Evidence for anisotropic non-Maxwellian velocity distributions in the solar transition region

arXiv:2605.03089 · astro-ph.SR · Submitted 2026-05-04 · Read on arXiv

astro-ph.SR

Submitted: 2026-05-04

Updated: 2026-09-15

Comments: 9 pages, 5 figures, accepted for publication in ApJ Letters

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Active Regions — 6× in this paper · explained in 1 episode
• Anisotropy — 3× in this paper · explained in 3 episodes
• Interface Region Imaging Spectrograph — 3× in this paper
• Non-Gaussianity — 3× in this paper · explained in 2 episodes
• Calibration — 2× in this paper · explained in 7 episodes
• Core — 2× in this paper · explained in 2 episodes
• Solar Dynamics Observatory — 2× in this paper
• Helioseismic and Magnetic Imager — 1× in this paper
• Spectral Signature — 1× in this paper · explained in 2 episodes
• alpha — 1× in this paper · explained in 1 episode

Sources

• The Interface Region Imaging Spectrograph (IRIS)
• Why Is Non-thermal Line Broadening of Spectral Lines in The Lower Transition Region of the Sun Independent of Spatial Resolution?
• Non-Maxwellian analysis of the transition-region line profiles observed by the Interface Region Imaging Spectrograph
• RHESSI Microflare Statistics II. X-ray Imaging, Spectroscopy & Energy Distributions
• Accelerated electrons observed down to <7 keV in a NuSTAR solar microflare
• Evidence of Non-Thermal Particles in Coronal Loops Heated Impulsively by Nanoflares
• IRIS observations of short-term variability in moss associated with transient hot coronal loops
• A Statistical Study of IRIS Observational Signatures of Nanoflares and Non-thermal Particles
• High Resolution Observations of the Low Atmospheric Response to Small Coronal Heating Events in an Active Region Core
• Center-to-limb variations in coronal hole and quiet Sun regions obtained with IRIS spectroscopic observations
• Investigating the response of loop plasma to nanoflare heating using RADYN simulations
• HST/STIS High Resolution Echelle Spectra of alpha Centauri A (G2 V)
• Ultraviolet Spectroscopy of Rapidly-Rotating Solar-Mass Stars: Emission Line Redshifts as a Test of the Solar-Stellar Connection
• On the Nature of Nonthermal Broadening of Spectral Lines Observed by IRIS

Related papers

• HXI-DLA2: A Physics-Constrained Deep Learning Algorithm for the ASO-S Hard X-ray Imager
• Effect of Neutron Star Jets on Common Envelope Evolution
• Constraining the origin of magnetic white dwarfs
• JW-FD: A 15-Year Multimodal Dataset for Solar Flare Forecasting
• Phlegethon: a fully compressible magnetohydrodynamic code for simulations in stellar astrophysics
• Can MHD Oscillations Modulate Quasi-Periodic Plasma Release from Coronal Streamers?