Atmospheric Response to of an Active Region to new Small Flux Emergence

TL;DR

This study examines how a small flux emergence in an active region affects the solar atmosphere, revealing large-scale coronal loop formation, upflows, and jets, including the first observation of coronal jets over serpentine fields.

Contribution

It provides new observational evidence of the atmospheric response to small flux emergence, including large-scale loop formation and jets over serpentine fields.

Findings

Large-scale coronal loops formed up to 43 Mm from the EFR.

Coronal upflow enhancements of approximately 10 km/s observed.

First detection of coronal jets over serpentine magnetic fields.

Abstract

We investigate the atmospheric response to a small emerging flux region (EFR) that occurred in the positive polarity of Active Region 11236 on 23 \,-\ 24 June 2011. Data from the \textit{Solar Dynamics Observatory's Atmopheric Imaging Assembly} (AIA), the \textit{Helioseismic and Magnetic Imager} (HMI) and Hinode's \textit{EUV imaging spectrometer} (EIS) are used to determine the atmospheric response to new flux emerging into a pre-existing active region. Brightenings are seen forming in the upper photosphere, chromosphere, and corona over the EFR's location whilst flux cancellation is observed in the photosphere. The impact of the flux emergence is far reaching, with new large-scale coronal loops forming up to 43 Mm from the EFR and coronal upflow enhancements of approximately 10 km s$^{-1}$ on the north side of the EFR. Jets are seen forming in the chromosphere and the corona over the emerging serpentine field. This is the first time that coronal jets have been seen over the serpentine field.