Mandal, S. ; Peter, H. ; Klimchuk, J. A. ; Solanki, S. K. ; Chitta, L. P. ; Cuadrado, R. A. ; Schuhle, U. ; Terrace, L. ; Berghmans, D.

Talk presented at 11th Coronal Loop Workshop on 2024-06-25

Abstract: Coronal loops are some of the most easily recognizable features within the solar corona. Despite years of research, some aspects of these arched structures are still not well understood, such as the loop's cross-section and its variation along its length. In a recent study, we conducted a stereoscopic analysis of the morphology and dynamics of a coronal loop using high resolution images from two different spacecraft - the High Resolution Imager (HRI) of the Extreme Ultraviolet Imager on board the Solar Orbiter, and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory. Our findings suggest that the observed loop exhibits similar widths in both datasets, indicating that the cross-sectional shape of the loop is circular. Additionally, the loop maintained a uniform width along its entire length, which supports the idea that coronal loops do not show expansions. Moreover, this loop's highly unusual dynamics make this a fascinating case study. I will discuss the implications of these results on our understanding of loop formations, particularly from the perspective of the 'coronal veil' hypothesis.

Keyword(s): corona ; EUV ; Solar Orbiter
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