Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-09-08
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
28 pages, 10 figures
Scientific paper
Group velocity of electromagnetic waves in plasmas derived by standard relativistic resistive MHD (resistive RMHD) equations is superluminal. If we assume that the group velocity represents the propagation velocity of a signal, we have to worry about the causality problem. That is, some acausal phenomena may be induced, such that information transportation to the absolute past and spontaneous decrease in the entropy. Here, we tried to find the acausal phenomena using standard resistive RMHD numerical simulations in the suggested situation of the acausal phenomena. The calculation results showed that even in such situations no acausal effect happens. The numerical result with respect to the velocity limit of the information transportation is consistent with a linear theory of wave train propagation. Our results assure that we can use these equations without problems of acausal phenomena.
Koide Shinji
Morino Ryogo
No associations
LandOfFree
Group velocity and causality in standard relativistic resistive magnetohydrodynamics 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 Group velocity and causality in standard relativistic resistive magnetohydrodynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Group velocity and causality in standard relativistic resistive magnetohydrodynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-412590