High-resolution He I 10830 Å Narrowband Imaging for a Small-scale Chromospheric Jet

Abstract Solar jets are ubiquitous phenomena in the solar atmosphere. They important mass and energy transport to upper atmosphere interplanetary space. Here, we report a detailed analysis of small-scale chromospheric jet with high-resolution He i 10830 Å TiO 7057 images observed by 1.6 m aperture Goode Telescope at Big Bear Observatory. The observation reveals finest dark threads inside rooted intergranular lanes. Their width is equal telescope’s diffraction limit (?100 km). recurrent its association emergence convergence magnetic flux observed. Together other features like photospheric flow toward polarity inversion line, bald-patch configuration, earlier excitation helium atoms, propose that might be initiated reconnection U-shaped loop configuration. plasmoid configuration results from possible buoyancy reconnection, which reoccurs second step an overlying field line. Notably, second-step produces not only bidirectional cool or hot flows but also new feature may used explain behavior jet, since can driven reconnect again.