Tracking an eruptive prominence using multiwavelength and multiview observations on 2023 March 7

TL;DR

This study uses multiwavelength, multiview observations and a revised cone model to analyze the 2023 March 7 prominence eruption, revealing detailed 3D dynamics, deflections, and acceleration patterns of the CME and prominence.

Contribution

First application of the revised cone model to 3D reconstruction of an eruptive prominence, capturing its non-radial propagation and dynamic behavior.

Findings

Prominence experienced non-radial propagation with deflections around coronal loops.

Continuous acceleration of ~51 m/s^2 observed during early eruption phase.

CME front speed estimated at ~829 km/s, faster than the prominence core.

Abstract

In this paper, we carry out multiwavelength and multiview observations of the prominence eruption, which generates a C2.3 class flare and a coronal mass ejection (CME) on 2023 March 7. For the first time, we apply the revised cone model to three-dimension reconstruction and tracking of the eruptive prominence for ~4 hrs. The prominence propagates non-radially and makes a detour around the large-scale coronal loops in active region NOAA 13243. The northward deflection angle increases from ~36 degrees to ~47 degrees before returning to ~36 degrees and keeping up. There is no longitudinal deflection throughout the propagation. The angular width of the cone increases from ~30 degrees and reaches a plateau at ~37 degrees. The heliocentric distance of the prominence rises from ~1.1 to ~10.0 solar radii, and the prominence experiences continuous acceleration (~51 m/s^2) over two hours, which is probably related to the magnetic reconnection during the C-class flare. The true speed of CME front is estimated to be ~829 km/s, which is ~1.2 times larger than that of CME core (prominence). It is concluded that both acceleration and deflection of eruptive prominences in their early lives could be reproduced with the revised cone model.