-driven ion-acoustic and Buneman anomalous resistivities, if E 0 is small, the anomalous resistivity may be due to the ion-acoustic instability; if E 0 is large, the anomalous resistivity may be due to the Buneman instability. These results are also basically consistent with early experiments.

Affiliated with

Also associated with

No associations

Rating

Dependence of the Anomalous Resistivity on the Induced Electric Field in Solar Flares does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dependence of the Anomalous Resistivity on the Induced Electric Field in Solar Flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dependence of the Anomalous Resistivity on the Induced Electric Field in Solar Flares will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1557837