English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We investigate triggering, activation, and ejection of a solar eruptiveprominence that occurred in a multi-polar flux system of active region NOAA11548 on 2012 August 18 by analyzing data from AIA on board SDO, RHESSI, andEUVI/SECCHI on board STEREO. Prior to the prominence activation, we observedstriking coronal activities in the form of a blowout jet which is associatedwith rapid eruption of a cool flux rope. Further, the jet-associated flux ropeeruption underwent splitting and rotation during its outward expansion. Thesecoronal activities are followed by the prominence activation during which itslowly rises with a speed of ~12 km/s while the region below the prominenceemits gradually varying EUV and thermal X-ray emissions. From theseobservations, we propose that the prominence eruption is a complex, multi-stepphenomenon in which a combination of internal (tether-cutting reconnection) andexternal (i.e., pre-eruption coronal activities) processes are involved. Theprominence underwent catastrophic loss of equilibrium with the onset of theimpulsive phase of an M1.8 flare suggesting large-scale energy release bycoronal magnetic reconnection. We obtained signatures of particle accelerationin the form of power law spectra with hard electron spectral index (delta ~ 3)and strong HXR footpoint sources. During the impulsive phase, a hot EUVplasmoid was observed below the apex of the erupting prominence that ejected inthe direction of the prominence with a speed of ~177 km/s. The temporal,spatial and kinematic correlations between the erupting prominence and theplasmoid imply that the magnetic reconnection supported the fast ejection ofprominence in the lower corona.

Pre-flare coronal jet and evolutionary phases of a solar eruptive prominence associated with M1.8 flare: SDO and RHESSI observations