Multithermal Structure of Solar Jets Based on Combined EUV and H α Observations
Year: 2026
Type: article
Abstract: This study investigates the multithermal structure of solar jets by combining extreme ultraviolet and H α observations, addressing whether cool and hot components originate from the same jet, their morphological similarities and differences, and the role of minifilaments. We analyze 70 jet events simultaneously observed by the Atmospheric Imaging Assembly and the Chinese H α Solar Explorer from 2023 May 25 to 2026 January 15. The events are classified into four types based on whether or not there are significant differences between the two wavebands in terms of length and width; nonlinear force-free field extrapolations are applied to examine magnetic fields. We find that the cool and hot components correspond to different temperature parts of a unified jet, showing spatiotemporal coincidence and kinematic synchronization. Morphologically, 30% show no significant difference in length/width, 37% differ in one dimension, and 33% differ in both. About 80% involve minifilament eruptions; jets with filaments more often exhibit morphological differences (filament nonexpansion, hot shell thickness, insufficient kinetic energy, or material rarefaction). In contrast, jets without filaments tend to show consistent morphologies; when discrepancies occur, they are mainly linked to small magnetic field curvature, which reduces magnetic tension and leads to less acceleration of cool material. These results highlight the complex interaction between thermal, dynamic, and magnetic factors in shaping jet morphology.
Source: The Astrophysical Journal
Authors: Lei Huang, Yang Guo, Zining Ren, Mingde Ding
Institution: Nanjing University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
OpenAlex ID: W7213578248