000005659 001__ 5659
000005659 005__ 20220131115900.0
000005659 0247_ $$2DOI$$a 10.1051/0004-6361/202142041
000005659 037__ $$aSCART-2022-0037
000005659 100__ $$aMandal, Sudip 
000005659 245__ $$aPropagating brightenings in small loop-like structures in the quiet-Sun corona: Observations from Solar Orbiter/EUI
000005659 260__ $$c2021
000005659 520__ $$aBrightenings observed in solar extreme-ultraviolet images are generally interpreted as signatures of micro- or nanoflares occurring in the transition region or at coronal temperatures. Recent observations with the Extreme Ultraviolet Imager (EUI) on board Solar Orbiter have revealed the smallest of such brightenings (called campfires) in the quiet-Sun corona. Analyzing EUI 174 Å data obtained at a resolution of about 400 km on the Sun with a cadence of 5 s on 30 May 2020, we report here a number of cases in which these campfires exhibit propagating signatures along their apparently small (3-5 Mm) loop-like structures. The measured propagation speeds are generally between 25 km s−1 and 60 km s−1. If the loop plasma is assumed to be at a million Kelvin, these apparent motions would be slower than the local sound speed. Furthermore, these brightenings exhibit nontrivial propagation characteristics such as bifurcation, merging, reflection, and repeated plasma ejections. We suggest that these features are manifestations of the internal dynamics of these small-scale magnetic structures and could provide important insights into the dynamic response (∼40 s) of the loop plasma to the heating events and also into the locations of the heating events themselves.
000005659 594__ $$aSTCE
000005659 6531_ $$aSolar Orbiter
000005659 6531_ $$aEUI
000005659 700__ $$aPeter, Hardi 
000005659 700__ $$aPradeep Chitta, Lakshmi 
000005659 700__ $$aSolanki, Sami K.  
000005659 700__ $$aAznar Cuadrado, Regina 
000005659 700__ $$aTeriaca, Luca 
000005659 700__ $$aSchühle, Udo 
000005659 700__ $$aBerghmans, David 
000005659 700__ $$aAuchère, Frédéric
000005659 773__ $$nid.L16$$pAstronomy & Astrophysics$$v656$$y2021
000005659 8560_ $$fdavid.berghmans@observatoire.be
000005659 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2021A%26A...656L..16M/abstract
000005659 905__ $$apublished in
000005659 980__ $$aREFERD