AbstractWe study the heliocentric evolution of ICME-like disturbances and their associated transient forward shocks (TFSs) propagating in the interplanetary (IP) medium comparing the solutions of a hydrodynamic (HD) and magnetohydrodynamic (MHD) models using the ZEUS-3D code [Stone, J.M., Norman, M.L., 1992. Zeus-2d: a radiation magnetohydrodynamics code for astrophysical flows in two space dimensions. i – the hydrodynamic algorithms and tests. Astrophysical Journal Supplement Series 80, 753–790]. The simulations show that when a fast ICME and its associated IP shock propagate in the inner heliosphere they have an initial phase of about quasi-constant propagation speed (small deceleration) followed, after a critical distance (deflection point), by an exponential deceleration. By combining white light coronograph and interplanetary scintillation (IPS) measurements of ICMEs propagating within 1AU [Manoharan, P.K., 2005. Evolution of coronal mass ejections in the inner heliosphere: a study using white-light and scintillation images. Solar Physics 235 (1–2), 345–368], such a critical distance and deceleration has already been inferred observationally. In addition, we also address the interaction between two ICME-like disturbances: a fast ICME 2 overtaking a previously launched slower ICME 1. After interaction, the leading ICME 1 accelerates and the tracking ICME 2 decelerates and both ICMEs tend to arrive at 1AU having similar speeds. The 2-D HD and MHD models show similar qualitative results for the evolution and interaction of these disturbances in the IP medium.
Propagation and interaction of interplanetary transient disturbances. Numerical simulations
Advances in Space Research ; 40 , 12 ; 1815-1820
2007-06-07
6 pages
Article (Journal)
Electronic Resource
English
Propagation and interaction of interplanetary transient disturbances. Numerical simulations
Online Contents | 2007
|Tracking Interplanetary Disturbances using Interplanetary Scintillations
British Library Online Contents | 1997
|Observation of Travelling Interplanetary Disturbances
British Library Conference Proceedings | 2002
|Observation of travelling interplanetary disturbances
Online Contents | 2002
|Radio-scintillation observations of interplanetary disturbances
Elsevier | 1984
|