Understanding the dynamic evolution of the April 2, 2019 coronal mass ejection

L. DI LORENZO; L. BALMACEDA; H. CREMADES; C. R. BRAGA

Conferencia; Parker One Conference; 2021

JHU/APL

In this work, we perform the kinematic characterization of the coronal mass ejection (CME) on April 2, 2019, in a range of heliocentric distances of approximately 5 to 46 solar radii. We use observations from: LASCO-C3 on- board the Solar and Heliospheric Observatory (SOHO) spacecraft, SECCHI-COR2 and HI- 1 onboard the Solar Terrestrial Relations Observatory Ahead (STEREO-A) spacecraft and WISPR-I onboard the Parker Solar Probe (PSP) spacecraft. The CME was detected by PSP at a distance of 0.2 AU. From simultaneous observations by LASCO-C3 and COR2-A, we deduce the 3D position, velocity and acceleration of the CME. We combine these with measurements from the heliospheric imagers WISPR-I and HI-1 to determine the dynamic evolution of the CME. We analyze the contribution of the interven- ing internal forces during the CME propagation, in particular the Lorentz force Fem, the thermal force Fth, and the centrifugal force Fp.