Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh41a1624c&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SH41A-1624
Astronomy and Astrophysics
Astrophysics
[2100] Interplanetary Physics, [2111] Interplanetary Physics / Ejecta, Driver Gases, And Magnetic Clouds, [2139] Interplanetary Physics / Interplanetary Shocks, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections
Scientific paper
Fast CMEs drive interplanetary shocks and these are one of the most important space weather phenomena. However, the kinematics of fast CMEs/shocks is not well understood. We present an analytical and a numerical model to study this problem, focusing on the physical processes that control this evolution in the interplanetary medium. The two models show that the the CME/shock evolution is constituted by three phases: 1) injection of the fast CME in the ambient wind, shock formation and propagation at a quasi-stationary speed; 2) uncoupling process between the CME (driver) and the shock; and 3) the ICME and the shock decelerate and the ICME/shock system reaches the equilibrium with its surroundings (ambient wind speed). The analytical models allow us to calculate arrival times for ICMEs and their shocks. We present some comparisons with observations.
Corona-Romero P.
Gonzalez-Esparza Americo
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