Conveners
Poster Session 1.5
- Emilia Kilpua (University of Helsinki)
On February 12, 2021 two subsequent eruptions occurred above the West limb, as seen along the Sun-Earth line. The first event appeared in the SOHO/LASCO-C2 images as a typical Coronal Mass Ejection (CME), starting around 12:48 UT with a projected speed on the order of 120 km/s, as provided by CACTUS catalog. This slow CME was followed ~7 hours later by a smaller and collimated prominence...
Working towards improved space weather predictions, we aim to quantify how the critical height at which the torus instability drives coronal mass ejections (CMEs) varies over time in a sample of solar active regions. We model the coronal magnetic fields of 37 bipolar active regions and quantify the critical height at their central polarity inversion lines throughout their lifetimes. We then...
Solar eruptive events entail a complex interplay of energy release, transport, and conversion processes. A quantitative characterization of the different forms of energy therefore represents a crucial observational constraint for models of solar eruptions in general, as well as for magnetic reconnection, heating, and particle-acceleration processes in particular. These constraints are derived...
Coronal Mass Ejections (CMEs) are large-scale eruptions expanding all the way from the low corona into the interplanetary space. Despite CMEs are spectacular events and attract wide interest among scientists and general public, these phenomena can seriously impact the Earth and potentially damage human facilities. CMEs have been studied quite extensively since their discovery, however...
Information on electric fields in the photosphere is required to calculate the electromagnetic energy flux through the photosphere and set up boundary conditions for data-driven magnetohydrodynamic (MHD) simulations of solar eruptions. Recently, the PDFISS method for inversions of electric fields from a sequence of vector magnetograms and Doppler velocity measurements was improved to...
Supra-arcade downflows (SADs) are tadpole-shaped dark voids that descend through the cusp-shaped field lines of the current sheet and observed throughout the prolonged flare decay phase. Therefore, probing the thermodynamical and magnetic nature of the SADs can offer new insights into the reconnection mechanism during the flare gradual phase. Here, we investigate six distinctively clear...
Coronal dimmings are sudden decreases of the solar EUV and X-ray emission caused by coronal mass ejection (CMEs). Dimming regions map to the bipolar ends of closed magnetic field lines that become stretched or temporarily opened during an eruption, and are a result of the depletion of coronal plasma caused by the expansion and mass loss due to the CME. Recently available multi-point imagery...
