The Chromosphere Underneath a Coronal Bright Point

Abstract Coronal bright points (CBPs) are sets of small-scale coronal loops, connecting opposite magnetic polarities, primarily characterized by their enhanced extreme-ultraviolet (EUV) and X-ray emission. Being ubiquitous, they thought to play an important role in heating the solar corona. We aim at characterizing barely explored chromosphere underneath CBPs, focusing on related spicular activity effects flux emergence CBPs. used high-resolution observations a CBP H ? Fe i 617.3 nm from Swedish 1 m Solar Telescope coordination with Dynamics Observatory. This work presents first observation spicules imaged . The were automatically detected using advanced image processing techniques, which applied Dopplergrams derived Here we report abundant occurrence close “footpoints” find that orientation such is aligned along EUV indicating constitute fundamental part whole structure. Spatiotemporal analysis across multiple channels indicates there propagating disturbances associated studied spicules, producing transient intensity variations individual loops. Two episodes appearing below analyzed, one them leading quiet-Sun Ellerman bombs enhancing nearby activity. paper unique evidence tight coupling between lower upper atmosphere CBP, thus helping unravel dynamic phenomena CBPs impact latter.