Results 51 to 60 of about 2,729 (231)
Measurements of the Perpendicular Correlation Length of Coronal Alfvénic Waves with DKIST
The Astrophysical JournalWe have measured the perpendicular correlation length L _⊥ of Alfvénic waves in the corona using data from the Daniel K. Inouye Solar Telescope (DKIST) Cryogenic Near Infrared Spectropolarimeter (Cryo-NIRSP) instrument.
Michael Hahn +3 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 We propose that coronal heating in EUV coronal plumes is weaker, not stronger, than in adjacent nonplume coronal magnetic funnels. This expectation stems from (i) the observation that an EUV plume is born as the magnetic flux at the foot of the plume’s ...
Ronald L. Moore +3 more
doaj +1 more source
Journal of Clinical Ultrasound, Volume 54, Issue 5, Page 1113-1121, June 2026.In this study, 3D‐TVS measurements of the uterine junction zone (JZ) in 120 patients showed that a JZmax threshold of ≥ 0.45 cm yielded 77% sensitivity and 89% specificity for adenomyosis diagnosis. Notably, JZ thickness varies minimally with age, demonstrating its stability and excellent diagnostic performance.
Mengyu Li +3 more
wiley +1 more source
On the Origin of a Broad Quasiperiodic Fast-propagating Wave Train: Unwinding Jet as the Driver
The Astrophysical Journal LettersLarge-scale extreme-ultraviolet waves commonly exhibit as single wave front and are believed to be caused by coronal mass ejections. Utilizing high spatiotemporal resolution imaging observations from the Solar Dynamics Observatory, we present two ...
Xinping Zhou +7 more
doaj +1 more source
Solar wind and kinetic heliophysics [PDF]
Annales Geophysicae, 2018 This paper reviews recent aspects of solar wind physics and elucidates the role Alfvén waves play in solar wind acceleration and turbulence, which prevail in the low corona and inner heliosphere.
E. Marsch, E. Marsch
doaj +1 more source
Influence of Solar Sails on Magnetic Field Measurements in Space Plasmas
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Solar sail technology is ready to be deployed in a satellite mission carrying a science‐grade magnetometer. In preparation for such a mission, it is essential to characterize the interactions between the sail and the ambient plasma that could affect the magnetometer readings.
Konstantinos Horaites +2 more
wiley +1 more source
Frequency-dependent Evolution of Propagating Intensity Disturbances in Polar Plumes
The Astrophysical JournalQuasiperiodic disturbances in EUV emission intensity, propagating along polar plumes in the solar corona, are frequently observed. Analysis of these propagating disturbances in the 171 Å bandpass of the Solar Dynamics Observatory/Atmospheric Imaging ...
Kyung-Suk Cho +3 more
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Capturing global ionospheric response during extreme geomagnetic storms remains a major observational challenge. During 10–11 May, 2024 superstorm, we investigate the height‐dependent response of the F‐region using multi‐constellation GNSS‐POD limb‐sounding measurements from COSMIC‐2, Spire, PlanetiQ, and FengYun‐3 satellites. Approximately 12,
Nimalan Swarnalingam +3 more
wiley +1 more source
Nonlinear fast magnetosonic waves in solar coronal holes [PDF]
Astronomy & Astrophysics, 2001 Summary: A coronal hole is modeled as a slab of cold plasma threaded by a vertical, uniform magnetic field. A periodic driver acting at the coronal base is assumed to drive the velocity component normal to the equilibrium magnetic field. Previous works indicate that, in the linear regime, only fast mode perturbations propagate, since Alfvén waves are ...
Murawski, K. +2 more
openaire +2 more sources
The Astrophysical JournalThe response of a solar coronal plasma loop to an impulsive perturbation, demonstrating the simultaneous formation of guided and leaky fast magnetoacoustic wave trains, is numerically studied.
Mijie Shi +3 more
doaj +1 more source