Numerical Study Of Eruptive Magnetic Flux Rope With Different Masses

A violent solar explosion can interrupt the communication equipment on the earth in a short time,bringing up damages to satellites and threatening the lives of astronaut-s.Therefore,it is extremely important to study the solar explosion activity.This thesis uses the MPI-AMRVAC program（hereinafter referred to as Amrvac）to conduct a de-tailed study of the outbreak of flux ropes with different masses.The main contents are as follows.We analyse the explosion process of the magnetic flux rope with 1m₀(1.58×10¹⁷g)and find that the explosion structure contains the three components of the coronal mass ejection（CME for short）and a shock wave which is tens of thousands of kilometers.The explosion activities of the magnetic flux rope with mass of 0.5m₀,1.5m₀and2m₀are simulated and analyzed.The results show that:（1）under the same conditions,the magnetic flux rope fails to erupt if it’s mass exceeds the threshold.And the critical value set in our simulation is less than 2m₀,since the magnetic flux rope with a mass of 2m₀can not successfully burst.（2）The smaller the mass of the magnetic flux rope,the faster the propagation speed and greater the different between the physical quantities on both sides of fast mode shock.（3）The propagation and acceleration are different.In these three sets of simulations,the smaller the mass,the greater the velocity of the magnetic flux rope.The average acceleration of the magnetic flux rope with a mass of0.5m₀is positive（3.25m/s²）;For magnetic flux rope with larger mass,it first experiences acceleration and then deceleration and the accelerations of 1m₀and 1.5m₀are-7.24m/s²and-16.18m/s²respectively.The high-energy particles ejected during the explosion of these magnetic flux ropes at different speeds may have different effects on the Earth when they reach the Earth’magnetosphere through interplanetary space.