What is the true nature of blinkers?
S. Subramanian, M. S. Madjarska, J. G. Doyle, D. Bewsher

TL;DR
This study investigates the true nature of EUV brightenings called blinkers, revealing they are diverse phenomena originating from different atmospheric layers, contributing to the temperature structure of the solar transition region and corona.
Contribution
The paper provides a comprehensive multi-instrument analysis showing blinkers are a range of transient events with different origins and lifetimes, clarifying their role in solar atmospheric dynamics.
Findings
Two-thirds of blinkers have coronal counterparts linked to jets and brightenings.
Remaining blinkers are point-like, with chromospheric/transition region origins.
Blinker lifetimes vary across wavelengths, decreasing from chromosphere to corona.
Abstract
The aim of this work is to identify the true nature of the transient EUV brightenings, called blinkers. Co-spatial and co-temporal multi-instrument data, including imaging (EUVI/STEREO, XRT and SOT/Hinode), spectroscopic (CDS/SoHO and EIS/Hinode) and magnetogram (SOT/Hinode) data, of an isolated equatorial coronal hole were used. An automatic program for identifying transient brightenings in CDS O V 629 A and EUVI 171 A was applied. We identified 28 blinker groups in the CDS O V 629 A raster images. All CDS O V 629 A blinkers showed counterparts in EUVI 171 A and 304 A images. We classified these blinkers into two categories, one associated with coronal counterparts and other with no coronal counterparts as seen in XRT images and EIS Fe XII 195.12 A raster images. Around two-thirds of the blinkers show coronal counterparts and correspond to various events like EUV/X-ray jets,…
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