Numeric and analytic study of interplanetary coronal mass ejection and shock evolution: Driving, decoupling, and decaying

Details Numeric and analytic study of interplanetary coronal mass ejection and shock evolution: Driving, decoupling, and decaying Numeric and analytic study of interplanetary coronal mass ejection and shock evolution: Driving, decoupling, and decaying

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11605104c&link_type=abstract

Journal of Geophysical Research, Volume 116, Issue A5, CiteID A05104

Physics

Plasma Physics

Interplanetary Physics: Coronal Mass Ejections (4305, 7513), Interplanetary Physics: Ejecta, Driver Gases, And Magnetic Clouds, Interplanetary Physics: Interplanetary Shocks, Space Plasma Physics: Shock Waves (4455)

Scientific paper

We analyze the heliocentric evolution of fast interplanetary counterparts of coronal mass ejections (ICMEs) and their transient shocks to investigate how and where they decelerate in the interplanetary medium. We employ two one-dimensional hydrodynamic models, analytic and numeric, to study three fast CME events. We focus on the transferring of momentum from the ICME to the shock. The two models show that initially the fast ICME propagates at about a constant speed and drives the shock (driving stage) until it reaches a certain distance from which it decelerates and decouples from the shock (decoupling process). Then the ICME and its shock decelerate (decaying stage). This deceleration depends on the speed difference with respect to the ambient wind and tends to a negligible value when the ICME-shock approaches to the ambient wind speed. The location and duration of these propagation stages depend on the initial CME conditions and the ambient wind characteristics. We present a parametric study to compare the results by the analytic and numeric models, showing the variations of their results as a function of the initial conditions. We perform three study cases to compare the model's predictions with a set of speed measurements of ICME-shock events.

Affiliated with

Also associated with

No associations

Rating

Numeric and analytic study of interplanetary coronal mass ejection and shock evolution: Driving, decoupling, and decaying 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 Numeric and analytic study of interplanetary coronal mass ejection and shock evolution: Driving, decoupling, and decaying, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numeric and analytic study of interplanetary coronal mass ejection and shock evolution: Driving, decoupling, and decaying will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-932307