Dynamic Analysis of a coronal mass ejection at distance from 1 to 40 solar radii.

DI LORENZO, LEONARDO; CREMADES, HEBE; BALMACEDA, LAURA; BRAGA, C. R.

La Serena

Conferencia; XII Latin American Conference on Space Geophysics (Colage 2021).; 2022

The Latin American Association of Space Geophysics

We perform the kinematic characterization of the coronal mass ejection (CME) on April 2, 2019, in a range of heliocentric distances of $sim$ 5 to 46 solar radii. We use observations from: LASCO-C3 onboard 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 determine 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 intervening internal forces during the CME propagation, in particular the Lorentz force $F_{em}$, the thermal force $F_{th}$, and the centrifugal force $F_p$.